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Home Software Developers Kotlin

Top Kotlin Developers

Kotlin has become the preferred language for Android development and is rapidly expanding into backend services and multiplatform applications. Its concise syntax, null safety, and full interoperability with Java make it a practical choice for teams modernizing existing codebases or building new products from scratch.

Kotlin developers on Clutch are vetted through a verified review process, so you can compare firms based on real client outcomes — not just self-reported credentials. These companies build native Android applications, server-side systems using Ktor or Spring Boot, and cross-platform solutions with Kotlin Multiplatform (KMP). Related directories: Android app development companies, mobile app development companies, and the full Kotlin developers directory.

Ratings Updated: September 10, 2026
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5,517 Companies

Programming & Scripting: Kotlin

List of the Top Kotlin Development Services

  • Exclusive Web Limited Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    London, England

    Services provided

    50% Web Design
    40% Web Development
    10% AR/VR Development

    Focus Areas

    12% Kotlin
    13% AJAX
    13% Ember.js +5
    13% Redux
    13% SQL
    13% Swift
    13% Visual Basic
    10% Objective C

    Launched in 2007, Exclusive Web Limited is a web design agency. Located in London, England, the team focuses on Web Design and Web Development.

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  • Chris Mackie Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    London , England

    Services provided

    50% Web Design
    40% Web Development
    10% AR/VR Development

    Focus Areas

    12% Kotlin
    13% AJAX
    13% Ember.js +5
    13% Redux
    13% SQL
    13% Swift
    13% Visual Basic
    10% Objective C

    Chris Mackie is a web design agency. They are headquartered in London , England and have small team of experts. Their services include Web Design and Web Development.

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  • n7 Studios Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Birmingham , England

    Services provided

    50% Web Design
    40% Web Development
    10% AR/VR Development

    Focus Areas

    12% Kotlin
    13% AJAX
    13% Ember.js +5
    13% Redux
    13% SQL
    13% Swift
    13% Visual Basic
    10% Objective C

    N7 Studios is a web design company launched in 2008. The team focuses on Web Design and Web Development and is located in Birmingham , England.

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  • Celestial Tech Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Birmingham , England

    Services provided

    50% Web Design
    40% Web Development
    10% AR/VR Development

    Focus Areas

    12% Kotlin
    13% AJAX
    13% Ember.js +5
    13% Redux
    13% SQL
    13% Swift
    13% Visual Basic
    10% Objective C

    Celestial Tech is a web design agency. They provide Web Design and Web Development and are headquartered in Birmingham , England.

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  • Scout Websites Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Liverpool , England

    Services provided

    50% Web Design
    40% Web Development
    10% AR/VR Development

    Focus Areas

    12% Kotlin
    13% AJAX
    13% Ember.js +5
    13% Redux
    13% SQL
    13% Swift
    13% Visual Basic
    10% Objective C

    Scout Websites, a web design company, was established in 2012. The small team offers Web Design and Web Development.

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  • Tantrumedia Limited Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Wallasey , England

    Services provided

    50% Web Design
    40% Web Development
    10% AR/VR Development

    Focus Areas

    12% Kotlin
    13% AJAX
    13% Ember.js +5
    13% Redux
    13% SQL
    13% Swift
    13% Visual Basic
    10% Objective C

    Tantrumedia Limited is a web design agency. Founded in 2003, the company is based in Wallasey , England. Their team provides Web Design and Web Development.

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  • Designers' Friend Ltd. Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Edinburgh , Scotland

    Services provided

    50% Web Design
    40% Web Development
    10% AR/VR Development

    Focus Areas

    12% Kotlin
    13% AJAX
    13% Ember.js +5
    13% Redux
    13% SQL
    13% Swift
    13% Visual Basic
    10% Objective C

    Designers' Friend Ltd. Is a small web design agency. They offer Web Design and Web Development and were founded in 2012.

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  • Just Structure Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Bristol , England

    Services provided

    50% Web Design
    40% Web Development
    10% AR/VR Development

    Focus Areas

    12% Kotlin
    13% AJAX
    13% Ember.js +5
    13% Redux
    13% SQL
    13% Swift
    13% Visual Basic
    10% Objective C

    Launched in 2017, Just Structure is a web design agency. Their team focuses on Web Design and Web Development.

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  • Manager Labs Logotype

    Manager Labs

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9

    Services provided

    50% IT Managed Services
    40% Web Development
    10% AR/VR Development

    Focus Areas

    12% Kotlin
    13% AJAX
    13% Ember.js +5
    13% Redux
    13% Typescript
    13% UnrealScript
    13% Visual Basic
    10% Objective C

    Located in , Manager Labs is a small IT managed services company. Their services include IT managed services and Web Development.

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  • Veecode Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Toronto, Canada

    Services provided

    15% Custom Software Development
    25% Pay Per Click
    25% Web Design +2
    25% Web Development
    10% AR/VR Development

    Focus Areas

    12% Kotlin
    13% AJAX
    13% Ember.js +5
    13% Redux
    13% Typescript
    13% UnrealScript
    13% Visual Basic
    10% Objective C

    Veecode is a pay per click company. The Toronto, Canada-based company was established in 2016. Their services include Pay Per Click and Web Design.

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  • VDezine Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Noida, India

    Services provided

    25% E-Commerce Development
    25% Mobile App Development
    25% Web Design +2
    15% Web Development
    10% AR/VR Development

    Focus Areas

    12% Kotlin
    13% AJAX
    13% Ember.js +5
    13% Redux
    13% Typescript
    13% UnrealScript
    13% Visual Basic
    10% Objective C

    VDezine is an e-commerce development company. Based in Noida, India, the team provides E-Commerce Development and Mobile App Development.

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  • Idea Lab Studios Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Belize City, Belize

    Services provided

    15% Custom Software Development
    25% Mobile App Development
    25% Social Media Marketing +2
    25% Web Design
    10% AR/VR Development

    Focus Areas

    12% Kotlin
    13% AJAX
    13% Ember.js +5
    13% Redux
    13% Typescript
    13% UnrealScript
    13% Visual Basic
    10% Objective C

    Idea Lab Studios is a mobile application development firm in Belize City, Belize. Launched in 2002, the team provides Mobile App Development and Social Media Marketing.

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  • Webkites Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Chennai, India

    Services provided

    25% E-Commerce Development
    25% Mobile App Development
    25% Web Design +2
    15% Web Development
    10% AR/VR Development

    Focus Areas

    12% Kotlin
    13% AJAX
    13% Ember.js +5
    13% Redux
    13% Typescript
    13% UnrealScript
    13% Visual Basic
    10% Objective C

    Webkites, an e-commerce development firm, is based in Chennai, India. Launched in 2011, the team focuses on E-Commerce Development and Mobile App Development.

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  • ZenGo Web Services Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Ahmedabad, India

    Services provided

    25% Mobile App Development
    25% Search Engine Optimization
    25% Web Design +2
    15% Web Development
    10% AR/VR Development

    Focus Areas

    12% Kotlin
    13% AJAX
    13% Ember.js +5
    13% Redux
    13% Typescript
    13% UnrealScript
    13% Visual Basic
    10% Objective C

    ZenGo Web Services is a mobile application development company. They are headquartered in Ahmedabad, India, and their services include Mobile App Development and Search Engine Optimization.

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  • Digital Puppy Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Queensburgh, South Africa

    Services provided

    50% Web Design
    40% Web Development
    10% AR/VR Development

    Focus Areas

    12% Kotlin
    13% AJAX
    13% Ember.js +5
    13% Redux
    13% Typescript
    13% UnrealScript
    13% Visual Basic
    10% Objective C

    Digital Puppy is a web design agency. The small Queensburgh, South Africa-based team offers Web Design and Web Development. The firm was founded in 2015.

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  • Gigante Technologies Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Pune, India

    Services provided

    25% E-Commerce Development
    25% Mobile App Development
    25% Web Design +2
    15% Web Development
    10% AR/VR Development

    Focus Areas

    12% Kotlin
    13% AJAX
    13% Ember.js +5
    13% Redux
    13% Typescript
    13% UnrealScript
    13% Visual Basic
    10% Objective C

    Founded in 2011, Gigante Technologies is an e-commerce development firm. Their services include E-Commerce Development and Mobile App Development.

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  • bias Interactive GmbH Logotype

    Not yet reviewed

    $25,000+
    $100 - $149 / hr
    2 - 9
    Langenfeld (Rheinland), Germany

    Services provided

    20% IoT Development
    20% Mobile App Development
    20% UX/UI Design +4
    10% AR/VR Development
    10% Cloud Consulting & SI
    10% ERP Consulting and SI
    10% Web Development

    Focus Areas

    22% Kotlin
    13% Elixir
    13% Go +4
    13% JavaScript
    13% Python
    13% Ruby
    13% Swift

    UX company bias Interactive GmbH was founded in 2018. The firm focuses on UX/UI Design and Mobile App Development, and is small.

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  • Symbiolab GmbH Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Berlin, Germany

    Services provided

    100% Custom Software Development

    Focus Areas

    12% Kotlin
    11% C#
    11% Go +6
    11% HTML5
    11% Java
    11% Python
    11% Redux
    11% Scala
    11% Typescript

    Symbiolab GmbH is a software development firm. Based in Berlin, Germany, the company focuses on Custom Software Development.

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  • Nthrive Technologies Logotype

    Nthrive Technologies

    4.5 1 review
    Undisclosed
    < $25 / hr
    2 - 9

    Services provided

    25% Search Engine Optimization
    20% Social Media Marketing
    15% E-Commerce Development +4
    10% Advertising
    10% Content Marketing
    10% Graphic Design
    10% Web Development

    Focus Areas

    10% Kotlin
    20% ASP.NET
    20% HTML5 +4
    20% PHP
    15% Other programming & scripting languages
    10% Typescript
    5% ASP

    Nthrive Technologies offers comprehensive e-commerce solutions, including website platform migration, SEO practices, and enhancing online visibility. The reviews highlight their capability in delivering complex projects like migrating from WooCommerce to Shopify, with emphasis on transparency, dedication, and a strong understanding of client needs. Although there were occasional delays, clients are generally satisfied with the outcomes and the value for cost.

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  • Digencial Logotype

    Digencial

    Not yet reviewed

    $5,000+
    < $25 / hr
    2 - 9

    Services provided

    30% UX/UI Design
    15% Product Design
    10% Graphic Design +6
    10% Low/No Code Development
    10% Mobile & App Marketing
    10% Web Development
    5% Branding
    5% Content Marketing
    5% Social Media Marketing

    Focus Areas

    10% Kotlin
    20% JavaScript
    20% PHP +3
    20% SQL
    20% XML
    10% Python

    Digencial is an UX design agency. They are located in Jalandhar, India and have small team of experts. Their services include UX/UI Design and Web Development.

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  • Perspective Design Agency Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    2 - 9
    Odesa, Ukraine

    Services provided

    20% Branding
    20% UX/UI Design
    15% E-Commerce Development +5
    15% Low/No Code Development
    10% Web Design
    10% Web Development
    5% Graphic Design
    5% Product Design

    Focus Areas

    10% Kotlin
    25% HTML5
    25% PHP +3
    15% AJAX
    15% Swift
    10% SQL

    Based in Odesa, Ukraine, Perspective Design Agency is a small UX design agency. The team specializes in UX/UI Design and Branding.

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  • Cloud Code Hub Logotype

    Cloud Code Hub

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    2 - 9

    Services provided

    15% Branding
    15% Digital Strategy
    15% E-Commerce Development +5
    15% Video Production
    10% Low/No Code Development
    10% Social Media Marketing
    10% UX/UI Design
    10% Web Development

    Focus Areas

    10% Kotlin
    15% C++
    15% Java +5
    15% JavaScript
    15% PHP
    15% Python
    10% Ember.js
    5% Ruby

    Cloud Code Hub is a branding company. The team is based in Sacramento, California, and their services include Branding and Digital Strategy.

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  • BlockAstro Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    2 - 9
    Karachi, Pakistan

    Services provided

    10% AI Development
    10% Blockchain
    10% Branding +8
    10% Generative AI
    10% Graphic Design
    10% Low/No Code Development
    10% UX/UI Design
    10% Web Design
    10% Web Development
    5% IT Managed Services
    5% IT Staff Augmentation

    Focus Areas

    10% Kotlin
    15% HTML5
    15% Python +6
    15% jquery
    10% AJAX
    10% PHP
    10% SQL
    10% Typescript
    5% JavaScript

    In Karachi, Pakistan, BlockAstro is a web development firm. They focus on Web Development and Branding and were founded in 2023.

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  • Adspyr Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    2 - 9
    Delhi, India

    Services provided

    10% Custom Software Development
    25% Web Design
    20% Search Engine Optimization +6
    20% UX/UI Design
    5% Graphic Design
    5% Other Digital Marketing
    5% Sales Outsourcing
    5% Social Media Marketing
    5% Video Marketing

    Focus Areas

    10% Kotlin
    10% C
    10% C# +11
    10% C++
    10% Ember.js
    10% Redux
    5% AJAX
    5% JavaScript
    5% Objective C
    5% Other programming & scripting languages
    5% PHP
    5% Python
    5% SQL
    5% Visual Basic

    Adspyr is a web design company. Headquartered in Delhi, India, their team offers Web Design and Search Engine Optimization.

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  • Vinova Logotype

    4.6 5 reviews
    $1,000+
    < $25 / hr
    50 - 249
    Singapore, Singapore

    Services provided

    10% Custom Software Development
    15% Low/No Code Development
    10% Blockchain +30
    10% IT Staff Augmentation
    10% Mobile App Development
    10% Web Development
    5% AI Development
    5% IT Managed Services
    1% AI Consulting
    1% API Development
    1% AR/VR Development
    1% Application Management & Support
    1% Application Testing
    1% CRM Consulting and SI
    1% Cloud Consulting & SI
    1% Cybersecurity
    1% DevOps Managed Services
    1% Digital Strategy
    1% E-Commerce Development
    1% ECM Consulting and SI
    1% ERP Consulting and SI
    1% Email Marketing
    1% Employer of Record (EOR) Services
    1% Enterprise App Modernization
    1% Generative AI
    1% HR Outsourcing
    1% IT Strategy Consulting
    1% IoT Development
    1% Microservices Architecture Services
    1% Mobile & App Marketing
    1% Robotics Process Automation
    1% Wearable App Development
    1% Web Design

    Focus Areas

    10% Kotlin
    25% Ruby
    20% Java +6
    15% ASP.NET
    10% Objective C
    5% Go
    5% JavaScript
    5% PHP
    5% Typescript

    Vinova is a bespoke software development firm specializing in tailored software solutions and IT support. With consistently positive feedback, 100% of reviewers highlight their professionalism, responsiveness, and flexibility. Clients appreciate their capability to deliver timely solutions and their adeptness in software engineering, making them a reliable choice for custom software creation.

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    Reviews mention Results-oriented

    Clients have expressed strong satisfaction with Vinova's results-oriented approach, highlighting their effective communication and collaboration. One client noted that the project director's involvement in meetings ensured consistent messaging, which streamlined the development process. The access to an online project management tool allowed for real-time updates and direct inputs, enhancing overall efficiency. The positive feedback emphasizes Vinova's ability to deliver results that meet client expectations, leading to ongoing partnerships.
    • Creative Application Development for Digital Media Company
      4.0 Mar 24, 2015

      Vinova also gave us access to their project management online Web tool so we were instantly updated on any progress. Through the Web tool, we could give our inputs directly to the production team without having to go back and forth through emails. Not really. We were quite happy with the outcome and have continued to engage with Vinova for other services.

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    1 of 2 Custom Software Development reviews are 5 stars
    1 new review for Custom Software Development in past 6 months
    Unknown avg. project cost

    Custom Software Development PROJECT HIGHLIGHT

    IT Staff Augmentation for International School

    5.0 — Vinova provides software development and IT support resources to augment an international school's in-house teams. The vendor has also provided a UX/UI designer for the client's short-term projects. Read more
    Read 2 Reviews

    Industry Experience

    Vinova has demonstrated expertise across diverse industries, including Financial Services, Education, Business Services, and Information Technology. Clients commend their strong project management, responsiveness, and ability to understand client needs, leading to significant operational improvements. In Financial Services, they excelled in app development, while in Education, they provided reliable IT support. Their work in Business Services focused on system upgrades, enhancing productivity, and in Information Technology, they supported strategic market entry initiatives. Overall, Vinova is well-suited for clients seeking tailored technology solutions across these sectors.

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    Select Industry to see insights

    Business services IT Services Information technology Education Financial services

    Average Project Cost Breakdown

    $50,000 to $199,999 (1)

    What Clients Have Said

    Clients consistently commend Vinova for providing good value for the cost of their services. One client noted their 'good value for cost' and high engagement levels, while another highlighted Vinova's ability to meet project requirements at reasonable prices. Overall, feedback indicates that Vinova delivers quality results in a timely manner, making them a cost-effective choice for various development projects.
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  • GeekCommerce Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Guadalajara, Mexico

    Services provided

    50% Digital Strategy
    40% Web Development
    10% AR/VR Development

    Focus Areas

    10% Kotlin
    13% Apex
    13% Ember.js +5
    13% Java
    13% JavaScript
    13% Python
    13% Redux
    12% AJAX

    GeekCommerce is a Digital Strategy company. Founded in 2016, the team provides Digital Strategy and Web Development. The agency is located in Guadalajara, Mexico.

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  • Alegna Technologies Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Kennesaw, GA

    Services provided

    20% Custom Software Development
    20% Application Testing
    20% IT Managed Services +2
    20% IT Strategy Consulting
    20% Web Development

    Focus Areas

    20% Kotlin
    20% AJAX
    20% Python +2
    20% Redux
    20% Swift

    Alegna Technologies is a custom software development firm launched in 2011. Based in Kennesaw, Georgia, the team focuses on Custom Software Development and IT managed services.

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  • Aims IT Solution Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Dover, DE

    Services provided

    20% Content Writing Services
    20% Graphic Design
    20% Mobile App Development +3
    20% Web Development
    10% Pay Per Click
    10% Search Engine Optimization

    Focus Areas

    20% Kotlin
    20% Java
    20% JavaScript +2
    20% PHP
    20% Python

    Aims IT Solution is a Rawalpindi, Pakistan-based graphic design company. They offer Graphic Design and Web Development and were launched in 2021.

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  • Websoars Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Singapore, Singapore

    Services provided

    20% E-Commerce Development
    20% Mobile App Development
    20% Search Engine Optimization +2
    20% Web Design
    20% Web Development

    Focus Areas

    20% Kotlin
    20% Java
    20% JavaScript +2
    20% Objective C
    20% Swift

    SEO agency Websoars was launched in 2018. The small team provides Search Engine Optimization and Web Design.

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  • Spaceapps.ro Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Galați, Romania

    Services provided

    20% Mobile App Development
    20% Pay Per Click
    20% Search Engine Optimization +2
    20% Social Media Marketing
    20% Web Development

    Focus Areas

    20% Kotlin
    20% HTML5
    20% JavaScript +2
    20% Swift
    20% Typescript

    Based in Galați, Romania, Spaceapps.ro is a small social media marketing agency. The team offers Social Media Marketing and Search Engine Optimization.

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  • Cubic Agency Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    București, Romania

    Services provided

    20% CRM Consulting and SI
    20% E-Commerce Development
    20% Graphic Design +2
    20% Mobile App Development
    20% Web Development

    Focus Areas

    20% Kotlin
    20% Java
    20% JavaScript +2
    20% PHP
    20% Swift

    Cubic Agency, a graphic design company, specializes in Graphic Design and CRM consulting and SI. The agency is based in București, Romania.

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  • Fuzzy Red Panda Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    El Paso, TX

    Services provided

    30% Web Design
    25% Graphic Design
    20% Social Media Marketing +2
    15% Web Development
    10% AR/VR Development

    Focus Areas

    34% Kotlin
    33% Ember.js
    33% Redux

    Fuzzy Red Panda is a web design agency. They are based in El Paso, Texas and have small team. They focus on Web Design and Graphic Design.

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  • Pacific Infotech UK Ltd Logotype

    2.8 2 reviews
    Undisclosed
    Undisclosed
    10 - 49
    Hounslow, England

    Services provided

    10% Custom Software Development
    10% Branding
    10% Cloud Consulting & SI +7
    10% Cybersecurity
    10% IT Managed Services
    10% IT Strategy Consulting
    10% Mobile App Development
    10% UX/UI Design
    10% Unified Communications Consulting & SI
    10% Web Design

    Focus Areas

    30% Kotlin
    30% Swift
    20% Java +1
    20% Objective C

    Specialists in delivering bespoke IT support services for the hotel and hospitality industry, Pacific Infotech’s Microsoft Certified consultants work with businesses across the UK to get the very

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  • Visat Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    10 - 49
    Clarksburg, MD

    Services provided

    30% Custom Software Development
    30% IT Managed Services
    30% IT Staff Augmentation +1
    10% Web Design

    Focus Areas

    20% Kotlin
    30% C++
    30% JavaScript +1
    20% Ember.js

    Visat is an IT staff augmentation company located in Clarksburg, Maryland. The team focuses on IT staff augmentation and Custom Software Development.

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  • Rividium Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    10 - 49
    Manassas, VA

    Services provided

    30% Custom Software Development
    20% Cybersecurity
    20% HR Consulting +2
    20% IT Managed Services
    10% Web Design

    Focus Areas

    20% Kotlin
    20% AJAX
    20% Ember.js +2
    20% JavaScript
    20% Redux

    Founded in 2008, Rividium is a software development firm. The small team provides Custom Software Development and IT managed services.

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  • George Street Services Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    10 - 49
    Walkersville, MD

    Services provided

    30% Custom Software Development
    30% Cybersecurity
    30% IT Managed Services +1
    10% Web Design

    Focus Areas

    20% Kotlin
    20% AJAX
    20% Ember.js +2
    20% JavaScript
    20% Redux

    Software development company George Street Services is located in Walkersville, Maryland. They specialize in Custom Software Development and IT managed services.

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  • Jubilant Media Studios Private Limited Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    10 - 49
    Noida, India

    Services provided

    20% Content Writing Services
    15% Mobile App Development
    15% Web Development +5
    10% Branding
    10% Graphic Design
    10% Pay Per Click
    10% Search Engine Optimization
    10% Social Media Marketing

    Focus Areas

    20% Kotlin
    20% HTML5
    20% Java +2
    20% JavaScript
    20% PHP

    Jubilant Media Studios Private Limited is a Content Writing Services company. Their small team is located in Noida, India. Their services include Content Writing Services and Web Development.

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  • IDEAQU Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    10 - 49
    Haymarket, Australia

    Services provided

    10% Custom Software Development
    10% AI Development
    10% Application Testing +7
    10% BI & Big Data Consulting & SI
    10% Cloud Consulting & SI
    10% Digital Engineering
    10% IoT Development
    10% Mobile App Development
    10% UX/UI Design
    10% Web Development

    Focus Areas

    20% Kotlin
    20% C#
    20% HTML5 +2
    20% PHP
    20% Swift

    IDEAQU is an UX agency. Their team is in Haymarket, Australia. The company specializes in UX/UI Design and BI & big data consulting & SI.

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  • Hubotik Systems Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    10 - 49
    Des Moines, IA

    Services provided

    15% Custom Software Development
    20% Architectural Design
    20% Mobile App Development +3
    15% Application Testing
    15% ERP Consulting and SI
    15% IT Strategy Consulting

    Focus Areas

    15% Kotlin
    15% Java
    15% JavaScript +4
    15% Objective C
    15% Ruby
    15% Swift
    10% HTML5

    Hubotik Systems is an Architectural Design company. In Des Moines, Iowa and Pune, India, the firm provides Architectural Design and Mobile App Development.

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  • CodeIT Logotype

    CodeIT

    Not yet reviewed

    $5,000+
    $50 - $99 / hr
    10 - 49

    Services provided

    20% Low/No Code Development
    20% Mobile App Development
    20% Product Design +2
    20% UX/UI Design
    20% Web Development

    Focus Areas

    10% Kotlin
    20% HTML5
    20% Java +3
    20% JavaScript
    20% PHP
    10% Swift

    CodeIT is an user experience agency. The agency is based in Beograd, Serbia. Their services include UX/UI Design and Product Design.

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  • M&N Digital Service Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    Freelancer
    Karachi, Pakistan

    Services provided

    10% Digital Strategy
    10% Search Engine Optimization
    10% Social Media Marketing +12
    10% Web Design
    10% Web Development
    5% Advertising
    5% Event Management
    5% Graphic Design
    5% IT Managed Services
    5% Logo
    5% Market Research
    5% Marketing Strategy
    5% Other Design
    5% Other Digital Marketing
    5% Packaging Design

    Focus Areas

    12% Kotlin
    19% AJAX
    19% HTML5 +5
    19% Redux
    13% Visual Basic
    6% Ember.js
    6% Other programming & scripting languages
    6% PHP

    Launched in 2024, M&N Digital Service is a small Karachi, Pakistan-based Digital Strategy company. Their team specializes in Digital Strategy and Social Media Marketing.

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  • RapidData Technologies Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    250 - 999
    Dubai, United Arab Emirates

    Services provided

    15% AI Development
    15% Cloud Consulting & SI
    15% IT Strategy Consulting +5
    15% IoT Development
    10% Application Testing
    10% BI & Big Data Consulting & SI
    10% Low/No Code Development
    10% Mobile App Development

    Focus Areas

    17% Kotlin
    17% Go
    17% Java +3
    17% Python
    16% Scala
    16% Swift

    RapidData Technologies, an IT strategy consulting company, is based in Dubai, United Arab Emirates and New York, New York. The team offers IT strategy consulting and BI & big data consulting & SI.

    Read more
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  • R2M.ai - Out of Business Logotype

    5.0 1 review
    $1,000+
    < $25 / hr
    2 - 9
    South Plainfield, NJ

    Services provided

    30% Mobile & App Marketing
    30% Web Development
    20% Email Marketing +2
    10% AR/VR Development
    10% BI & Big Data Consulting & SI

    Focus Areas

    17% Kotlin
    25% AJAX
    19% Redux +3
    13% C
    13% Objective C
    13% Visual Basic

    R2M.ai - Out of Business provided services in web development, particularly leveraging HubSpot CMS, and technical SEO consulting to build scalable and performant websites. Overall, the feedback highlights their technical proficiency and collaborative approach, though there were minor communication challenges. Clients appreciated their accommodating and detail-oriented nature, resulting in significant improvements in website performance and organic traffic.

    See all 1 projects
    View Profile
  • Axentit Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249
    Ciudad de México, Mexico

    Services provided

    20% Custom Software Development
    50% Business Consulting
    20% Application Testing +1
    10% Web Design

    Focus Areas

    20% Kotlin
    20% AJAX
    20% Ember.js +2
    20% Java
    20% PHP

    Axentit is a Business Consulting company. Located in Ciudad de México, Mexico, their team specializes in Business Consulting and Custom Software Development.

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  • Newton Vision Corporation Logotype

    Newton Vision Corporation

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249

    Services provided

    20% Custom Software Development
    20% BI & Big Data Consulting & SI
    20% Business Consulting +2
    20% Cloud Consulting & SI
    20% IT Strategy Consulting

    Focus Areas

    20% Kotlin
    20% C#
    20% C++ +2
    20% Java
    20% JavaScript

    Newton Vision Corporation is an IT strategy consulting company established in 2008. Their services include IT strategy consulting and BI & big data consulting & SI.

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  • Baltic Technology Group Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249
    Rīga, Latvia

    Services provided

    10% Custom Software Development
    10% Application Testing
    10% BI & Big Data Consulting & SI +7
    10% Cloud Consulting & SI
    10% DevOps Managed Services
    10% IoT Development
    10% Mobile App Development
    10% Recruiting
    10% UX/UI Design
    10% Web Development

    Focus Areas

    10% Kotlin
    10% C#
    10% C++ +7
    10% Go
    10% Java
    10% JavaScript
    10% PHP
    10% Python
    10% Ruby
    10% Typescript

    Baltic Technology Group is an user experience company. Founded in 1991, the team provides UX/UI Design and BI & big data consulting & SI. The company is located in Michigan and Rīga, Latvia.

    Read more
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  • G&G Technologies, Inc. Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249
    Cary, NC

    Services provided

    10% Custom Software Development
    10% Application Testing
    10% Business Consulting +7
    10% Cloud Consulting & SI
    10% E-Commerce Development
    10% ERP Consulting and SI
    10% IT Managed Services
    10% IT Staff Augmentation
    10% Mobile App Development
    10% Web Development

    Focus Areas

    10% Kotlin
    10% AJAX
    10% ASP.NET +7
    10% C++
    10% Java
    10% Objective C
    10% Ruby
    10% Rust
    10% Swift
    10% Visual Basic

    G&G Technologies, Inc. Is a midsize Cary, North Carolina-based cloud consulting & SI company. The team provides cloud consulting & SI and ERP consulting and SI.

    Read more
    View Profile
  • Marketpath CMS Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Indianapolis, IN

    Services provided

    40% Content Marketing
    20% Search Engine Optimization
    20% Web Design +2
    10% AR/VR Development
    10% Web Development

    Focus Areas

    34% Kotlin
    33% Ember.js
    33% Redux

    Marketpath CMS is an Indianapolis, Indiana-based Content Marketing company. Their services include Content Marketing and Search Engine Optimization.

    Read more
    View Profile
  • What's Up Doha Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Doha, Qatar

    Services provided

    20% Email Marketing
    20% Search Engine Optimization
    20% Social Media Marketing +3
    20% Web Design
    10% AR/VR Development
    10% Web Development

    Focus Areas

    34% Kotlin
    33% Ember.js
    33% Redux

    What's Up Doha is an Email Marketing company founded in 2015. Based in Doha, Qatar, the team focuses on Email Marketing and Search Engine Optimization.

    Read more
    View Profile
  • Level 5 Technology Solutions Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    Fresno, CA

    Services provided

    40% Web Design
    15% Logo
    15% Print Design +3
    10% AR/VR Development
    10% Search Engine Optimization
    10% Web Development

    Focus Areas

    34% Kotlin
    33% Ember.js
    33% Redux

    Level 5 Technology Solutions is a web design company in Fresno, California. Established in 2009, the team focuses on Web Design and Logo.

    Read more
    View Profile

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Ability to deliver
Focus
Clutch Leaders Matrix

Rollover to see company insights or click a company below for more details.

1 Empat
2 Futured
3 Geniusee
4 You are launched
5 Droids On Roids
6 Suffescom Solutions Inc
7 Stfalcon
8 Synergy Labs
9 nomtek
10 ArcTouch
11 itCraft
12 NERDZ LAB
13 Ackee
14 TechnoYuga
15 Konstant Infosolutions

List of the Top 15 Kotlin Development Services

  1. Empat Logotype

    Empat

    $10,000+
    $25 - $49 / hr
    250 - 999
    San Francisco, CA

    Ability to deliver

    40/40.0
    20/20 Reviews
    10/10 Clients & Experience
    10/10 Market Presence

    Service focus

    35% Custom Software Development
    25% Kotlin
    5% Web Development
    40% Mobile App Development
    20% Other
    View Profile Visit Website
  2. Futured Logotype

    Futured

    $10,000+
    $50 - $99 / hr
    50 - 249
    Brno, Czech Republic

    Ability to deliver

    38.7/40.0
    19.4/20 Reviews
    10/10 Clients & Experience
    9.3/10 Market Presence

    Service focus

    15% Web Development
    75% Mobile App Development
    10% Other
    View Profile Visit Website
  3. Geniusee Logotype

    Geniusee

    $25,000+
    $25 - $49 / hr
    250 - 999
    Warszawa, Poland

    Ability to deliver

    40/40.0
    20/20 Reviews
    10/10 Clients & Experience
    10/10 Market Presence

    Service focus

    40% Custom Software Development
    20% Kotlin
    10% Web Development
    20% Mobile App Development
    30% Other
    View Profile Visit Website
  4. You are launched Logotype

    You are launched

    $10,000+
    $25 - $49 / hr
    50 - 249
    Limassol, Cyprus

    Ability to deliver

    39.8/40.0
    19.8/20 Reviews
    10/10 Clients & Experience
    10/10 Market Presence

    Service focus

    40% Custom Software Development
    30% Kotlin
    50% Mobile App Development
    10% Other
    View Profile Visit Website
  5. Droids On Roids Logotype

    Droids On Roids

    $75,000+
    $50 - $99 / hr
    50 - 249
    Wrocław, Poland

    Ability to deliver

    38.4/40.0
    18.6/20 Reviews
    10/10 Clients & Experience
    9.8/10 Market Presence

    Service focus

    10% Custom Software Development
    40% Kotlin
    80% Mobile App Development
    10% Other
    View Profile Visit Website
  6. Suffescom Solutions Inc Logotype

    Suffescom Solutions Inc

    $25,000+
    $25 - $49 / hr
    250 - 999
    New York, NY

    Ability to deliver

    39.6/40.0
    19.6/20 Reviews
    10/10 Clients & Experience
    10/10 Market Presence

    Service focus

    40% Web Development
    40% Mobile App Development
    20% Other
    View Profile Visit Website
  7. Stfalcon Logotype

    Stfalcon

    $10,000+
    $25 - $49 / hr
    50 - 249
    Khmel'nyts'kyi, Ukraine

    Ability to deliver

    36.9/40.0
    17/20 Reviews
    10/10 Clients & Experience
    9.9/10 Market Presence

    Service focus

    30% Custom Software Development
    50% Kotlin
    40% Mobile App Development
    30% Other
    View Profile Visit Website
  8. Synergy Labs Logotype

    Synergy Labs

    $25,000+
    $50 - $99 / hr
    50 - 249
    Hollywood, FL

    Ability to deliver

    39.5/40.0
    20/20 Reviews
    10/10 Clients & Experience
    9.5/10 Market Presence

    Service focus

    10% Custom Software Development
    30% Kotlin
    10% Web Development
    60% Mobile App Development
    20% Other
    View Profile Visit Website
  9. nomtek Logotype

    nomtek

    $25,000+
    $50 - $99 / hr
    50 - 249
    Wrocław, Poland

    Ability to deliver

    36.7/40.0
    17/20 Reviews
    10/10 Clients & Experience
    9.7/10 Market Presence

    Service focus

    20% Custom Software Development
    50% Kotlin
    45% Mobile App Development
    10% AR/VR Development
    25% Other
    View Profile Visit Website
  10. ArcTouch Logotype

    ArcTouch

    $100,000+
    $50 - $99 / hr
    250 - 999
    San Francisco, CA

    Ability to deliver

    37.8/40.0
    17.8/20 Reviews
    10/10 Clients & Experience
    10/10 Market Presence

    Service focus

    10% Web Development
    20% Mobile App Development
    70% Other
    View Profile Visit Website
  11. itCraft Logotype

    itCraft

    $25,000+
    $50 - $99 / hr
    50 - 249
    Warszawa, Poland

    Ability to deliver

    37.6/40.0
    18/20 Reviews
    10/10 Clients & Experience
    9.6/10 Market Presence

    Service focus

    50% Custom Software Development
    40% Kotlin
    50% Mobile App Development
    View Profile Visit Website
  12. NERDZ LAB Logotype

    NERDZ LAB

    $5,000+
    $25 - $49 / hr
    50 - 249
    L'viv, Ukraine

    Ability to deliver

    38.9/40.0
    19.4/20 Reviews
    10/10 Clients & Experience
    9.5/10 Market Presence

    Service focus

    35% Web Development
    35% Mobile App Development
    30% Other
    View Profile Visit Website
  13. Ackee Logotype

    Ackee

    $25,000+
    $50 - $99 / hr
    50 - 249
    Karlín, Czech Republic

    Ability to deliver

    38.2/40.0
    18.6/20 Reviews
    10/10 Clients & Experience
    9.6/10 Market Presence

    Service focus

    30% Web Development
    60% Mobile App Development
    10% Other
    View Profile Visit Website
  14. TechnoYuga Logotype

    TechnoYuga

    $10,000+
    < $25 / hr
    50 - 249
    New Delhi, India

    Ability to deliver

    39.8/40.0
    19.8/20 Reviews
    10/10 Clients & Experience
    10/10 Market Presence

    Service focus

    25% Custom Software Development
    23% Kotlin
    15% Web Development
    25% Mobile App Development
    35% Other
    View Profile Visit Website
  15. Konstant Infosolutions Logotype

    Konstant Infosolutions

    $5,000+
    $25 - $49 / hr
    250 - 999
    Jaipur, India

    Ability to deliver

    39.8/40.0
    20/20 Reviews
    10/10 Clients & Experience
    9.8/10 Market Presence

    Service focus

    10% Web Development
    60% Mobile App Development
    30% Other
    View Profile Visit Website
  16. Excellent Webworld Logotype

    Excellent Webworld

    $25,000+
    $25 - $49 / hr
    250 - 999
    Lakeville, MN

    Ability to deliver

    36.6/40.0
    16.8/20 Reviews
    9.9/10 Clients & Experience
    9.9/10 Market Presence

    Service focus

    15% Custom Software Development
    30% Kotlin
    10% Web Development
    10% Mobile App Development
    15% Enterprise App Modernization
    50% Other
    View Profile Visit Website
  17. CitrusBits Logotype

    CitrusBits

    $50,000+
    $100 - $149 / hr
    50 - 249
    Los Angeles, CA

    Ability to deliver

    36/40.0
    16.4/20 Reviews
    10/10 Clients & Experience
    9.6/10 Market Presence

    Service focus

    20% Custom Software Development
    55% Kotlin
    40% Mobile App Development
    30% AR/VR Development
    10% Other
    View Profile Visit Website
  18. Sidekick Interactive Logotype

    Sidekick Interactive

    $25,000+
    $100 - $149 / hr
    10 - 49
    Montréal, Canada

    Ability to deliver

    36.9/40.0
    17.4/20 Reviews
    10/10 Clients & Experience
    9.5/10 Market Presence

    Service focus

    20% Custom Software Development
    50% Kotlin
    20% Web Development
    40% Mobile App Development
    20% Other
    View Profile Visit Website
  19. Tapptitude Logotype

    Tapptitude

    $5,000+
    $25 - $49 / hr
    50 - 249
    Cluj-Napoca, Romania

    Ability to deliver

    39/40.0
    19.4/20 Reviews
    10/10 Clients & Experience
    9.6/10 Market Presence

    Service focus

    20% Web Development
    50% Mobile App Development
    30% Other
    View Profile Visit Website
  20. WOLFPACK DIGITAL Logotype

    WOLFPACK DIGITAL

    $10,000+
    $50 - $99 / hr
    50 - 249
    Cluj-Napoca, Romania

    Ability to deliver

    39.6/40.0
    20/20 Reviews
    10/10 Clients & Experience
    9.6/10 Market Presence

    Service focus

    45% Web Development
    45% Mobile App Development
    10% Other
    View Profile Visit Website
  21. Lampa Software Logotype

    Lampa Software

    $25,000+
    $25 - $49 / hr
    50 - 249
    Vinnytsia, Ukraine

    Ability to deliver

    38.2/40.0
    18.6/20 Reviews
    10/10 Clients & Experience
    9.6/10 Market Presence

    Service focus

    30% Web Development
    70% Mobile App Development
    View Profile Visit Website
  22. The NineHertz Logotype

    The NineHertz

    $25,000+
    $25 - $49 / hr
    250 - 999
    Jaipur, India

    Ability to deliver

    38/40.0
    18.2/20 Reviews
    10/10 Clients & Experience
    9.8/10 Market Presence

    Service focus

    20% Custom Software Development
    20% Kotlin
    20% Mobile App Development
    10% Application Management & Support
    20% Enterprise App Modernization
    30% Other
    View Profile Visit Website
  23. Infinum Logotype

    Infinum

    $50,000+
    $150 - $199 / hr
    250 - 999
    New York, NY

    Ability to deliver

    40/40.0
    20/20 Reviews
    10/10 Clients & Experience
    10/10 Market Presence

    Service focus

    20% Custom Software Development
    10% Kotlin
    20% Web Development
    20% Mobile App Development
    40% Other
    View Profile Visit Website
  24. UplineSoft Logotype

    UplineSoft

    $5,000+
    $25 - $49 / hr
    250 - 999
    New York, NY

    Ability to deliver

    38.9/40.0
    20/20 Reviews
    10/10 Clients & Experience
    8.9/10 Market Presence

    Service focus

    60% Custom Software Development
    15% Kotlin
    40% Other
    View Profile Visit Website
  25. TechAhead Logotype

    TechAhead

    $25,000+
    $25 - $49 / hr
    50 - 249
    Agoura Hills, CA

    Ability to deliver

    39.9/40.0
    20/20 Reviews
    10/10 Clients & Experience
    9.9/10 Market Presence

    Service focus

    10% Custom Software Development
    15% Kotlin
    50% Mobile App Development
    20% Enterprise App Modernization
    20% Other
    View Profile Visit Website
  26. Jelvix Logotype

    Jelvix

    $50,000+
    $50 - $99 / hr
    250 - 999
    Tallinn, Estonia

    Ability to deliver

    38.9/40.0
    20/20 Reviews
    9.1/10 Clients & Experience
    9.8/10 Market Presence

    Service focus

    70% Custom Software Development
    15% Kotlin
    10% Mobile App Development
    20% Other
    View Profile Visit Website
  27. Bolder Apps Logotype

    Bolder Apps

    $5,000+
    $50 - $99 / hr
    50 - 249
    Miami, FL

    Ability to deliver

    37.8/40.0
    18.6/20 Reviews
    10/10 Clients & Experience
    9.2/10 Market Presence

    Service focus

    10% Custom Software Development
    30% Kotlin
    10% Web Development
    60% Mobile App Development
    20% Other
    View Profile Visit Website
  28. JPLoft Logotype

    JPLoft

    $10,000+
    $50 - $99 / hr
    50 - 249
    Denver, CO

    Ability to deliver

    39.7/40.0
    20/20 Reviews
    10/10 Clients & Experience
    9.7/10 Market Presence

    Service focus

    10% Custom Software Development
    15% Kotlin
    10% Web Development
    50% Mobile App Development
    30% Other
    View Profile Visit Website
  29. WEZOM Logotype

    WEZOM

    $50,000+
    $25 - $49 / hr
    250 - 999
    Schaumburg, IL

    Ability to deliver

    39.4/40.0
    19.6/20 Reviews
    10/10 Clients & Experience
    9.8/10 Market Presence

    Service focus

    30% Custom Software Development
    11% Kotlin
    10% Mobile App Development
    60% Other
    View Profile Visit Website
  30. LeanCode Logotype

    LeanCode

    $25,000+
    $50 - $99 / hr
    50 - 249
    Warszawa, Poland

    Ability to deliver

    39.6/40.0
    20/20 Reviews
    10/10 Clients & Experience
    9.6/10 Market Presence

    Service focus

    15% Custom Software Development
    15% Kotlin
    80% Mobile App Development
    5% Other
    View Profile Visit Website

Latest Kotlin Articles

See all articles
UI Specifications: How to Create a UI Spec Document cover image

UI Specifications: How to Create a UI Spec Document

Updated August 19, 2026
Hannah Hicklen

A UI specifications document defines how every screen in your product looks, behaves, and responds to user input. Here's how to write one that developers...

Development Product Launch
Vibecoding vs. Software Development Agency: When AI-Generated Code Is Enough — and the Seven... cover image

Vibecoding vs. Software Development Agency: When AI-Generated Code Is Enough — and the Seven...

Updated August 6, 2026
Joshua Webber

Is AI-generated code enough, or is it time to bring in real developers? These seven thresholds show you the exact moment when a vibecoded build becomes a...

Development Thought Leadership, Scaling
AI-Assisted Software Development: Productivity Gains vs. Quality Risks cover image

AI-Assisted Software Development: Productivity Gains vs. Quality Risks

Updated July 15, 2026
Kateryna Stankova

AI-assisted software development has already become the everyday practice for the majority of development agencies. This article dives into its benefits and...

Development Thought Leadership

Kotlin Development FAQs

Clutch features companies that build modern Android and cross-platform applications using the Kotlin programming language quarterly based on a proprietary methodology. The top Kotlin development companies for 2026 include:

  1. Futured

  2. Empat

  3. Suffescom Solutions Inc

  4. Geniusee

  5. Droids On Roids

  6. You are launched

  7. Stfalcon

  8. nomtek

  9. Synergy Labs

  10. ArcTouch

  11. Ackee

  12. Excellent Webworld

  13. TechnoYuga

  14. Brainvire Infotech Inc

  15. Sidekick Interactive

Kotlin developers write applications using JetBrains' Kotlin programming language. On the Android side, they build native mobile applications using Jetpack Compose, Android SDK APIs, and modern architecture patterns like MVVM or MVI.

On the backend, Kotlin developers build server-side APIs and microservices using Ktor or Spring Boot. Furthermore, an emerging specialty is Kotlin Multiplatform (KMP), where developers write shared business logic that compiles to both Android and iOS.

Clutch’s verified pricing data shows that a focused Android app build typically ranges from $25,000 – $150,000, depending on factors like its complexity, features, and backend requirements.

Meanwhile, hourly rates for Kotlin development firms range from $25 – $149 per hour, with firms in Eastern Europe and Latin America often on the lower end and North American or Western European firms on the higher end.

Dedicated Kotlin shops maintain deeper expertise than generalist firms that work across many languages. They stay current with JetBrains' release cycle, know which libraries are production-stable versus experimental, and have established patterns for common challenges like coroutine exception handling or Compose state management. This depth typically translates to faster delivery, cleaner architecture, and lower long-term maintenance costs.

Start by outlining your project’s specific requirements and assessing their technical fit; confirm the firm has production Kotlin experience rather than Java teams that have adopted Kotlin syntax superficially.

Then, ask to see Kotlin-specific code samples or open-source contributions, and inquire about their familiarity with Kotlin coroutines, Flow, and Kotlin Multiplatform if relevant. Take a moment to thoroughly review their Clutch profiles and client ratings for projects similar to yours in complexity and industry.

Be cautious of firms that list Kotlin as a skill but whose case studies reference only Java or legacy Android development. Other red flags to watch out for include no mention of testing practices, an inability to discuss architectural patterns like Clean Architecture or MVI, and vague answers about how they handle Kotlin version migrations and library compatibility.

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