• Post a Project

Senior Full-stack Devs: Supercharged by AI

For over ten years Selleo has delivered professional services on more than 150+ software development projects for clients from Europe, the US, Canada, and Australia, designing and building a number of applications throughout a wide spectrum of business domains, industries, and technologies (React, Node, React Native, Python, Ruby on Rails, EmberJS, Elixir).

Extend your in-house team

  • Min project size
    $10,000+
  • Hourly rate
    $25 - $49 / hr
  • Employees
    50 - 249
  • Locations
    Bielsko-Biała, Poland
  • Year founded
    Founded 2005
  • Languages
  • Timezones

1 Language that we service

  • English

1 Timezone that we service

CET
Central European Time (CET)

2 Locations

  • Bielsko-Biała , Poland
  • Bielsko-Biała , Poland

Select Focus Area
Application Platforms
Heroku
60%
Amazon Application Development Framework
30%
Other app platform
10%
Frameworks and CMS
Programming & Scripting
Ruby
40%
Typescript
5%
Industries
Business services
30%
Advertising & marketing
15%
Education
15%
Financial services
10%
Real estate
10%
Gaming
5%
Hospitality & leisure
5%
Information technology
5%
Medical
5%
Clients
Midmarket ($10M - $1B)
50%
Small Business (<$10M)
40%
Enterprise (>$1B)
10%

Pricing Snapshot

Min. project size $10,000+
Avg. hourly rate $25 - $49 /hr
Rating for cost 4.5 /5

What Clients Have Said

Selleo offers competitive pricing and high value for cost, often delivering projects within budget and on time. Clients report satisfaction with their responsiveness and quality, with budgets ranging from $20,000 to over $600,000, indicating flexibility in accommodating various project sizes.

This summary is based on verified Clutch reviews.

Most Common Project Size

$50,000 - $199,999 based on 24 reviews
< $49,999 $50,000 - $199,999 $200,000 - $999,999 > $1,000,000

Select a service to see pricing information

Selleo Review Insights

Overall Review Rating

4.8
  • Quality 4.6
  • Schedule 4.5
  • Cost 4.5
  • Willing to Refer 4.8

Top Mentions

Review Highlights

  • Exceptional Client Feedback and Satisfaction

    Overall, Selleo receives high praise from clients for their dedication, technical expertise, and ability to deliver exceptional results. Many clients express a strong willingness to continue working with Selleo.

  • Cultural Fit and Team Integration

    Clients value Selleo's cultural alignment and their ability to integrate seamlessly with in-house teams. They are seen as more than just a vendor, often becoming an extension of the client's team and contributing to long-term success.

  • Challenges with Timeliness in Some Projects

    While many clients report timely deliveries, a few have experienced delays. These instances suggest room for improvement in meeting deadlines consistently across all projects.

  • Strong Project Management and Communication

    Many clients appreciate Selleo's project management skills, highlighting their organized approach, transparent communication, and responsiveness. They use tools like Slack, Trello, and Jira to maintain clear communication and ensure projects stay on track.

  • Proactive and Solution-Oriented Approach

    Selleo is known for their proactive approach, offering valuable insights and suggestions to improve projects. Clients appreciate their willingness to explore new technologies and their dedication to continuous learning.

  • Attention to UX/UI Design

    Several reviews highlight Selleo's strong focus on UX/UI design, ensuring products are not only functional but also user-friendly and visually appealing. Their design expertise is a key factor in client satisfaction.

Selleo Reviews

Submit a Review
All Filters

0 selected

Sort by
Services
Project Cost
Industry
Location

UX/UI Design for Support & Enablement Platform

  • Custom Software Development UX/UI Design Web Design
  • NodeJS
    +3
  • $50,000 to $199,999
  • May 2025 - Apr. 2026
5.0
Quality
4.0
Schedule
4.0
Cost
4.0
Willing to Refer
5.0

"What stood out was how well they translated business needs into a product that feels coherent and polished."

Apr 24, 2026
CEO, Smarketing
Linda Jensen
Verified
  • Information technology
  • Norway
  • 1-10 Employees
  • Online Review
  • Verified

Selleo designed and developed an MVP for a sales support and enablement platform. The solution included a content library, a manager dashboard, and in-app notifications.

Event Mgmt Platform's Web & Mobile App Dev for Software Co

  • Custom Software Development Mobile App Development UX/UI Design
  • React Native
    +1
  • Confidential
  • Nov. 2024 - Mar. 2025
4.5
Quality
4.5
Schedule
4.0
Cost
4.0
Willing to Refer
4.5

"Overall, I highly value them as a long-term partner."

Feb 19, 2025
Manager, Articulate Entertainment
Anonymous
Verified
  • Arts, entertainment & music
  • Boston, Massachusetts
  • 1-10 Employees
  • Online Review
  • Verified

Selleo has built a live event management platform for a software company. The team has designed and developed a web app and an iOS app to streamline event scheduling and artist and venue management.

Custom Software Development for Engineering Company

  • Custom Software Development IT Staff Augmentation Web Development
  • JavaScript
    +2
  • Confidential
  • Jan. 2024 - Ongoing
5.0
Quality
5.0
Schedule
4.0
Cost
5.0
Willing to Refer
5.0

"They are responsive to our needs, making necessary adjustments promptly to accommodate changing requirements."

Sep 27, 2024
Senior Machine Learning Engineer, PhysicsX
Matthew Brennan
Verified
  • Other industries
  • City of London, England
  • 51-200 Employees
  • Online Review
  • Verified

A software engineering company has hired Selleo to implement a web platform. The team has integrated navigation features, secure authorization protocols for user management, and dynamic tables.

Platform & AI Features Dev for Real Estate FinTech Company

  • AI Development Custom Software Development UX/UI Design
  • NodeJS
    +4
  • $50,000 to $199,999
  • Feb. 2024 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0
"Selleo's communication skills, expertise, and excellent language proficiency ensure clear and effective interactions."
Aug 7, 2024
Co-Founder, Real Estate FinTech Company
M K
Verified
  • Real estate
  • United Arab Emirates
  • 1-10 Employees
  • Online Review
  • Verified

Selleo has been hired by a real estate fintech company to develop a platform for property-related activities. The team integrates admin-verified listings, oversees agency operations, and implements AI features.

App Development for Grey Market Detection Platform

  • Application Testing Custom Software Development UX/UI Design
  • React
  • Confidential
  • May 2022 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"The Selleo team is a pleasure to work with."

Aug 18, 2023
VP Engineering, GreyScout
Kenneth Kerrigan
Verified
  • Other industries
  • Dublin, Ireland
  • 11-50 Employees
  • Online Review
  • Verified

A grey market detection platform has hired Selleo for application design and development. The team is implementing new features and modern designs; key technologies include React.js and TypeScript.  

Staff Aug, UI/UX Design & Dev Services for Learning Platform

  • Custom Software Development Graphic Design IT Staff Augmentation UX/UI Design
  • Confidential
  • July 2020 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
4.0
Willing to Refer
5.0

"The team at Selleo cares about delivering good software, and it shows in all aspects of their work."

May 25, 2023
Director of Engineering, Qstream
Douglas Reynolds
Verified
  • Other industries
  • Burlington, Massachusetts
  • 51-200 Employees
  • Online Review
  • Verified

Selleo provides staff augmentation services for a learning platform. Selleo's team supports the client with UI/UX accessibility improvements and custom development using React.js and RESTful API.

Learning Platform Dev for Educational Services Provider

  • Application Testing Custom Software Development UX/UI Design Web Design Web Development
  • Heroku
    +2
  • Confidential
  • June 2020 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"The team is extremely engaged and delivers a full picture of the project status, and this builds extraordinary trust."

Apr 14, 2023
CTO, Educational Services Provider
Rob Eifler
Verified
  • Education
  • Chicago, Illinois
  • 11-50 Employees
  • Online Review
  • Verified

Selleo designed and developed a career learning platform for an educational services provider. The team integrated the new platform with the legacy platform.

Development for Solution Provider Company

  • Web Development
  • $10,000 to $49,999
  • Oct. 2019 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"Their technical skills and knowledge of new technologies are impressive."

Apr 13, 2021
CEO, Kubed AS
Genevieve Hart
Verified
  • Other industries
  • Oslo, Norway
  • 1-10 Employees
  • Online Review
  • Verified

Selleo updates a software solution provider's web application. The team also created additional features to improve the client's management process. 

UI/UX Design & Audit for Digital Ads Distributor

  • UX/UI Design
  • $10,000 to $49,999
  • May 2020 - Ongoing
4.5
Quality
4.5
Schedule
5.0
Cost
5.0
Willing to Refer
4.5

"I highly recommend them as a trustworthy software development partner."

Sep 8, 2020
CTO, Guidle AG
Drazen Nikolic
Verified
  • Advertising & marketing
  • Baar, Switzerland
  • 11-50 Employees
  • Online Review
  • Verified

A digital ads distributor hired Selleo to assist in UI/UX design, auditing, and project implementation.

Showing 1-10 of 37 Reviews

Our Story

We are Selleo - a community of self-driven digital experts crafting secure, scalable software across SaaS, EdTech, HRM, fintech, healthcare and e‑commerce. Our team blends Ruby on Rails, React/React Native, Node, Python and mobile expertise with Management 3.0 principles: ownership, proactiveness, respect and teamwork.

Since our Rails origins we’ve grown into a 100+ strong, community‑engaged firm with ISO certifications and award‑winning culture, delivering dozens of successful projects.

Clutch verification provides an additional layer of data to help you make the right purchasing decision of business services.

Learn More
Verified Client Reviews
36
Overall Review Rating
4.8
Source
Clutch
Last Updated
April 24, 2026

Business Entity

Business Entity Name Selleo Labs Sp. z o.o.
Source Central Statistical Office of Poland
Jurisdiction of Formation Poland
Date of Formation October 13, 2021
Status Active
Last Updated July 8, 2025
ID 0000925982

Credit Report Results

International Credit Risk Assessment Low Risk
Source Creditsafe
Last Updated July 8, 2025
Learn More About The Clutch Verification Process

Locations (2)

Powstańców Śląskich 3 Bielsko-BiałaPoland 43-300

50 - 75

Contact Selleo

If you’re not seeing exactly what you need here, send this company a custom message. You can talk about your project needs, price, and timeline to get started on your project.

Connect with Selleo on Social

Get connected to see updates from Selleo like new case studies, latest reviews, their latest masterpieces in their portfolio, delivered straight to you.

Gadre Infotech Pvt. Ltd.

(1)
Gadre Infotech Pvt. Ltd. Logotype

Shalaka Teli

Smarketing AS

(1)
Smarketing AS Logotype

Linda Jensen

Additional Connections

(1)