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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

  • 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.

  • High-Quality Deliverables and Innovation

    Selleo consistently delivers high-quality products, often exceeding client expectations. Their focus on innovation and quality leads to successful project outcomes, with minimal bugs and reliable performance.

  • 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.

  • Expertise in Custom Software Development

    Selleo is highly praised for their proficiency in developing custom software solutions across various platforms, such as web, mobile, and SaaS. Clients from industries like finance, healthcare, and real estate commend their ability to tailor solutions to specific business needs.

  • 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.

Selleo Reviews

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MVP Development & UX/UI Design for Web-Based Educational Co

  • Custom Software Development UX/UI Design
  • Usability Testing
    +2
  • Confidential
  • Sep. 2025 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"What stands out about Selleo is the level of ownership the team takes."

Mar 27, 2026
Founder, Emany
Martin Nymann
  • Education
  • Copenhagen, Denmark
  • 1-10 Employees
  • Online Review

Selleo has assessed, estimated, and structured an MVP roadmap for a web-based educational company. The team has designed the UX/UI, built a prototype to validate its market fit, and developed the platform.

Web App Development for Business Services Company

  • Web Development
  • Other app platform
  • Confidential
  • June 2025 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"Their capacity to understand our business needs and convert those into developments is impressive."

Dec 22, 2025
Co-Founder, Business Services Company
Anonymous
Verified
  • Business services
  • Luxembourg
  • 1-10 Employees
  • Online Review
  • Verified

Selleo has developed a web app for a business services company. The team has built the platform from scratch, implementing custom features and conducting testing and deployment support.

Custom Software Development for FinTech Company

  • Custom Software Development IT Staff Augmentation Web Development
  • Airtable
    +4
  • Confidential
  • Jan. 2019 - Nov. 2024
5.0
Quality
4.5
Schedule
4.5
Cost
5.0
Willing to Refer
5.0
"Selleo doesn't rush to get something done; they get it done correctly."
Nov 22, 2023
VP of Product, FinTech Company
Frank Conway
Verified
  • Other industries
  • Allentown, Pennsylvania
  • 1,001-5,000 Employees
  • Online Review
  • Verified

A fintech company has hired Selleo to develop a self-service kiosk for sports and entertainment venues and a web admin portal for merchants. The team works on front- and backend development.

SaaS Platform Revamp for Healthcare Company

  • Custom Software Development
  • Confidential
  • Jan. - Aug. 2023
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"They are very agile, flexible, and accommodating to our needs."

Aug 25, 2023
President & CEO, Healthcare Company
Anonymous
Verified
  • Other industries
  • Newark, New Jersey
  • 11-50 Employees
  • Online Review
  • Verified

A healthcare company partnered with Selleo to revamp their existing SaaS platform within a specific budget. The team was tasked with redesigning the platform's UI/UX and expanding its functionality.

App Design for App Development Company

  • Custom Software Development
  • $10,000 to $49,999
  • Jan. 2021 - Jan. 2022
0.5
Quality
0.5
Schedule
0.5
Cost
0.5
Willing to Refer
0.5

"The end result was terrible."

Jan 9, 2023
Co-Founder, App Development Company
Anonymous
Verified
  • Other industries
  • Sydney, Australia
  • 11-50 Employees
  • Online Review
  • Verified

Selleo redesigned an app for an app development company. They were tasked with recreating widgets and designing the UX.

Financial App Development for Fintech Company

  • IT Staff Augmentation Mobile App Development
  • $50,000 to $199,999
  • May 2021 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
3.5
Willing to Refer
5.0

"The team is fully integrated into our own workflows and processes."

Aug 8, 2022
Co-Founder, Fintech Company
Anonymous
Verified
  • Financial services
  • Wilmington, Delaware
  • 11-50 Employees
  • Online Review
  • Verified

A fintech company was looking to enhance their frontend capabilities for their financing software, so they engaged with Selleo to supplement their staff of mobile app developers.

SaaS Dev. for a Software Provider

  • Custom Software Development
  • $50,000 to $199,999
  • June 2017 - Ongoing
4.5
Quality
4.0
Schedule
5.0
Cost
4.0
Willing to Refer
4.0

“We can now ship our products faster and demonstrate our ability to execute quickly.”

Jul 31, 2018
CTO, Alyne
Manuel Reil
Verified
  • Information technology
  • Germany
  • 11-50 Employees
  • Online Review
  • Verified

Selleo provided expertise on improving the framework for a SaaS solution. This included providing insight on API and UI.

Showing 31-37 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

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