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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%
Certified in:
Custom Software Development React NodeJS

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 good value for cost, with many clients noting their budget-friendly rates. Project costs range from $10,000 to over $600,000. Clients appreciate their responsiveness and quality, although some suggest improvements in bug testing and project management.

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

  • Commitment to Continuous Improvement

    Selleo is noted for their commitment to continuous improvement and openness to feedback. They actively work with clients to enhance both processes and software quality.

  • Expertise in Custom Software Development

    Selleo has been praised for developing custom web and software applications tailored to specific business needs. Clients from diverse industries like financial services, SaaS, and healthcare appreciated the personalized solutions that addressed unique challenges.

  • Positive Client Feedback and Outcomes

    Most clients reported positive feedback and successful outcomes from projects with Selleo. Their solutions have led to improved operational efficiencies and user experiences across various platforms.

  • Impressive Technical Knowledge

    Clients frequently praised Selleo for their technical acumen, particularly in areas like Ruby on Rails, React.js, and JavaScript. Their ability to produce reliable, maintainable code was highly valued.

  • Areas for Improvement in Quality Checks

    Some clients noted the need for more robust quality checks and better bug testing before presenting features. This suggests an area where Selleo could improve its service delivery.

  • Seamless Integration with Client Teams

    Selleo's ability to seamlessly integrate with client teams and work in tandem on projects is highlighted as a key strength, enhancing collaboration and project success.

Selleo Reviews

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

  • Custom Software Development UX/UI Design
  • Usability Testing User Research UX Strategy
  • 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 NextJS Ruby on Rails JavaScript React
  • 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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