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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

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 with strong value for cost, frequently delivering high-quality solutions within client budgets. Projects ranged from $20,000 to $600,000, with teams of 2 to 15 members, reflecting flexibility and a commitment to client needs.

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

  • Cost-Effectiveness and Value for Investment

    Selleo is often seen as offering good value for money, with competitive pricing and a high level of service quality. Clients appreciate the cost-effectiveness of their solutions.

  • Strong Technical Expertise in Various Technologies

    Selleo is praised for its technical proficiency in a range of technologies including Ruby on Rails, React, and JavaScript. Clients appreciate their ability to handle complex projects, leveraging modern tools like AWS, ThreeJS, and D3 for robust solutions.

  • Positive Impact on Client Business Growth

    Selleo's contributions have positively impacted client business growth, enabling successful product launches and increased market presence, which clients attribute to Selleo's effective solutions.

  • Proactive and Innovative Approach

    Selleo is recognized for its proactive approach to problem-solving and innovation. Clients value their input and suggestions for improving projects and processes, which enhances the overall outcome.

  • Room for Improvement in Quality Assurance

    Some clients suggest improvements in Selleo's quality assurance processes, specifically in feature checks and bug testing before delivery. This indicates a potential area for Selleo to enhance service quality.

  • Impressive Responsiveness and Flexibility

    Selleo is noted for its responsiveness and adaptability. Clients appreciate their willingness to adjust to changing requirements and provide ongoing support and collaboration, making them a reliable partner.

Selleo Reviews

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Services
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Industry
Location

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.

App Dev for Community & Social Organization

  • Web Development
  • $50,000 to $199,999
  • Jan. 2020 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"They have strong leadership, offer a good value, and they're flexible."

Apr 29, 2020
CEO, Better Off Social
Chris Mitchell
Verified
  • Arts, entertainment & music
  • New York City, New York
  • 1-10 Employees
  • Online Review
  • Verified

Selleo developed a web app; they set up the architecture and created the solution, which involved DevOps.

Development for a Property Management Platform

  • Custom Software Development
  • React Native React
  • $200,000 to $999,999
  • Mar. 2017 - Ongoing
5.0
Quality
5.0
Schedule
4.5
Cost
4.5
Willing to Refer
5.0

"We appreciate how invested Selleo is in our product."

Dec 4, 2019
CTO & Co-Founder, Breezeway
Nate Oaks
Verified
  • Other industries
  • Boston, Massachusetts
  • 11-50 Employees
  • Phone Interview
  • Verified

Supplementing resources in-house, the team at Selleo provides development support for a software startup. The team developed and designed a React web platform and native mobile application.

Development for a Commerce Company

  • Custom Software Development
  • Ruby on Rails JavaScript
  • $200,000 to $999,999
  • June 2016 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

“After three years with the team, we still enjoy working together.”

Aug 21, 2019
Founder, BrandActif
Anonymous
Verified
  • Other industries
  • United Kingdom
  • 1-10 Employees
  • Phone Interview
  • Verified

Selleo developed a custom platform for a visual commerce company. Their team created a web app and an API using Ruby on Rails and Javascript.

Near-Shore Development Services for SaaS Collaboration Tool

  • Web Development
  • $200,000 to $999,999
  • Jan. 2015 - Ongoing
5.0
Quality
4.5
Schedule
4.5
Cost
4.5
Willing to Refer
5.0

"...they are actively working together with us to make both our processes and software better and better."

Jul 30, 2019
Founder, 9TEAMS
Piet Neirinck
Verified
  • Other industries
  • Belgium
  • 1-10 Employees
  • Online Review
  • Verified

Working in tandem with the internal team, Selleo has developed a SaaS platform using EmberJS and Elixir. They've architected the solution, built out features, and designed landing pages/marketing collateral. 

Development for an eSports Platform

  • Custom Software Development
  • Ruby on Rails React
  • $200,000 to $999,999
  • Jan. 2016 - Ongoing
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"We value their opinion, and they respond by going the extra mile to optimize our product." 

Feb 19, 2019
CPO, Battleriff Gaming AB
Tom Smith
Verified
  • Other industries
  • Sweden
  • 1-10 Employees
  • Phone Interview
  • Verified

Selleo developed an e-sports solution using React and Ruby on Rails. They helped implement the platform’s design and provided GDPR data consulting. They now act as an ongoing development partner.

Development for a Startup Incubator

  • Custom Software Development
  • Python React
  • $50,000 to $199,999
  • Aug. 2018 - Ongoing
4.5
Quality
5.0
Schedule
5.0
Cost
4.5
Willing to Refer
4.5

“Selleo holds themselves to a high standard that I’ve rarely seen in agencies.”

Jan 18, 2019
Managing Director, WATTx
Anonymous
Verified
  • Other industries
  • Berlin, Germany
  • 11-50 Employees
  • Phone Interview
  • Verified

Selleo developed a backend and data pipeline using Python to manage an array of data sources from a third-party client’s external system. They also built a React app to host a customer dashboard on mobile.

Development for a Moving Service

  • Custom Software Development
  • Ruby on Rails React
  • $50,000 to $199,999
  • Feb. - July 2017
4.0
Quality
4.0
Schedule
5.0
Cost
4.0
Willing to Refer
4.0

“With Selleo, the entire development process was quite open and lean.”

Jan 16, 2019
Chief Digital Officer, Movinga
Dennis Gneuss
Verified
  • Other industries
  • Berlin, Germany
  • 201-500 Employees
  • Phone Interview
  • Verified

Selleo assisted with frontend and backend development for an online moving company’s digital system. They worked with Ruby on Rails and React.js technology to update the backend and make changes to the UI.

Software Development for Startup Venture Fund

  • Custom Software Development
  • Ruby on Rails React
  • $200,000 to $999,999
  • Apr. 2017 - Ongoing
4.5
Quality
4.0
Schedule
4.0
Cost
3.0
Willing to Refer
5.0

“The products have minimal bugs, and I’m happy with the quality of their work.”

Nov 27, 2018
Product Lead, Venture Fund
Anonymous
Verified
  • Financial services
  • Phone Interview
  • Verified

Selleo augments the existing dev team to work on various software projects. They’re currently building two web-based products, focusing on the frontend. They also provide support for the backend developers.

Web Development for VPN Service Provider

  • Web Development
  • Ruby on Rails
  • Confidential
  • Jan. 2017 - July 2018
5.0
Quality
5.0
Schedule
n/a
Cost
4.0
Willing to Refer
5.0

“Selleo is profoundly talented in the Ruby on Rails area.”

Oct 31, 2018
CTO, ZenGuard
Jörn Stampehl
Verified
  • Information technology
  • Berlin, Germany
  • 11-50 Employees
  • Phone Interview
  • Verified

Selleo provided development staff augmentation to help increase a VPN service provider’s pace and meet target deadlines. Based on a code review, they gave input and made updates to enhance the UX of the API.

Showing 11-20 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.

Premier Verified means Clutch independently confirmed Selleo is a legally registered business,
financially sound (Creditsafe: Low Risk), and backed by 36 verified client reviews averaging 4.8 stars.

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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