• 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%
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

  • Positive Experiences with Team Integration

    Clients appreciate Selleo's ability to integrate seamlessly with internal teams, forming a cohesive unit that enhances productivity and project success.

  • 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.

  • Positive Client Relationships and Trust

    Clients value the trust and strong relationships built with Selleo, noting their dedication, reliability, and open communication as key factors in a successful partnership.

  • High Client Satisfaction with UX/UI Design

    Selleo's UX/UI design capabilities are highly regarded, with clients praising the user-friendly and visually appealing interfaces that enhance the overall user experience.

  • Effective Project Management and Communication

    Most clients commend Selleo for their organized project management and clear communication. They use Agile methodologies, maintain regular meetings, and ensure transparency, which helps them meet deadlines and adapt to client needs.

  • 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.

Selleo Reviews

Submit a Review
All Filters

0 selected

Sort by
Services
Project Cost
Industry
Location

Conference Management Platform for Training Company

  • Web Development
  • $10,000 to $49,999
  • Feb. 2014 - Mar. 2015
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"[W]ith Selleo’s professional approach, the work was easy and even enjoyable."

May 23, 2017
Vice Chairman of Advisory Board, Training Company
Anonymous
Verified
  • Other industries
  • Warsaw, Poland
  • 1-10 Employees
  • Online Review
  • Verified

Selleo developed an event-focused web CMS solution with corresponding mobile apps (iOS, Android, and Windows Phone), incorporating user behavior analytics and feedback features to boost participation.

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.

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.

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

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

Sinon Tech Pvt Ltd

(1)
Sinon Tech Pvt Ltd Logotype

Sumeet Shah

Smarketing AS

(1)
Smarketing AS Logotype

Linda Jensen

Additional Connections

(1)