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 (Ruby on Rails, Elixir, NodeJS, ReactJS, React Native, EmberJS).
Extend your in-house team
Whenever you want to handle a new project, deliver essential features or need a staff with specialized skills or industry expertise, our full-stack developers help you to increase overall productivity. We work in collocated agile teams crafting web and mobile applications with an entrepreneurial sense of ownership.
Embrace tech stack complexity
Our expert developers have not only the current capabilities you need but also the ability to build new ones rapidly. With the vast diversity of skills required and partnership with other specialized companies, we can deliver even the most technologically challenging software solutions.
Industry Expertise
Through the years we have gathered a broad spectrum of specialization in the development of custom SaaS and cloud-based business process management tools, digital dashboards, LMS and e-learning services, AdTech and marketing platforms, data analytics and processing solutions. We enable clients to efficiently optimize and innovate processes, products, and business ventures by developing single-page applications, designing microservices architecture and crafting web and mobile applications.
Focus Areas
Service Focus
- Software Development
- Web Designing (UI/UX)
- Web Development
- E-commerce Development
- DevOps
Client Focus
- Medium Business
- Small Business
Industry Focus
- Business Services
- Advertising & Marketing
- Education
Selleo Labs Clients & Portfolios





















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Selleo Labs Reviews
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Exceptional Software Development by Selleo
Review Summary
What was the project name that you have worked with Selleo Labs?
LunchAssist PRO Learning Management System
Describe your project in brief
Selleo helped us rebuild our LunchAssist PRO Learning Management System and landing pages/website for school nutrition. We had created a makeshift system with a template website builder, but it was not customized for our industry. Selleo worked with us to design and built a web application/software from the ground up that is tailor made to our specific industry needs, including: Aclearer interface, a knowledge library, custom quizzes, complex compliance reports, user permissions, and seamless user migration. Training video player that is accessible within a couple of clicks of logging in. It makes training convenient for the school nutrition professionals we serve. It's like Netflix for school nutrition! An interactive quiz functionality ensures accessibility for all staff and supports tracking for USDA compliance purposes. The modern design caters to users of all ages.
What is it about the company that you appreciate the most?
Responsiveness to feedback, frequent communication, innovative and skilled UX and UI design, high-quality code with very few bugs, and quick response rate when bug fixes were needed. Great project management and multiple checkpoints for customer care and attention.
What was it about the company that you didn't like which they should do better?
The only downside is the time zone differences, but that is a result of our global team (based in Australia and USA) working with the team at Selleo in Poland. They were great about working around our time zones, but there is only so much you can do between three continents.
Task: Develop MVP. Outcome: MVP delivered on time with quality above expectiations
Review Summary
What is it about the company that you appreciate the most?
Great communication
A great addition to our existing development teams!
Review Summary
They have been and continue to supply us with high quality engineers that allow us to scale our technology team as and when we need, whilst recruiting internally.
The engineers from Selleo have integrated well within our existing engineering teams and from very early on have been able to contribute to our codebase.
We would not hesitate to recommend them to others.

Strong Software Development Partner
Review Summary

A+ Team & Service
Review Summary

Vue.js web development and UI/UX design
Review Summary

Incredible value, saved our project
Review Summary
After an absolutely terrible experience with another Polish firm, we interviewed all the top Polish Rails agencies.
Selleo was the top. From the first meeting they had a developer there who was listening to what we were saying - it wasn't the standard 'yes' salesmen/women that you would normally get. Instead of telling us exactly what we wanted to hear while staying vague, they dove into the problem and invested time figuring out how we'd solve it, what the problems were, etc.
Selleo wasn't the cheapest, wasn't the most expensive, but it was by far the best value. They've continued to work with us on different issues, and with the pandemic, they helped us pivot and were extremely flexible.
After a number of bad experiences, we're been thrilled with the Selleo team.
What is it about the company that you appreciate the most?
Leadership, honest, involvement in getting best possible project
Fantastic development partner
Review Summary

Working with Selleo on Web Application Development
Review Summary
What is it about the company that you appreciate the most?
Team engagement, transparency, access to resources, quality of code, eagerness to deliver value.

Great colaboration
Review Summary

Excellent reliability and high trust relationship
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Great team!
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Great work!
Review Summary

Working with Selleo team is a great experience and fun
Review Summary
They don’t need to be managed externally thus saving a lot of time for us. From their communication to development, Selleo represents a top-level company.

Very trustworthy and flexible
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