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Your Top React.js
Developers Team

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With development expertise gained on over 150 international software projects

our developers and teams enable CEOs, CTOs, VPs of Engineering and Product Owners in startups and SMEs to design and craft quality software solutions. In doing so, we either augment clients’ in-house teams or deliver complete turnkey projects.

Efficient Communication

You communicate directly with the developers, choose the tools and assign tasks. We work from one office so you can easily integrate our developers into your existing team structures and processes. For efficient kick-start we can visit you or you can join the team at our office.

Developers Engagement

Your dedicated development team work for you full-time and act as if they were part of the in-house team. Following agile best practices we form personal connections and strong working relationships. We care about your success, show initiative and a proactive approach to problem-solving.

High Quality Results

We turn the specifications of your features into business-ready software that meets the highest standards. Code quality is guaranteed by automated tests and peer reviews. You leverage our internal experts' skills and industry expertise to speed up the product time to market.


Client satisfaction

surveys reveal the average score for product and service quality in the last two years have been 85% and 90.2% respectively. We keep working to go beyond that.

I look for 5 key things in a software development partner: great programmers, consistent quality, excellent value, a responsive management team, and a fun experience. Selleo is a solid 5 out of 5 by my standards.

Myron WeberMyron WeberCEO at Northwood Advisors
Studentvikarie Sverige AB is an authorized staffing company providing a web and mobile platform with temporary edu job vacancies for students.
Henrik Lindberg
I've found an exceptional development partner in Selleo. Thanks to their skill, adaptiveness and integrity, I consider them dear and full members of my team for both backend, web, and React Native development.
Henrik Lindberg
CTO, Studentvikarie, Sweden
Streamlining job search and recruitment processes on a platform
Changing the future of education
Streamlining job search and recruitment processes on a platform
This multi-sided SaaS temporary employment service simplifies the recruitment process in schools and universities. Students looking for a part-time job in education can browse through hundreds of offers. Schools and job agencies can in turn target employees with location based filters and easy scheduling. With more than 100,000 lessons in 2017, Studentivkarie was nominated as the Social Entrepreneur of the Year.

Hire experienced React.js developers

Tomasz Bąk
Tomasz Bąk

Lead Developer

  • Architected frontend applications for cloud-based solutions used by finance institutions, global ad publishers and major brands
  • Helped the customer meet important product launch by refactoring complex state management system developed for months in 2 weeks
  • The Organizer of Meet.js Bielsko-Biala Meetup (150+ members), conducted over 40 workshops and presentations on React, Angular, JSON API and GraphQL
Szymon Kieloch
Szymon Kieloch

Lead Developer

  • Helped to develop the most advanced Artificial Intelligence-powered user classification technology
  • Augmented the development of applications which were featured in Mashable, Forbs, TechCrunch, WIRED or BusinessInsider
  • A Lead Developer of business process management application used by Fortune 500 companies
Tomasz Noworyta
Tomasz Noworyta

Lead Developer

  • The Architect and Lead Developer of data visualization and collection solution used by Vodafone Foundation, WWF, CARE, UNHCR or Red Cross
  • The Team Leader with over 10 years of experience in development of global software outsourcing projects
  • A Database Tech Lead and optimization magician collaborating directly with product owners

Years in business


Designers & developers


Software projects

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