Front-End Developers For Hire - Front-End Development Outsourcing

Engage front-end developers
Design and build great apps

Scale your front-end development with experts
in UX/UI, JavaScript, React.js, Ember.js

Join 230+ tech leaders who have built apps
with our full-stack outsourcing company

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
Simplaex GmbH is a Berlin-based company which operates a digital data platform powered by an advanced Artificial Intelligence user classification technology.
Jan Thomas
Selleo have allowed us to quickly scale our existing teams with additional developers, often within a couple of weeks. They're a pleasure to work with and have always delivered outstanding quality!
Jan Thomas
Director of Product, Simplaex, Berlin
Revealing audiences across the programmatic value chain
Digital Marketing Platform
Revealing audiences across the programmatic value chain
The AI-powered solution allows game marketers to generate revenue from current and new players. Advertisers leverage Simplaex trusted partnerships with over 1,000 global mobile and desktop publishers. The marketers can follow consumers’ digital footprints in real-time and turn them into loyal customers.

Our Clients' applications were featured in

Hire experienced Front-End developers

Michal Czyż
Michal Czyż


  • Speaker and active member of Ember.js and JavaScript communities in Germany and Poland
  • Trainer and mentor for software development teams from all over the globe
  • Vice President of Mikstura.IT Foundation which helped hundreds of people to expand their IT career
Tomasz Bąk
Tomasz Bąk

Lead Developer

  • Architected frontend applications for cloud-based solutions used by finance institutions, global ad publishers and major brands
  • Helped customer meet important product launch by refactoring complex state management system developed for months in 2 weeks
  • Organizer of Meet.js Bielsko-Biala Meetup (190+ 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 development of applications which were featured in Mashable, Forbs, TechCrunch, WIRED or BusinessInsider
  • Lead Developer of business process management application used by Fortune 500 companies

Years in business


Designers & developers


Software projects

Looking for experienced developers?

Let's get in touch!