Android Software Engineer, Mobile Applications

Job description

21 Buttons is changing the fashion game - through technology and talent. It has become the leading fashion social network in Europe where more than 10 million users come to get inspired by their favorite influencers and friends’ ready-to-shop content. With over 20 million outfits shared globally, 21 Buttons allows anyone, no matter their audience size, to earn revenue from sharing their personal style.

Having launched our first country just over 3 years ago, and now with more than 4,000 influencers across the UK, Germany, Italy, France, Spain and the US, we are backed by several top-tier European VCs and growing faster than ever from our offices in Barcelona, New York and London.

We are looking for talented people with a broad set of technical skills who are ready to tackle some of the technology's greatest challenges and make an impact.


Our Engineering team kick-ass in the development of an innovative product that will be used by (hope!) billions of users.

If you’re a curious and collaborative visionary, someone excited about tackling the hard problems in technology, this is the place to be!

You will: 

  • Build large scale mobile apps for Android devices.

  • Design, develop, test, deploy our Android app.

  • Develop cutting edge technologies using the Android potential: Kotlin; RXJava; Dagger2; Android Architecture Components; Flow.

  • Ensure robustness, performance and failure-proof characteristics of the system.

  • Manage individual project priorities, deadlines, and deliverables.


  • At least 1 year working with Android

  • Experience working with RESTful APIs

  • Experience in Agile environments

  • Experience with Dagger

  • Experience with RxJava

  • Experience with Retrofit

  • Experience designing and implementing clean code architectures (Clean and MVP)

  • Experience writing tests

  • Any of these technologies would be a plus: Espresso; Kotlin.

What else is important for you to know?

  • Location: Barcelona, Spain (we do not sponsor working visas)

  • You will report to the CTO

Feel free to get to know us a bit more! Here are a few places you can visit to learn more about what our tech team is doing:


We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status