iOS 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: 

  • Design, develop, test, deploy, maintain and improve our iOS app;

  • Optimize mobile applications on the iOS platform;

  • Manage individual project priorities, deadlines, and deliverables.


  • Degree in Computer Science, Computer Engineering, related technical field or equivalent practical experience;

  • Software development experience in Objective-C and Swift using iOS;

  • Experience working with Restful APIs to integrate mobile applications to server side systems;

  • Working proficiency and communication skills in verbal and written English;

  • Understanding of recommended design patterns and architectures;

  • Experience implementing complex architectures such as VIPER, MVVM;

  • Experience with functional reactive programming such as ReactiveCocoa;

  • Familiarity with TDD and Continuous Integration

What else is important for you to know?

  • Location: Barcelona, Spain (we do not sponsor work 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