Senior Software Engineer, Backend

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.

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

21 Buttons offer the perfect environment that mixes a great team, a challenge in terms of scalability and cool technologies to work with - Jairo Vadillo, Backend Lead

You’ll be joining us in our transition from monolith to microservices architecture designing and developing APIs, providing solutions and implementing them all. As a high-growth organization, we need an architecture that scales in a big way.


  • BS/BA in Computer Science or similar
  • Extensive experience in any OO language but mainly in Python 
  • Experience working on an agile environment (Scrum / Kanban).
  • You have a wealth of extensive experience as a backend engineer 
  • A great coder that cares about good coding practices and principles (Clean Code, Solid Principles)
  • Unit testing, TDD,...
  • You are an extremely self-motivated person that loves learning
  • Passion to try new technologies 
  • You take ownership and feel responsible for the product as a whole. 
  • You don’t mind getting your hands dirty and work with legacy code.

Nice to have:

  • Worked on high-traffic websites.
  • Experience with one or more of this technologies: Python, Relational Databases, Django, ElasticSearch, Async Frameworks or Redis

If this sounds like you, we´d love to chat!

What else is important for you to know?

Location: Barcelona, Spain

  • We do not sponsor working visas

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