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Senior Java Backend Engineer in Barcelona


Est. Salary
30,000 - €45,000
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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 6 million users come to get inspired by their favourite influencers and friends’ ready-to-shop content. With over 10 million outfits shared, 21 Buttons allows anyone no matter their audience size to earn revenue from sharing their personal style.

Launched in our first country just over 2 years ago and now with more than 3000 influencers across the UK, Germany, Italy and Spain, we’re growing faster than ever and now are keen to find someone as passionate as we are about our project to join the team at this exciting stage of our company’s journey of propelling our ambition of Stateside expansion.

Although our focus is fashion, 21 Buttons is an engineering company. 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 & Technology 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 be part of our Retention team. This team handles our push notifications algorithms and scheduling as well as the logic for the purchases (purchase detection, fraud validation). As part of this team you'll ensure robustness, performance and failure characteristics of the system.

Work closely with the product team in creating roadmaps and timelines for product development.


  • BS degree in Computer Science, similar technical field of study or equivalent practical experience.
  • Strong OOP and software design skills.
  • Extensive experience in Java and other OO languages.
  • Passionate about developing high-quality enterprise software.
  • Happy to take an active role in supporting the business needs.

Bonus points

  • Previous experience with DDD is a strong bonus point.
  • Clean code practitioner!
  • Experience working on an agile environment.

What else is important for you to know?

  • Market competitive salary.
  • This position is full-time and based in Barcelona.

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


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