Frontend Web Developer

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.

We are looking for a proven engineer to join our growing Front End team. As  Front End Engineer, you’ll own the 21 Buttons web app, and be responsible for shaping key technical decisions as we scale to millions of users. 

You will work on the development of our Front End infrastructure from the ground up, and play a fundamental role in defining and developing our technologies and internal processes as we continue to grow!


Design and develop the web app with best practices as we scale our platform and team;

Being involved in technical site audits, web analytics, setup A/B tests and enhance search engine optimization;

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;

Have a passion for building software development processes and engineering culture;

Experience building Web Apps with React + Redux;

Knowledge of unit testing frameworks, including Mocha, Chai, or Jest;

Knowledge of end-to-end testing frameworks, including Selenium or Cypress;

Well-versed in HMTL5/CSS3 for responsive designs (mobile first);

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

Understanding of design patterns and architectures;

ES6 or TypeScript;

Experience building Progressive Web Apps (PWA).

What else is important for you to know?

  • Talented and collaborative team who will both support and challenge you;
  • 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