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Senior frontend- Heisenberg team

Product – Bcn, Bcn
Department Product
Employment Type Full-time
Minimum Experience Experienced

Who are we:

Be part of Marfeel, one of the hottest European start-up companies in the mobile ad-tech world. Named as Wired Magazine’s 2015 Top 100 Startups, Inc.5000 nº 1 Fastest Growing Marketing and Advertising Private Company in Spain in 2017, and 16th out of Europe’s 1000 fastest-growing companies by the Financial Times in 2018. We are recommended at the very top by Google itself for our mobile design solution. Together with our partners, we have over 6 billion worldwide readers and over 20 billion page views. Our headquarters are based in sunny Barcelona. 

Certified Google Publishing Partner

Certified Facebook Instant Articles Official Partner


  • You can solve technical problems equally well with OO, DOM oriented, or functional JS.

  • You have the ability to create an interface using JavaScript, HTML and CSS.

  • You have a solid understanding of the web technology stack (i.e. headers, cookies, cross-domain restrictions, https, caching, optimization opportunities, hardware acceleration, junk and scroll performance, etc.).

  • You have >2 years experience building software that works at web scale.

  • You have demonstrable experience with cross-browser JS and CSS development.

  • You have experience with client-side site development in JS.

  • You have a solid understanding of HTML5 tags - functions and intent.


We will be impressed if:

  • You have experience with Webpack, SASS and Jasmine.

  • ReactJS.

  • #perfMatters.

  • Experience with more recent web technologies (i.e. localStorage, geolocation, CSS transitions and transformations).

  • Experience with Google Analytics.

  • Experience with AdServing.

  • You have experience with various AWS services and understand the challenges of deploying large applications in the cloud.

  • Vue.js

  • You have some experience in Java.


Your role in the team:

You will be part of the Heisenberg team, responsible for growing our client’s audience! It’s in your hands to increase Marfeel’s numbers with your actions and decisions. There is nothing more engaging than seeing how your work directly impacts the bottom line.

So, if you feel powerful enough to lead the front-end development in the team, give a hand if needed in the backend developing in Java, participate actively in developing new ideas to gain more audience and never get bored... join the Heisenberg team!

This will be you as part of the Marfeel team:

  • Working on an international, multicultural and talented team and enjoying our sunny terrace.

  • We have more than 27 nationalities so you will not get lost in translation.

  • Flexible working time.

  • Free commodities (coffee, tea, juices, etc).

  • Ping-pong, Mario Kart and foosball tournaments.

  • Free language and yoga classes

  • Team building events!

  • Transport, restaurant and kindergarten tickets.

  • Training, books and all you need to feel empowered.

  • And a Referral Bonus if you bring other talented people like you.

Thank You
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  • Location
    Bcn, Bcn
  • Department
  • Employment Type
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