Senior Front-end Developer

Publishing, media, mobile, advertisement, technology, Barcelona, start-up: all-in-one!

Job details

  • Full-time
  • map markerBarcelona, ES
  • globeRelocation paid
  • cardRequires Work Permit
    Requires that you're a citizen or have a valid work permit / visa sponsorship to work in the country in which this position is based.
  • routeSenior
  • routeRequired language: English
  • Front-end Developer
  • tagMust Have: JavaScriptOther Required: CSS, HTML, React, Vue.jsNice to Have: Google Analytics, Java

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We are Marfeel, one of the hottest European start-up companies, and we are looking for a Front-end Developer to join our team. Our headquarters are based in sunny Barcelona and our office has a huge terrace to enjoy!

This is you:

  • Your life begins and ends with a slash
  • You feel like you have a mission, not just a task, and you write testable Front-end code in JavaScript and HTML/CSS
  • You live for iterative development and a day without pushing code makes you sad
  • You’re not afraid to get your hand dirty and crack open an existing code base and bend it to your will
  • “Self Starter” is your middle name. You can take or come up with a high-level idea and run with it until it's done
  • You have a real understanding of building web products that work at massive scale
  • You can’t imagine your life without a whiteboard, open-source boards and definitely CODE
  • You know the importance of being part of a universe where all the departments need each other and work together for a mutual goal. So, your communication shows both tech and functional command of what you’re doing
  • As a software craftsperson, you will advocate and practice pair-programming, test-driven development, refactoring, collective-code ownership, and continuous integration
  • You care about online news and user experience
  • You have lots of stamina and you get bored if you have nothing to do
  • You are hands-on and proactive
  • You're eternally curious and hungry for knowledge

If this sounds like you and you are up for the challenge, sit down and let us introduce Marfeel to you:

Main requirements

  • At least 4 years experience building software that works at web scale
  • You can solve technical problems equally well with OO, DOM oriented, or functional JavaScript
  • 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 demonstrable experience with cross-browser JavaScript and CSS development
  • You have experience with client-side site development in JavaScript
  • You have a solid understanding of HTML5 tags - functions and intent
  • You are an international team player
  • You are fluent in English (this is a must)

Nice to have

  • Experience with Webpack, SASS and Jasmine
  • Knowledge of React and/or Vue.js
  • If you also have experience in Java that will be great
  • Experience with more recent web technologies (i.e. localStorage, geolocation, CSS transitions and transformations)
  • #perfMatters
  • Experience with Google Analytics
  • Experience with AdServing
  • Experience with various AWS services and understand the challenges of deploying large applications in the cloud


  • Talented, international and multicultural team (more than 30 nationalities and more than 8 languages). You will not get lost in translation
  • Flexible working hours
  • Free coffee, tea, juices and soft drinks
  • Sunny office terrace
  • Ping-pong, Mario Kart and foosball tournaments
  • Free language and yoga classes
  • Team building events
  • Training, books and all you need to feel the empowerment
  • Beach: 30 minutes walking
  • Transport, restaurant and kindergarten tickets
  • And, Referral Bonus if you bring other talented people like you

Apply now

Sign up to apply

Or sign up to refer and earn a reward of €300