JavaScript / Java Full Stack Developer

Barcelona, Full time

Who we are:


Marfeel is a publishing platform that that revolutionizes the way publishers create, optimize and monetize mobile websites. Over 850 publishers, including USAToday, Euronews, and El Confidencial use Marfeel to serve a billion mobile sessions, every month. 

We take a Technology-First approach and have a commitment to developing new tools for digital publishers to reach their audience. Our innovative technology, including PWAs, SEO and engagement tools, monetization and experimentation makes us proud of what we can offer to our clients: faster speeds, greater performance, and worldwide distribution.

Our team now has more than 170 members, made up of over 30 different nationalities. With headquarters in Barcelona and offices in New York and Bogotá, our people and our diversity are the reason behind our world-class product, and we’re still growing.

If you feel like an outstanding JavaScript / Java Full-Stack Developer, be part of Marfeel!


This is you:

  • You treat your work like a mission, not just a series of tasks

  • You live for iterative development; a day without pushing code makes you sad

  • You’re not afraid to crack open an existing code base and bend it to your will

  • You were born a self-starter; you can take or come up with a high-level idea and run with it until it's done

  • You have lots of stamina and get bored if you've got nothing to do

  • You're eternally curious and hungry for knowledge

  • You're a team player, and know the importance of working with other departments, technical or not, in achieving goals

  • You aren't afraid to get your hands dirty

  • You're experienced in the art of building web products that work at massive scale

  • You're not a programmer, you're a craftsman/craftswoman

  • You love these things: pair-programming, test-driven development, refactoring, collective-code ownership, continuous integration

Main requirements:

  • Can solve technical problems equally well with OO, DOM oriented, or functional JS

  • Ability to create an interface using Java, JavaScript, HTML and CSS

  • Ability to develop server & client side in a end-to-end

  • 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.)

  • More than 2 years of experience building software that works at web scale

  • Demonstrable experience with cross-browser JS and CSS development

  • Solid understanding of HTML5 tags (functions and intent)

  • Experience developing web architectures with Java and the Spring framework

  • You have strong experience in REST, Spring IoC, Spring MVC, Spring Data.

  • You are familiar with parallel code execution.

  • You are well versed in clean code and practices such as code by intent.

  • Familiarity with testing libraries like JUnit, Mockito and integration testing

 Nice to have:

  • Experience with RequireJS, SASS and Jasmine

  • ReactJS

  • AngularJS

  • Experience with AdServing

  • Spring Security

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

  • Deployment technologies

  • Nginx, Tomcat, MongoDB, Quartz

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

  • Experience with GoogleAnalytics

  • Experience with AdServing

  • Experience with various AWS services and understand the challenges of deploying large applications in the cloud

  • #perfMatters


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, all you need to feel the empowerment.

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

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