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Senior Frontend Developer - React

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

Marfeel helps publishers of all sizes to create, optimize and monetize their mobile websites. We have been named 16th fastest-growing European company of 2018, by The Financial Times, but we still think we have a long way to go to where we want to be.

We are looking for talented Front-end Engineers to join our Core product team and be part of a multicultural and talented Engineering team of over 70 developers, in sunny Barcelona.

You will be part of a team who owns the performance and the architecture of our front-end ecosystem that supports over 15 million visits a day. Currently we are in the process of redefining our architecture in React. Fancy helping us?


You will:

  • Be part of a multicultural and talented company, consisting of 28 nationalities.

  • Help us define and implement our new front-end architecture

  • Have a say in what libraries, tools and technologies we use for front-end development

  • Join a fun and dynamic Core product team that follows Agile practices.

  • Have opportunity and support to grow and develop your career further

  • Be able to help us shape our rapidly growing Engineering department


What the team is looking for:

  • You have proven experience in delivering end-to-end features in ReactJS and other modern Javascript front-end technologies for mobile applications

  • You have worked with Styled Components and style sheet languages, such as SASS

  • You know different ways of managing application state in the front-end

  • 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, server side rendering etc.)

  • You are familiar with modern development and build tools such as git, npm, babel, and webpack

  • You have experience working in cross-functional collaborative teams, following Agile best practices

  • You are comfortable contributing to and leading technical and/or architectural discussions

  • You take ownership of your and your team's code quality. Writing tests is in your second nature, and you have a broad understanding of UI testing techniques

  • You continually strive to share your knowledge around best code practices

  • You have high emotional intelligence and finding it easy to empathise with others

  • You don’t take yourself too seriously and enjoy a few jokes now and then

The team will be further impressed with:

  • You have experience with developing Progressive web applications, service workers, push notifications

  • You know how to analyse and optimise the performance of a front-end application

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

  • You are an active contributor to a front-end community

  • You have worked with Jenkins and familiar with CI and CD release cycles

  • You have experience with backend languages and frameworks such as NodeJS, Java, Python or any others

  • You are familiar with #perfMatters, VueJS, Google Analytics, AdServing, Linters

As part of Marfeel, you will also have:

  • Flexible working-time

  • Free coffee, tea, juices and other commodities

  • Beer tap in the kitchen

  • 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

A little bit more about us:


Marfeel is one of the hottest European start-up companies in the mobile ad-tech world.

We have been named:

  • 16th out of Europe’s 1000 fastest-growing companies of 2018, by The Financial Times

  • Nº 1 Fastest Growing Marketing and Advertising Private Company in Spain in 2017, by Inc.5000

  • Top 100 Startups in 2015, by Wired Magazine

We are highly recommended by Google for our mobile design solution, and together with our partners, we have over 6 billion worldwide readers and over 20 billion page views.

Certified Google Publishing Partner

Certified Facebook Instant Articles Official Partner


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