Senior Java Engineer

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

Job details

  • Full-time
  • map markerBarcelona, ES
  • 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

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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.

We are looking for a Senior Java Engineer to join our core product team, responsible for the Back-end system infrastructure which gives service to 700 million worldwide monthly readers. We are continually evolving our architecture and we love tackling the challenges that this involves, such as high concurrency and performance, always keeping our focus on quality and coding standards.

This is what you will do:

  • Work on challenging developments, involving high concurrency and affecting millions of users
  • Use up-to-date technologies like modern versions of Java and Spring, Docker, Kubernetes, Microservices…
  • Work with automated environments with continuous delivery based on Jenkins and AWS, instrumented deployments…
  • Work in an agile environment with weekly sprints, following iterative development and focused on quality and performance
  • Be involved and participate in making technical decisions
  • Join a super friendly, collaborative and talented team where your opinion will be highly valued

Main requirements

  • You have deep knowledge of the Java language and parallel code execution.
  • You have strong experience with Spring IoC, Spring MVC, Spring Data.
  • You have a solid understanding of the web technology stack and building software that works at scale
  • You have experience and understanding of OO principles, applying design patterns and maintaining simple designs
  • You are well-versed in clean code practices
  • You have experience working within a multifunctional team and collaborating with your peers
  • You understand the advantages of iterative development
  • You are eager for knowledge, keeping yourself up-to-date with the technology stack
  • You have experience with relational and/or non-relational databases
  • Fluent English is a must

Nice to have

  • You have experience with various AWS services and understand the challenges of deploying large applications in the cloud.
  • You are experienced with microservices (Docker, Kubernetes)
  • You have knowledge of these technologies: Nginx, Tomcat, MongoDB, Quartz, Deployment technologies
  • Deep knowledge of the Spring framework, including Spring Security


  • 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