Backend Senior Engineer

Barcelona, Spain
Full Time

If you like challenges and enjoy owning your code from design to production, this is meant for you!


A Senior Backend Engineer with hands-on experience in developing complex solutions, to join our Core Features team.

Skills & requirements:

  • +5 years of experience in Software development, programming in one or more languages like Java, NodeJS, Python or Go.
  • Solid experience with Key-Value stores and in-memory databases (e.g. Redis, Memcached). 
  • Strong experience with testing tools and modern CI/CD frameworks.
  • Knowledge in Linux, Git, Docker & Docker-Compose and AWS Cloud.

Bonus points:

  • Software development experience in Java / Spring Boot.
  • Design and implementation of low-latency, high-throughput platforms.

Smadex is a cutting-edge ad-tech company: we process more than 2,5 million ad requests per second, replying under 100ms. Every day we generate several TBs of data that need to be processed, analyzed and aggregated, so our real-time components get smarter every day. We need you to help us keep our platform in motion!

-What will you do at Smadex?

  • Be an advocate of the “You build it, you run it” philosophy: You will own your code from design to production; testing, deploying and monitoring. Be an essencial part of every stage in the software development process.
  • Develop and maintain a high-throughput low-latency platform. You have not lived until you fix an error happening 1 million times per second.
  • Improve and optimize real-time components: every millisecond counts.
  • Participate in code reviews, contribute to technical and architectural decisions, collaborate in a fast-paced environment where every opinion counts.

Our tech stack is 100% based on AWS, running thousands of instances and containers in 7 different regions.

Our technologies: Java, NodeJS, Python, Redis, AWS, Nginx, HAProxy, Apache Druid, MySQL, Memcache, Netflix Hollow, and much more :)  

If you become a member of our team, you will get the chance to:

  • Have a real impact on one of the hottest ad-tech in Barcelona and Europe.
  • Be part of an agile team with a strong focus on innovation and technology, to continue improving your knowledge in the field.  
  • Work in a multicultural, young & talented environment with peeps from more than 22 different nationalities!
  • Ticket restaurant.
  • Flexible working hours.
  • Daily fresh fruits & snacks.
  • DIR gym membership.
  • TGIF’s monthly activities, team-building events, and work anniversary celebrations!

If you want to know more about us visit our website, and for a sneak peek of the cool stuff we build, check this video out!


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