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Senior Backend Developer in Barcelona


40,000 - €50,000
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Job Description

About 3scale

3scale's mission is to enable an API driven Web - providing tools and infrastructure for companies and individuals to open, manage and consume APIs. Our tools help people to open their data, publish new services and above all create new opportunities for innovation and business.

APIs are becoming the lifeblood of the Web - take the chance to help build some of the tools that are enabling this revolution! You'll also be joining an awesome team at all levels - from product innovation to cutting edge engineering.

About you

We are looking for experienced engineers passionate about solving tough problems with elegant, performant and well-tested code, with a focus on backend and infrastructure.

As part of 3scale's Engineering team you will be developing and maintaining features that ensure our API Management system is highly available, low latency, performant, and meets the demands of our customers while serving hundreds of millions of requests per day.

If you are a person that likes to think ahead of the curve and tackle real scalability issues, this is the job that will put your skills to the test.

You'll need to have

  • Excellent analytical and problem solving skills.

  • Strong communication skills and sense of accountability.

  • Willingness to teach and to learn.

  • Strong knowledge of algorithms, databases, systems and networking.

  • Good understanding of HTTP, REST, proxies, authentication and security.

  • Experience with Ruby and its ecosystem, or the desire to learn it quickly.

  • Proficiency in the Linux/UNIX environment.

  • Commitment to quality and reliability, including TDD and CI workflows.

  • EU citizenship or working permit.

It would be great if you had

  • Free software contributions you can proudly point us at.

  • Experience building scalable systems.

  • Working knowledge of Redis, Nginx, Docker and AWS.

  • A passionate interest on low-level systems and performance tuning.

  • Knowledge of web-ops and monitoring tools (Logstash, Kibana, Grafana, ...)

  • Moderate table-tennis or football skills :)

3scale offers

  • Cutting edge of the evolution of the Web, our customers are doing new and exciting things in Web tech and mobile.

  • Opportunity to work and collaborate with open source projects.

  • Highly motivated multi-cultural team spread across two continents.

  • Barcelona office is in the city centre with a great open space, terrace and quick access to all the important parts of the city including the beach.

  • Regular team events, internal presentations, hack events and BBQs at our terrace.

  • Salary based on experience and always very competitive

Useful links


Tech blog:

3scale Engineers:


About 3Scale

  • Saa S

  • Barcelona, Spain

  • 10-50 employees

  • 2007

We founded 3scale in 2007 because we believed the world would become web enabled, and that APIs would be required. That guess has proven correct on both counts. We now power APIs for more than 500 organizations of all sizes across many industries. And still, we think this transformation is just picking up speed. There is much more to come and more work to be done.

Our goal is to enable organizations and institutions worldwide, large and small, to successfully open, manage, and use APIs. We do it as openly as possible, and always with community in mind.

With offices in San Francisco USA, and Barcelona Spain. We’re a growing global team and there is plenty of opportunity to learn from others and share your smarts. We work hard, play often, and just generally enjoy each others’ company. Join us.

Official website, founding date, employees, how did it all begin... Do you know the whole story?

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