Senior Back-end Developer Python (m/f/d) - CeleraOne

Axel Springer SE
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CeleraOne is one of Germany’s leading paid-content tech companies and part of Axel Springer group. We provide a complete analytics and automation platform optimized for synchronous real-time processing of people data, content, and device / machine signals of a user's customer journey on customer websites. Our technology is built for performance, scalability and the reduction of operating costs. We integrate all communication channels between content provider and end user, connecting with conventional enterprise solutions and free valuable business data from information silos. We facilitate our technology to publishing groups such as Axel Springer ( and, Süddeutsche Zeitung, Rheinische Post, Die Zeit and many more.

We are a team of highly motivated software developers and mathematicians with diverse backgrounds. Our English-speaking team of roughly 40 members, together fostering a friendly and respectful atmosphere, where everyone has the opportunity to take over responsibility quickly. 

Your challenge

  • Design and implementation of our Python-based REST API
  • Working on our storage layer based on MongoDB
  • Working with our technology stack, which includes Pyramid, Colander, Cornice, Nginx, OpenResty, Lua, Buildout and Robot Framework
  • Spearheading transition of legacy processes to continuous integration deployment, using docker, Jenkins and Gerrit
  • Auditing code submissions and participating in code reviews using Gerrit
  • Improving architectural integrity of our storage, engine and web interface layers
  • Transitioning legacy code to python3
  • Participating in Scrum activities

Main requirements

Required Skills and Experience:

  • Degree in Computer Science, Computer Engineering or a related field or relevant professional experience
  • Several years of professional experience with Python development
  • Experience with test definitions and test-driven development
  • For a Senior position experience with refactoring is required
  • Good command of English (fluent in written and spoken)
  • Strong interpersonal and communication skills
  • Excellent problem-solving skills, creative, highly motivated self-starter and learner
  • Ability to quickly learn new technologies and new products

Desired Skills and Experience:
An ideal Senior candidate will have solid experience with some of the following aspects:

  • Web development and HTTP REST APIs
  • Web Architecture, interfacing with storage layers and external APIs
  • Writing, formatting, maintaining and publishing documentation for code using Sphinx
  • Dockerizing applications
  • Auditing and reviewing code using tools such as Gerrit


What we offer at CeleraOne

  • An environment that embraces freedom and autonomy and values team spirit and open communication. We encourage you to put forward your ideas and thoughts
  • Agile software development
  • Flexible working hours
  • A refreshing yet highly professional atmosphere in a diverse team
  • Modern tech stack (Python, C++17, ES6, Gitlab, Jenkins, JIRA, openresty, MongoDB, Redis, Memcached)
  • Central location in Berlin
  • Proportional sponsorship of public transportation ticket
  • Regular Team events
  • Benefits of the Axel Springer Group

Apply now

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Or sign up to refer and earn a reward of €300