Senior Developer

IT Management

SIDESTREAM is a one of a kind software company. We focus on a great work- and engineering-culture while building software for customers, working for a DAO and trying out our own software products.

New Work is not a trend or buzzword for us, but rather our DNA - here are a few examples:

  • We were founded just before the Corona pandemic and grew up accordingly as a hybrid (remote + office) company
  • Our corporate language is English
  • We are one of the first companies in the world to work with a DAO

Although we are only 2 years old, we have already been able to make a difference:

  • Germany-wide we have developed the first digital 2-G Genesenen certificate for the city of Cologne
  • The Handelsblatt already reported about our innovative cooperation with DAO
  • Well-known customers like DuMont and Ubisoft trust us with their software issues

Join the crew - Become part of our motivated team and a developer-first workplace where we build great products and learn new things everyday.


  • As most people search for tech stack in the job posting, we just leave it at the top: We use the newest technologies, so you don’t waste time learning legacy things, here’s a non-exhaustive list: VueJS with Nuxt (soon Vue3, once its production), NodeJS, Python 3.9, Docker, Kubernetes, Github with CI/CD, AWS Services
  • You’ll work alongside other experienced Software Engineers and Product Managers on different software engineering projects. You’ll be part of around 1-3 project teams depending on the project size and your preference
  • Depending on your background and interest, you’ll be leading the technical side (Frontend, Backend or both) of projects while having other Technical leaders to collaborate and consult.
  • You’ll be an important part of Sidestream, you can have a lot of impact on the future of our company e.g. introducing new technologies or suggesting new industries to work in.
  • You’ll get enough focus time to write clean, composable and testable code.
  • You’ll be mentoring less experienced developers within in our proven mentoring process that helps both mentor and mentee to continuously improve their professional skills
  • You’ll have weekly sparring sessions with one of the founders (Nils) to discuss your personal and professional development, receive feedback and talk about concrete technical challenges.


  • Advanced experience in Python or modern JavaScript is important.
  • At least a few years of professional experience. We don’t set clear ranges here, but you should be able to finish projects in a self-sustained way and feeling ready to help lead less experienced developers with finding solutions to complex problems.
  • You enjoy writing high quality, production-ready code, that is always peer-reviewed.
  • You don’t mind doing a real life coding challenge at some point in the application process: We don’t look for pure technical managers. We all enjoy rolling up our sleeves and write some code.
  • English skills to communicate with the team.


  • A variety of projects so that you can truly find out what you like and never get bored: From (real) Crypto to Corona-related Software, you can see a variety of topics.
  • A PR review is not just another process for us. We are serious about taking your code and you to the next level, while also learning all the new patterns and techniques that your code has to offer
  • Well managed processes and working in an agile setting
  • Freedom to choose your own Operating System
  • Good work atmosphere, flat hierarchies, appreciative communication and room for feedback.
  • Be part of a young, ambitious team that works hard, but also enjoys to have a good time together
  • Fully Remote work if you want, but you can also work in our office, if you want to.
  • Attractive benefits and perks (e.g. free lunches and bike subscription)

To sum up, you will join a young team of tech people. We strive to create the best possible workplace for us engineers. If you’re interested let us know, just send us your CV.

Updated: 2 weeks ago
Job ID: 4599344
11-50 employees
Information Technology and Services
SIDESTREAM is a young, highly-motivated Software Startup based in Cologne. We develop high-quality custom software for Big Corporates, SMEs and other Startups.
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Francesca Kilian
Francesca Kilian
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  1. Senior Developer