Senior Backend Engineer m/f/d in Hamburg, Germany

  • Qubit9 GmbH
  • Hamburg, Germany
  • Dec 23, 2021
Full time Blockchain

Job Description

Decentralized technologies will be the disruptive force - Come reinvent the internet with Qubit9! As a team of serial entrepreneurs, our aim is to build a decentralized data cloud powered by blockchain technology. Together, our ambition is to become the next big thing in blockchain and in the cloud. 

The founding team of Qubit9 had tremendous success in business in the past. Kai & Christian Wawrzinek were the original founders of Goodgame Studios, scaling the company from zero to public listing at NASDAQ and beyond. Christian Kaul is a serial entrepreneur who previously worked for Airbnb, Groupon, and Goodgame Studios. Together we think even bigger - we want to build a disruptive European technology champion - a counterweight to Amazon AWS, Microsoft Azure, or AlibabaCloud.

To help build our team and structures, we are looking for a highly motivated Senior Backend Engineer m/w/d.

Your Tasks

  • Design, build and operate large-scale systems serving data with the latency of tens of milliseconds to many countries worldwide with millions of users.
  • Write high quality, well tested code
  • Brainstorm with the founders on how to solve big problems with decentralized cloud solutions
  • Play a crucial role in the growth of our highly ambitious startup


  • At least 5 years of back-end or protocol-level software development experience
  • You’ve designed, built, scaled, and maintained production services and know-how to compose a service-oriented architecture
  • Strong experience in designing and developing APIs and high-volume data streaming and processing systems with server-side languages like Golang or Rust
  • Experience with Docker, and modern cloud technologies is a plus
  • Hands-on experience with SQL and NoSQL storage technologies
  • Experience in Git/GitHub and branching methodologies, code review tools, CI tools, JIRA, Confluence, etc
  • Great at algorithm design, problem-solving, and complexity analysis

Next Steps

  1. Please submit your LinkedIn Profile or CV together with the application form
  2. After checking your application, we invite candidates fitting our requirements to a first screening during which we will also tell you about us.
  3. We will then initiate further interviews to get a better picture of you and your skills while striving for a fast and lean process.
  4. Very soon you might get an offer call, a written offer letter, and one signature later you join the team.