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Senior Backend Engineer (m/f/d) 

Change and shape the (working) world of tomorrow with us.


What we offer

If you're looking for more than just a job, want to get involved and work to solve the big problems of our time, then Lemin is the place for you.

Who we are

Lemin is the digital support for companies to prepare culture and workforce for the challenges of the future. We do this by combining practical content, Nobel Prize-winning behavioral and organizational psychology (nudging), and artificial intelligence.
In doing so, we enable companies to drive positive change by providing employees with personalized, science-backed coaching moments called "nudges." These nudges help people develop better habits, work smarter and connect with their colleagues. For more joy at work.

Your tasks

  • Design and implement new features and/ or components within our platform and develop prototypes quickly to allow an iterative approach

  • You challenge the status quo and continuously improve the architecture, code and tools to ensure the delivery of high-quality software

  • Demonstrate your strong commitment to code quality, automated testing, and security

  • Improve system design and architecture to ensure high stability, performance, and reliability of the product

  • Collaborate with cross-functional teams to deliver high-quality work in rapid product development

  • Take initiative to research new technologies, read articles and news to understand the current state of the backend community

must haves

  • You have 4+ years of professional experience as a Backend Developer or in a similar role

  • You have 3+ years of professional experience in Node.js and Typescript

  • You are experienced in working with MongoDB

  • You have experience in writing automated tests and TDD

  • You have practical knowledge in DRY, KISS and SOLID

  • You have experience in clean code, pair programming, continuous integration, and continuous delivery

  • You have experience with containerisation and container orchestration (Docker and Kubernetes preferred) in a cloud environment (Google Cloud, AWS, Azure)

  • You have strong English communication and interpersonal skills

  • You love tech!


Nice to have

  • You have experience using Jest

  • You have experience using Redis

  • You have experience using GraphQL

  • You have experience in building B2B products

  • You are based in the wider Cologne region or in Germany

We are looking forward to your application to


Your contact person is Marco Martens – we are excited to hear from you!

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