Medior Software Engineer

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Medior Software Engineer

Slimmer AI is an AI B2B venture studio based in Amsterdam and Groningen. We believe AI to be the single most transformative technology of our time—and that it will fundamentally change the way we work. We invest in and co-build B2B SaaS companies with inspiring founders who use AI to disrupt the status quo—helping them build great products and sustainable companies.

As a Medior Software Engineer, you'll build new products alongside tech startup founders on their entrepreneurial journey. 

Full-time · Groningen

About the role

We are looking for a medior software engineer with the heart of an entrepreneur. Leveraging your experiences in professional software development you'll help turn visions in to the first steps of real products. In this role you and a team of software and AI/ML engineers will build actual minimum viable products around web APIs, front-end, data collection, data analysis, and customer needs.


  • You will work on a wide variety of ideas and build young projects together with a team of software engineers, a machine learning engineer, and a business developer
  • You will validate the technical feasibility of features experimenting and quickly iterating on prototypes
  • You will contribute both code and technical insights for new product development

The skills & experience you bring

  • Experience developing web services (like REST APIs), and shaping the designs of aspects and/or features of these systems
  • A curious, creative, analytical, and flexible mindset to build all types of new products
  • You are results-oriented, self-driven, able to work independently, and technologically flexible
  • Experience writing web services in one or more programming languages (Python, Java, Javascript/Node, Go, Scala, C++)
  • Software engineering experience (minimum 2 years professional) with Git, Docker, Linux and command line tooling, SQL databases, Continuous Integration / Continuous deployment (CI/CD)
  • Experience working with front-end engineers and/or direct front-end development
  • Proficient English language written and spoken communication skills
  • Experience leading and mentoring/coaching junior developers is preferred
  • Having experience building data-driven applications, (REST) APIs, or with machine learning models is preferred, but not required
  • Knowledge of libraries such as scikit-learn, pandas, numpy, or scipy are preferred, but not required
  • Bonus points if you have experience with Python and Django, agile working methods, or if you have worked in a Start-up/Scale-up environment before

What we offer

We are a team of innovators, at the forefront of technical knowledge and cutting-edge techniques. From research to prototype, from business validation to new product launch: innovation is at the heart of everything we do.

We offer a fun, innovative, and dynamic entrepreneurial environment where you will have a high level of autonomy and responsibility in your work, meet great people to collaborate with, and see your work make a difference in the real world. And we can promise there will be lots of cake (these engineers really do love cake...).

We hire quirky talents who dare to take a stand and explore new directions. We empower our team to be self-leading, take initiative, and experiment. Because we believe that creative and fulfilled people build the most helpful and inventive products. With us you can build great AI software companies and a career in tech.

If you think this sounds ‘gezellig’, we’d love to hear from you!