Developer (min. 16u/w) (NL/EN)

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Back-end Developer

Work with your team to implement daily improvements for the website.

Part-time | 16 hours per week | Head Office Groningen


Work on impactful projects.

Help build and improve our website and systems whilst gaining valuable experience in the field. You work on your own projects and are responsible for your own code. This part-time job is a great opportunity to learn from professionals and apply your new skills right away.

English | Nederlands

How do we develop software?

Each team works on their own part of the software. These may be customer-oriented components, but also our warehouse system, or our own HR system. You develop, optimize and implement new features. All systems we are working on are developed by our own teams, so that we can respond to complex and challenging changes in the marketplace. Even though we also use the systems ourselves, we create it as stand-alone software that is of value to other companies. So even though we are also a webshop, we consider ourselves to be a software company. Our scope is a lot broader than you might have expected.

Our stack

... and don't forget Gitlab, Docker, Typescript and Redis. We use various tools, including Jetbrains, Slack, Ubuntu/Windows and vscode. This is always in motion, as the world of technology never stands still either.

What will you do as Back-end Developer?

  • You become a full-fledged member of one of our development teams.

  • You help translate our business objectives into well-working software.

  • You help building leading telecomsoftware

  • You get responsibility for your part of the code

  • You get the opportunity to truly learn a lot and to do more than just small tasks. 

How do we work?

  • We have a mix of about 70 fulltime and parttime developers, both experienced and recently graduated colleagues.

  • We use the MVP-concept (Minimum Viable Product), in order to achieve increased customer satisfaction as quickly as possible.

  • We have fun together! There are both company-wide and development-specific get-togethers and activities for everyone interested. Not interested? That's fine too!

  • We are ambitious and fanatical. We want to improve, because we like doing so.

  • We have a flat organizational structure where it counts what you say, not who says it.

  • We have no fixed job profiles. This has the great benefit that we can tailor your job and your development, to suit your needs.

  • The development department is working in English, but the majority of the colleagues speak Dutch too.

⬆️ We are working hard to create a new video for this vacancy. In the meantime, take a look at the video above from another development team to get an impression of who we are and how we work. 

What can you expect from us?

  • Experienced full-time colleagues to guide you.

  • Exams? Then it's always possible to work a little less.

  • You get the chance to develop personally. Many part-timers continue working at Belsimpel after their studies.

  • Short release times. We release our code several times per day. Finished = live.

  • No hierarchy. We don't like that.

  • You are the technical expert. No non-technical colleague will sit in your technical chair. Stick to what you know, right?

  • We replace legacy code proactively. Of course, every software has a legacy, but you do not have to keep legacy code alive forever.

  • Informal working atmosphere. Everyone can be themselves within Belsimpel.

  • With 70+ colleagues from more than 12 nationalities, we form a nice international community. 

Who are you?

  • You are studying a technical education at the Hanze or RuG (HBO ICT or Computing Science).

  • You are smart, positive and critical, and can't wait to work on projects that affect hundreds of thousands of customers, and hundreds of colleagues. 

  • You are available for 16 hours a week (or more) on weekdays between 9:00 and 18:00. 

English | Nederlands

If you have any questions regarding this vacancy, you can always contact our Talent & Recruitment Specialists. They are available on business days between 9:00 and 17:30 at the phone number 050-2113856. You can also send an email to

Do you want to know what the application process looks like? Click here.