Back-end Developer (NL/EN)

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Back-end Developer

Work in an intelligent team behind the scenes on the development of our software

Fulltime | 32 to 40 hours/week | HQ Groningen


555 phones * 473 phone plans * 65 bundles = a lot.

That’s why we build everything ourselves. This includes all front- and back-end systems of our website. As Back-end developer, you develop code that colleagues and customers can rely on. You form an active part of this process from the get-go and are provided with plenty of room for new ideas and personal input.

Nederlands | English

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 a Back-end Developer?

  • You help translate our business objectives into well-working software.
  • You help build leading telecomsoftware.
  • You get the responsibility for your part of the code.
  • You get the opportunity to work with new techniques when possible.
  • You get our trust to make your own technical choices.

⬆️ 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?

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

What do we offer?

Next to a good salary, special Belsimpel Benefits, a beneficial pension plan and 25 vacation days a year, we also offer:

Plenty of (international) growth opportunities

Get the best custom-made career in the Netherlands.

Your development is key

Individual coaching, code reviews and much more.

The best gear

Desktop with 3 displays, CPU: Ryzen 2600X, GPU: GTX1050, RAM: 32GB. At home too.

Impact from day one

Instant responsibility you feel comfortable with, and your written code will be used within days.

Who are you?

  • We are looking for bright and passionate colleagues. 
  • We expect you to be an incredibly competent programmer, which is why we do not require a lot of prior knowledge of the programming languages we use daily. If you are highly capable, you’ll master these in no time.
  • If you are smart, critical yet respectful and enjoy creating complex systems that impact the user-experiences of hundreds of thousands of customers and a team of hundreds of colleagues, we are looking for you to join our team!
  • You are able to work at the office in Groningen during your entire onboarding period. After that, we have a remote working policy of a maximum of 2 days per week. More days are possible in consultation.

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.

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.

Gomibo Benefits

Will you be there soon? And only if you want to, because if you don't like it, that's fine too. At Gomibo, everyone can be themselves.