Who we are

Since its foundation in Groningen in 2008, Belsimpel has become a big part of the telecom market as a tech company. With a close-knit team of over 500 motivated, enthusiastic and honest students and professionals, including over 80 (business) development colleagues, we go above and beyond every day to change the Mobile World. We’re not a provider, nor a store or search engine. We’re a way of life, a Method™ to help customers find their perfect mobile telecom match.

What we do

As Belsimpel keeps growing (turnover of 360 million in 2019), we’ve got many different development and data science projects ready for take-off. No day is the same! The telecom market consists of complex structures (555 phones x 473 contracts x 65 bundle options = a lot of options), which is why we’ve decided to do everything ourselves. We’re not only talking about our website, but also our warehouse system, CRM system (Customer Relationship Management) and our ABS (A/B testing system) and many more. Everything was developed in-house!

What we can offer

Love solving complex puzzles and want to put your science knowledge to good use? We got many different technical challenges ready for you!


Haven’t completed your degree yet? Bring your future a step closer during the final phase of your degree. Start working in a field that interests you and join us as part- time (business) developer or data driven online marketer. Only just started your studies? We’ve got great part-time opportunities for you in departments like Returns and Repairs!


*Completed your degree? Join us as full-time Back-end Developer, Data Scientist or Business Developer. Not sure what you want to do? Check out one of our Traineeships! For more information, please visit

Member of Francken at Belsimpel Being a Data Driven Developer at Belsimpel gives you a good balance between working as a programmer and using mathematics to explain and predict behaviour of data. A nice change compared to projects that you might work on during a course is that you will be working on a real life problem which may not have an optimal solution. Another difference is you will be working with real data that may not always be clean so you will have to come up with creative ways to work with this data. Luckily the curriculum contains various courses such as statistics and numerical mathematics that prepares you for this type of work.

  • Mark Redeman (Team Data Driven, Belsimpel)

Job openings from