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API Developer

Your role

We are looking for an experienced and enthusiastic API Developer. In your role you will be responsible for developing, testing, deploying, maintaining the interfaces between Loyalty Cloud and other systems and applications, such as till systems, webshops, mobile apps, social channels, marketing execution platforms, DMPs and ERPs.

With your great communication skills, you’re able to talk to techie clients, colleagues and stakeholders to design the required interfaces and dataflows. You’re an absolute ninja in the development of rock-solid APIs in C#. You’re also capable of testing and deploying those APIs together with our clients. Furthermore, you will monitor the performance of the interfaces and further optimise them if needed.


  • An absolute must-have is knowledge of C#, Microsoft Azure and API Development;
  • Experience with Microsoft SQL;
  • English native or Dutch native with impeccable spoken and written English;
  • Able to create all the technical documentation in a clear and structural way;
  • Define and design future data flows and APIs for our future Loyalty Cloud platform;
  • Experience with Webhooks and big data solutions;
  • The strength to choose people over process, collaboration over negotiation, working software over documentation, and all other things Agile…

What we offer you

In return for your commitment as an API Developer, we offer you an exciting work environment in the area of loyalty and marketing automation with an ambitious roadmap. After all, we are working on the future of loyalty marketing! And with every milestone you accomplish with your young and equally ambitious colleagues, you’ll certainly enjoy the fabled m—wise summer parties, winter sports and company outings on that boat we mentioned earlier. That is an essential part of our unique company culture. As are the little things like the salad bar at lunch. And the magical snack cupboard (how come it never ends?). And the endless supply of beer every Friday after 4 pm. Did we mention we’re in the heart of Amsterdam too?

(And yes, of course, we’ll make sure you earn enough money to comfortably eat, live, go on holiday, work pleasantly and enjoy your flexible work time as well as your spare time. We’ll also coach you to the next level, offer you training opportunities and make sure you enjoy the onboarding process.)

Responses from recruitment agencies will not be welcomed.

What are you waiting for?

Apply now

Know someone who’d be a perfect fit? Let them know.