Senior Back-End Engineer

Job description

Backend Engineer at OneFit

When the world gets more and more digitised, people are becoming at risk of being physically passive and mentally overloaded. We want to turn the tables and use technology to help our memberships to stay fit. To get there, we need you on our squad.

We are growing as a tech start-up into the scale-up phase (envision a scale-up as a startup on steroids ;D). To improve our product and services we need great people to bring the workout revolution into the world. We have a lot of exciting development challenges, especially as a back-ender. That’s why we need you.

OneFit is about

We are on a mission: One Fit Planet.

OneFit is a technology driven sports and yoga solution that helps its members to stay motivated and keep working out. We do this by offering a flexible monthly membership for a rainbow of workouts. From swimming to fitness, from yoga to padel, from boxing to pilates all available at your fingertips with our app. Choosing from over 60 thousand classes every month.

What can you expect as a backend engineer at OneFit?

Our platform transmits thousands of bookings and check-ins every hour in different countries and languages and in the near future also in different currencies and timezones. We are working on multiple integrations with other booking systems like MindBody, Virtuagym and many more using our venue API.  We have real time listings of workout availability and we make it possible for our users to see who else is doing that workout. We are working on efficient algorithms to engage our members and help them to reach their fitness goals. Our code quality standards are high and therefore on it self already pretty challenging. There is much more we want to build and so much more we can improve. As a backend engineer you will be working on a variety of projects like waitlist, churn prediction model, venue api, business intelligence, core stability and much more.


We believe in motivation over regulation. Developing the good way can only be done by a good team. We believe motivation is as important as skills for a team to be successful.

So we don’t ask you to be in at 9 am. Instead we want you to challenge standing ideas; be curious about new technologies and share your best practices because you want to.

What do we offer?

  • Competitive salary

  • Free OneFit membership

  • Company sponsored happy hours

  • Apple equipment

  • Education budget

  • Free lunch

  • Team trips and drinks

  • Flexibility


Which skills are relevant to us?

  • 5+ year of experience in backend development

  • relevant OOP engineering skills namely PHP7 - Laravel, Symfony or any other recent PHP framework

  • experience with NodeJS - Express/RESTFul, Apollo GraphQL, Mongoose etc.

  • perfect understanding of design patterns & micro-services architecture patterns (namely Events Driven)

  • Experience with CI/CD and Cloud: GCE, Kubernetes, Docker, MongoDB, MySQL, Elastic, service mesh, Kafka etc.

  • fluent in English

  • full time sense of responsibility

  • experience or interested in unit/feature testing

  • Independent worker, also able to work well within a team

  • Degree in Computer Science and/or Software Engineering is a plus