Senior App Developer

Do you get excited about building software thatscales tomillions of users? Are you the kind of engineer who doesn't just fix problems — but reshapes the way a team works? And does the idea of your code directlyimpactingthe fitness experience of4.7 million membersacross Europe sound like your kind of challenge? Then keep reading.
At Basic-Fit, technologyisn'ta support function —it'show we grow. Our clubs run 24/7 thanks to the software and hardware we build in-house, and our members manage everything from freezing their membership to tracking their workouts through our app. That means what you build truly matters — at scale, across 6 countries, every single day.
Your Role
As a Senior App Developer,you'renot just shipping features off a roadmap.You'rea pivotal engineer who shapes how the team works, raises the bar on quality, and helps define our long-term engineering direction.You'llbe working in Tilburg alongside a talented mix of React (Native) developers, Node.js developers, Product Owners, Designers-and even a Talent Coach dedicated to your personal growth.
Your tasks:
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Working closely with Product and Design to build high-quality mobile experiences
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Taking ownership of the mobileapplicationarchitecture and keeping the app scalable and maintainable
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Constantly improving the release process and ensuring stable iOS and Android releases
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Monitoring and improving app performance, stability, and crash rates
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Keeping up with the React Native/mobile ecosystem andconstantlyevaluatingrecent trendswhilescoping them to Basic-Fit context.
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Mentoring other developers and sharing(mobile)best practices
Your tech stack:
We build our applications with ReactNative, TypeScript, Tailwind, Storybook, Service Workers, Next.js and Playwright. Our APIs run on Nest.js, TypeScript, Prisma, Postgres, Redis, AzureEventGridand AzureServiceBus. To keep everything running, we use Heroku, Azure DevOps, New Relic,Akamaiand GitHub Copilot.
Who are you?
You'rea problem solver at heart, with software as your weapon of choice. You understand that making real impact requires collaboration —you'renot afraid to knock on doors to get things done. Scale and complexitydon'tintimidate you; they motivate you.
Additionally,we'relooking for someone who:
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Hasdemonstratedexperience with at least part of our tech stack and loves sharing that knowledge
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Understands how to manage risk andisn'tshy about taking ownership
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Thrives in a fast-moving environment where unnecessary rituals are kept to a minimum
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Is eager to explore AI tooling in the development process
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Is eligible to work in the Netherlands (wedon'tsponsor new work visas, but existing sponsorships can be transferred)
What do we offer you?
At Basic-Fit,it'snot just about work —it'sabout your growth. As a SeniorAppDeveloper,you'llhave the freedom to make an impact and develop yourself in a dynamic, tech-forward environment.
What you can expect from us:

• You will be working in an awesome office in the Plan-T building next to Tilburg Central Station.
• Training & development: Unlimited access to GoodHabitz and LinkedIn Learning.
• Career opportunities: Plenty of room for growth, both professionally and personally.
• Enjoyment at work: An informal, international, and down-to-earth working atmosphere. Because we value collaboration, we work four days a week in the office and one day from home.
• Innovation: Your ideas contribute to strategic projects that are directly visible to millions of members.
• Salary: A gross monthly salary between €4.650 and €6.650 based on 40 hours, depending on your experience and background.
• Secondary benefits: Travel expense reimbursement, bicycle plan, health insurance discount, home-working allowance, and pension scheme (52% premium paid by Basic-Fit).
• Sport: Access to our gym at head office.

About Basic-Fit
Basic-Fit is the European leader in the value-for-money fitness market, with more than 4.7 million members in 1,650+ clubs across 6 countries. We continue to grow and constantly improve. Are you looking for a place where you can make an impact and enjoy your work? Then you've come to the right place with us!
What makes us unique?

• Working with impact: What you do makes a difference. We work not only for, but with our members, partners, and teams.
• Collaboration: Everyone works together to achieve goals and celebrate successes.
• Diversity and inclusion: Everyone is welcome in our work environment.

🎯 Apply now!
Are you ready for your next adventure? Apply and we will contact you as soon as possible.
Questions? Feel free to contact Yara at [email hidden].
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