Senior TypeScript Developer

Do you get excited about building software that scales to millions of users? Are you the kind of Developer who doesn't just fix problems — but reshapes the way a team works? And does the idea of your code directly impacting the fitness experience of 4.7 million members across Europe sound like your kind of challenge? Then keep reading.

At Basic-Fit, technology isn't a support function — it's how 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.

Location: Basic-Fit HQ NL Tilburg

Time type: Full time

Your Role

As a Senior TypeScript Developer, you're not just shipping features off a roadmap. You're a pivotal engineer who shapes how the team works, raises the bar on quality, and helps define our long-term engineering direction. Your center of gravity is the backend, but you're just as comfortable stepping into frontend code when the problem calls for it. You'll be working in Tilburg alongside a talented mix of engineers, Product Owners, Designers, Delivery Leads and even a Talent Coach dedicated to your personal growth.

Your tasks

Building and maintaining APIs that handle millions of requests without breaking a sweat

Defining Service Level Objectives for the APIs and systems in our platform

Driving structural improvements to work towards those objectives

Jumping into frontend code when a feature, bug, or architectural decision calls for it — you're not fenced off from the client side

Supporting teams with documentation, architectural design, and tackling complex bugs

Co-shaping the long-term engineering roadmap — you have a real say in what we invest in

Co-owning non-functional topics like security, privacy, and performance

Being a key driver in how we adopt AI in our development process (no prior experience needed — just curiosity and enthusiasm)

Your tech stack

We build our applications with React, TypeScript, Tailwind, Storybook, Service Workers, Next.js and Playwright. Our APIs run on Nest.js, TypeScript, Prisma, Postgres, Redis, Azure EventGrid and Azure ServiceBus. To keep everything running, we use Heroku, Azure DevOps, New Relic, Akamai and GitHub Copilot.

Who are you?

You're a problem solver at heart, with software as your weapon of choice. You understand that making real impact requires collaboration — you're not afraid to knock on doors to get things done. Scale and complexity don't intimidate you; they motivate you.

Additionally, we're looking for someone who:

Has demonstrated experience with at least part of our tech stack and loves sharing that knowledge

Understands how to manage risk and isn't shy about taking ownership

Thrives in a fast-moving environment where unnecessary rituals are kept to a minimum

Is eager to explore AI tooling in the development process

Is eligible to work in the Netherlands (we don't sponsor new work visas, but existing sponsorships can be transferred)

What do we offer you?

At Basic-Fit, it's not just about work — it's about your growth. As a Senior Backend Developer, you'll have 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 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.

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