Senior Backend Developer (Node.Js)

Do you get excited about building software that scales to millions 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 directly impacting the fitness experience of 4.7 million members across Europe sound like your kind of challenge? Then keep reading.

Denkt u de juiste kandidaat te zijn voor de volgende functie? Solliciteer dan na het lezen van de volledige omschrijving.

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.

This Is What Your Role Looks Like

• 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
• 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)

Tech Stack

• React, TypeScript, Tailwind, Storybook, Service Workers, Next.js and Playwright
• Nest.js, TypeScript, Prisma, Postgres, Redis, Azure EventGrid and Azure ServiceBus
• Heroku, Azure DevOps, New Relic, Akamai and GitHub Copilot

Who Are You?

• 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 We Offer You At Basic-Fit

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

• Unlimited access to GoodHabitz and LinkedIn Learning
• Career Growth: Plenty of opportunities for professional and personal development, plus a dedicated Talent Coach
• Work Culture: An informal, international, and down-to-earth environment. xgiwjmb We value working together, so we work 4 days in the office, 1 day from home
• Innovation: Internal hackathons (sometimes even in the club!), and your ideas contribute to strategic engineering decisions

Perks & Benefits

• Travel allowance, bike plan, health insurance discounts, remote work allowance, and a pension plan (52% contribution by Basic-Fit)
• Free Basic-Fit gym membership + access to our gym at HQ in Hoofddorp
• Office: A great workspace in the Plan-T building, right next to Tilburg Central Station