Senior React Engineer

We usually respond within three days

At FitXR, we’re building the future of fitness - immersive workouts which turn movement into play, not punishment. We’re for the misfits: the ones who’ve always felt a little out of place in traditional fitness spaces. This is a new kind of community where movement is inclusive and everyone belongs.

We’re looking for a Senior Engineer to bring their React expertise into the 3D world and build interactive experiences that make movement genuinely fun. You’ll be joining a small, high-trust and fully remote team who are obsessed with learning fast and helping people move because they want to, not because they should.

What you’ll do 👀

• Lead the tech side of features from brainstorm to release - balancing speed, polish, and player joy

• Be the go-to React expert - setting best practices, performance tuning and helping us build smarter, not harder

• Team up with Designers, Product and Unity/Backend Engineers to make VR interfaces feel seamless and alive

• Help define how we build - bringing product thinking and technical insight to every sprint

• Share knowledge, raising the overall level of code craft and collaboration

• Push the limits of our React–Unity integration to unlock even richer player experiences

You should apply if ✅

You’re a proactive, product-minded engineer with:

• Strong React experience in production environments

• Proven ability to own projects end-to-end, balancing delivery speed with solid engineering principles

• Experience working in small, cross-functional teams

• Excellent communication - you keep people in the loop, surface blockers early, and stay cool in chaos

• Comfort with ambiguity - you can build clarity where none exists

• Curiosity about 3D, gaming, or VR - bonus if you’ve built something weird and fun before

• Perspective of AI as a teammate, not a threat - you’re leveraging AI to speed up your workflow, generate tests and help prototype ideas faster

Nice-to-have experience:

• Some Unity or VR development - professional or hobby!

• Backend development - C# preferred

• Automated testing pipelines

You shouldn’t apply if ❌

• You want a 200-page spec before you start coding

• You prefer working in a giant org where decisions move slower than patch notes

• You’re allergic to collaboration or ownership

Benefits

🏝 Unlimited paid leave policy

⏰ Flexible 40-hour working week (core working hours 10am - 4.30pm)

🌱 £800 per year learning budget and more when you need it

🧘 £900 per year wellbeing budget with the option to sacrifice some of this wellbeing budget for a private health insurance scheme through Vitality

🏡 £400 home office setup budget for things like a comfy chair, new desk, any accessories which make your work environment comfy

🪐A Meta Quest 3 to get you immersed in FitXR and the wider VR ecosystem

✈️Work from anywhere scheme to combine work and travel

👶 12 weeks fully-paid family leave which everyone, irrespective of gender or sexual identity, is entitled to from day one

About FitXR

FitXR is a fitness technology company working at the cutting edge of VR and MR, building a movement for movement.

We started life in 2016 in a garden shed in the UK. Today, we’re building FitXR, one of the top-downloaded apps on the Meta Quest store. We’ve raised close to $30m from top investors such as Maveron, Hiro, and BoostVC.

We've built a growing range of fitness studios, from box workouts with world-class trainers like Olympian Nicola Adams to immersive Zumba dance classes. While nothing compares to trying it yourself, you can watch a trailer here.

Our team is distributed across Europe and the US. We’re guided by our Principles of Play: four core beliefs about how we treat each other and our community. We make space for every voice, believe in the importance of a learner’s mindset, and prioritize team success over individual glory.

FitXR is available on Meta Quest 2 & 3 and has been downloaded by over a million people worldwide and featured in Forbes, Empire, T3, Washington Post, Men's Health, GQ and more.

FitXR have been rated one of the top 10 Most Promising Startups, #2 in Flexa's most flexible VR startups and #28 in Tempo's top 100 super startups to work for 🎉

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