Job Description
FitXR is building the future of fitness with immersive workouts. We are seeking a Senior React Engineer to bring their expertise into the 3D world, creating interactive experiences that make movement fun. This role involves leading features from brainstorm to release, acting as the React expert, and collaborating with cross-functional teams to build seamless VR interfaces. Candidates need strong React experience, proven project ownership, and comfort with ambiguity, ideally with curiosity in 3D/VR.
Good To Have:
- Some Unity or VR development (professional or hobby)
- Backend development (C# preferred)
- Automated testing pipelines
Must Have:
- Lead the tech side of features from brainstorm to release
- Act as the go-to React expert
- Team up with Designers, Product and Unity/Backend Engineers
- Help define how we build
- Share knowledge, raising the overall level of code craft and collaboration
- Push the limits of our React–Unity integration
- Strong React experience in production environments
- Proven ability to own projects end-to-end
- Experience working in small, cross-functional teams
- Excellent communication
- Comfort with ambiguity
- Curiosity about 3D, gaming, or VR
- Perspective of AI as a teammate
Perks:
- Unlimited paid leave policy
- Flexible 40-hour working week (core working hours 10am - 4.30pm)
- £800 per year learning budget
- £900 per year wellbeing budget
- Option to sacrifice wellbeing budget for private health insurance scheme through Vitality
- £400 home office setup budget
- A Meta Quest 3
- Work from anywhere scheme
- 12 weeks fully-paid family leave (from day one)
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
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