Senior Fullstack Engineer | £80,000 – £95,000 + Equity | TypeScript | React Native | Node.js | Serverless | Hybrid (1-2 Days in London)
Join one of Europe’s most exciting consumer fitness startups—fresh off a £5M fundraise, recognised by Apple as a finalist for Global App of the Year, and recently acquired by a category-defining global fitness platform.
They’ve built a best-in-class mobile app experience for runners of all levels—from 5k beginners to marathon veterans—and are growing fast. With iOS, Android, and Apple Watch apps already live, they’re scaling their engineering team to take their platform to the next level.
This is a rare opportunity to build full-stack features across mobile, web, and backend systems—in a mission-led, product-obsessed, high-performance team.
What You’ll Do:
Design, build, test, and ship new features across React Native, Node.js, AWS, and GraphQL
Work cross-functionally with product, design, and other engineers to deliver high-quality UX
Own full lifecycle of development from architecture and coding to deployment and observability
Contribute to developer tooling, CI/CD, and infrastructure to improve team velocity
Participate in live releases and take turns leading production deployments
Work closely with CTO and co-founders in shaping product and tech direction
Tech Stack:
Frontend: React Native (iOS/Android), SwiftUI (Watch), TypeScript, GraphQL (Apollo)
Backend: AWS Lambda (Node.js & Python), AppSync, DynamoDB, S3, EventBridge, SNS
Tooling: GitHub Actions, Fastlane, Sentry, Mixpanel, Intercom, Maestro E2E, Terraform
✅ What You Bring:
4+ years of software engineering experience (frontend, backend or full-stack)
Strong TypeScript and JavaScript skills
Proven ability to ship end-to-end features across the stack
Comfort working in fast-paced, iterative environments (they shipped 443 API releases last year!)
Familiarity with CI/CD, test automation, code reviews, and modern dev practices
Enthusiastic about shared code ownership, pairing, and collaborative design
✨ Bonus Points:
Experience with React Native at scale
AWS or Serverless architecture experience
Exposure to SwiftUI or wearable tech
Terraform or Infrastructure-as-Code (e.g., CDK, CloudFormation)
Passion for fitness, health, or consumer tech (or even better, you're a runner!)
Salary & Benefits:
£80,000–£95,000 base salary + generous equity
Brand-new MacBook, desk setup budget, free running watch
Private healthcare, enhanced family leave, and fertility support
25 days holiday + bank holidays
Weekly paid time to work out during work hours
Biannual salary reviews
Flexible working: typically 2–3 days/week in the Vauxhall office
⚡ Interview Process
45-min call (chat + live Leetcode-style coding)
Short take-home task (1–2 hours)
Deep-dive tech interview (system design + architecture Qs)
Final team meet & greet with founders
This is your chance to join early, build real product, and shape the future of a platform loved by a global and growing user base—with all the upside of a startup and the support of an acquisition.
Apply now or message Sam Barcia for more details.