[Immediate Start] Senior Full Stack Engineer...

Job Description 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 1. 45-min call (chat + live Leetcode-style coding) 2. Short take-home task (1–2 hours) 3. Deep-dive tech interview (system design + architecture Qs) 4. 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.