Job Title

Senior Fullstack Engineer | 80,000 95,000 + Equity | TypeScript | React Native | Node.js | Serverless | Hybrid (1-2 Days in London)Have you got the right qualifications and skills for this job Find out below, and hit apply to be considered.Join one of Europes most exciting consumer fitness startupsfresh 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.Theyve built a best-in-class mobile app experience for runners of all levelsfrom 5k beginners to marathon veteransand are growing fast. With iOS, Android, and Apple Watch apps already live, theyre 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 systemsin a mission-led, product-obsessed, high-performance team. What Youll Do:Design, build, test, and ship new features across React Native, Node.js, AWS, and GraphQLWork cross-functionally with product, design, and other engineers to deliver high-quality UXOwn full lifecycle of development from architecture and coding to deployment and observabilityContribute to developer tooling, CI/CD, and infrastructure to improve team velocityParticipate in live releases and take turns leading production deploymentsWork 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, SNSTooling: 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 skillsProven ability to ship end-to-end features across the stackComfort working in fast-paced, iterative environments (they shipped 443 API releases last year!)Familiarity with CI/CD, test automation, code reviews, and modern dev practicesEnthusiastic about shared code ownership, pairing, and collaborative design Bonus Points:Experience with React Native at scaleAWS or Serverless architecture experienceExposure to SwiftUI or wearable techTerraform or Infrastructure-as-Code (e.g., CDK, CloudFormation)Passion for fitness, health, or consumer tech (or even better, you're a runner!) Salary & Benefits:80,00095,000 base salary + generous equityBrand-new MacBook, desk setup budget, free running watchPrivate healthcare, enhanced family leave, and fertility support25 days holiday + bank holidaysWeekly paid time to work out during work hoursBiannual salary reviewsFlexible working: typically 23 days/week in the Vauxhall office Interview Process 45-min call (chat + live Leetcode-style coding)Short take-home task (12 hours)Deep-dive tech interview (system design + architecture Qs)Final team meet & greet with foundersThis is your chance to join early, build real product, and shape the future of a platform loved by a global and growing user basewith all the upside of a startup and the support of an acquisition. Apply now or message Sam Barcia for more details.