Mobile App Developer (React Native + Node.js)

Mobile App Developer (React Native + Node.js) – Future CTO Potential Location: Remote (UK preferred) Salary: £50k–£60k (flexible depending on experience) Tech Stack: React Native, Node.js, AI, Video Processing Looking for your next big opportunity to own a product from the ground up? Join a pioneering sports tech start-up building an AI-powered mobile coaching app for skiers — helping users improve technique through video analysis and real-time feedback. This is not a typical dev job — you’ll be working on something genuinely innovative, using joint-tracking tech, video streaming, and AI-powered coaching, with a roadmap toward becoming the CTO. About the App The app (with an early prototype already built) allows users to upload skiing videos, analyse movement using joint-tracking technology, and receive constructive feedback through an AI-powered chat assistant. You’ll help transform this into a fully functional, scalable product ahead of the next ski season. About the Role You’ll lead full-stack development (React Native + Node.js), collaborating closely with the founders and UX designer in an iterative, design-driven process. This is a greenfield opportunity where you’ll shape the technical architecture, development roadmap, and future team. Key responsibilities: * Develop and own the mobile app front to back (React Native + Node.js) * Build scalable APIs, cloud infrastructure, and CMS integrations * Work from Figma prototypes through to production code * Integrate AI tools and video analysis engines into a seamless user experience * Optimise joint-tracking tech for accuracy and real-world performance * Set the foundation for future team growth and CTO-level leadership Some UK travel may be needed for testing on indoor/dry ski slopes. What We’re Looking For We’re seeking a senior developer (or strong full-stack engineer) ready to take ownership and step into a leadership role. Essential skills and experience: * Proven experience building production-grade mobile apps (ideally with React Native) * Strong back-end development with Node.js and scalable cloud infrastructure (AWS, GCP or Azure) * Comfortable with relational (PostgreSQL) and NoSQL (Firestore) databases * Experience with video capture, playback, and media handling on mobile * Understanding of AI integration, or willingness to learn rapidly * Comfortable working independently in a fast-moving start-up environment Nice to have: * Experience with LLM-based chat agents or feedback generation tools * Background in joint-tracking, movement analysis, or sports tech * Familiarity with CMS platforms (e.g. Contentful, Strapi) and dynamic content workflows * An interest in skiing, coaching, or sports performance apps Why Join? * Full ownership of an exciting greenfield product * Opportunity to progress into a CTO role * Flexible working hours and remote-first culture * Input into technical decisions, roadmap, and team structure * Bespoke benefits and possible equity or share options Apply Now If you’re ready to build something innovative with real-world impact — and you want to play a leading role in its success — we’d love to hear from you