Senior Backend Engineer

London, UK (Hybrid) or Remote (UK) Full-time Posted 28 Jul 2026

We're looking for a senior backend engineer to take ownership of the platform's infrastructure: our API layer, payment integrations, and database design. As a solo-founder company, this is a senior, self-directed role with real technical authority. You'll work directly with our founder to make architecture decisions and set the foundations the platform will scale on.

Responsibilities

• Design and own robust, well-tested APIs using Node.js and TypeScript
• Own our Stripe integration and other payment and third-party service connections
• Design and maintain the database schema and migrations
• Make and document infrastructure and architecture decisions with our founder
• Monitor, secure, and improve system performance and reliability

Requirements

• 5+ years of experience with Node.js and TypeScript, including system design
• Strong knowledge of SQL and database design (PostgreSQL preferred)
• Experience building and securing REST APIs handling real payments or sensitive data
• Comfortable owning infrastructure decisions with minimal oversight

Nice to have

• Experience with Supabase or a similar BaaS
• AWS or other cloud infrastructure experience
• Experience with event-driven architecture
• Experience in an early-stage startup or as a founding engineer