Senior backend engineer owning the platform's API layer, Stripe payment integrations, and database design at a solo-founder company, working directly with the founder on architecture and infrastructure decisions. Core stack: Node.js, TypeScript, and PostgreSQL; hybrid in London or remote within the UK.
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