IT & Software

Senior Backend Engineer

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London · England · United Kingdom

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

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Reference: WJ-766_22631859

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