Job Title
Senior Software Engineer
Salary
£75k-£105k + Equity
Company Description
Stairpay is a seed-stage London fintech that raised $1.1M to build the operating system for the future of homeownership. They are streamlining the UK's shared ownership market by providing institutional landlords with the technology to manage large portfolios while helping first-time buyers navigate the path to ownership.
Job Description
Join Stairpay as a production-hardened full-stack engineer to own product domains end-to-end. You will build the financial layer for institutional landlords and a resident-facing app using TypeScript, React, and AWS. This role uniquely blends high-level architectural decision-making with advanced AI orchestration to automate complex regulatory workflows in the property sector.
Location
London, UK
Why this role is remarkable
- Join a high-traction startup already trusted by a third of the industry, including four of the G15 housing associations, at the ground floor.
- Experience a unique "autonomy ladder" engineering culture where you direct AI agents to raise the ceiling of what is possible in software development.
- Influence the roadmap and technical direction directly alongside founders in a small, elite team where your opinions drive immediate product and system changes.
What You Will Do
- Own the entire lifecycle of a domain from concept and architecture to deployment and operation on a stack featuring Next.js, Postgres, and Pulumi.
- Orchestrate and verify AI-generated code, ensuring high-integrity invariants for money-movement paths and complex regulatory document ingestion workflows.
- Work directly with housing associations to translate complex manual workflows into a unified ledger system that eliminates data reconciliation across disparate platforms.
The ideal candidate
- Proven senior full-stack experience shipping and operating complete systems using TypeScript, React, and AWS in a production-hardened, high-stakes environment.
- Deep expertise in database schema design and query optimization for systems where financial "domain correctness" and ledger integrity are absolutely non-negotiable.
- A product-first mindset with the engineering judgment to override AI models and design the durable guardrails that define what "correct" means for our sector.
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Senior Software Engineer (£75k-£105k + Equity) at Stairpay employer: Jack & Jill
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