Software Engineer - Payments/Fintech

• Designing and building on AWS using serverless-first architecture
• Working across the stack: APIs, data, integrations, and infrastructure
• Integrating third-party services; payment processors, KYC/KYB providers, fraud platforms, banking APIs
• Building secure, PCI-aware systems fit for a regulated payments environment
• You won’t be building everything solo. Third-party engineering teams handle a lot of the heavy infrastructure/DevOps build, so you’re directing and reviewing that work rather than carrying it all yourself

What’s in it for your

• Genuine equity/options, a real stake in the business, not a token gesture
• Direct access to and mentorship from the CTO, not buried in a large engineering org
• Real scope for growth as the team scales
• The chance to shape a modern engineering function

• Around 5 years’ experience as a backend/full-stack engineer, ideally with some Front End exposure (Node.js/Next.js)
• Payments or fintech background essential. Exposure to card payments, PSPs, acquiring, or scheme/issuer processing
• Strong AWS experience (serverless, API Gateway, relational databases; Postgres/Aurora)
• Comfortable working independently, with real ownership rather than a rigid ticket queue
• Bonus: familiarity with PayFac, ISO, or payment gateway architecture

Our client is a growing UK payments technology company building out its in-house engineering function from the ground up. This is a rare chance to join early, work directly alongside the CTO, and genuinely shape how the platform is built. not just execute a backlog.