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Senior Software Engineer (Backend)

London, UK🌐 Remote💼 Full-time🗓 2026-06-03 → 2026-09-26

Core

Designing and evolving B2B API, personalization, and payments infrastructure for a fintech platform.

Role type

Senior Backend Software Engineer (Payments/Fintech)

Builds

B2B API, payments infrastructure, and personalization features for merchants.

Domain

Fintech / Payments / High-volume transaction systems

Deliverable

production ML models | product features | infrastructure

Required skills

Node.js, TypeScript, NestJS, AWS, Terraform, REST API design, distributed systems, continuous delivery, test automation, containerization fundamentals

Preferred skills

Kubernetes, financial services domain experience, high-scale transaction handling, mentoring

Technologies

Node.js, TypeScript, NestJS, AWS, Kubernetes, Terraform, Amazon EventBridge, SQS

Responsibilities

Spearhead design and evolution of B2B API and payments infrastructure; Collaborate with UX and product teams on discovery and problem-solving; Contribute to engineering-wide initiatives and architecture decisions; Develop deep business and domain understanding for autonomous decision-making; Mentor and support the growth of the engineering community

Seniority

Senior, hands-on IC with mentorship responsibilities

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