Full Stack Engineer

Senior Full-Stack Software Engineer (TypeScript) - Senior full-stack role with real ownership from design through to production - TypeScript, Node.js, React, Fastify, AWS SNS/SQS, MongoDB - Fully remote (UK-based) - £70,000 - £90,000 depending on experience - Technically challenging problems in identity, compliance and risk intelligence About the Company Our client builds next-generation identity, entity resolution and risk intelligence platforms used by banks, governments and regulated organisations. Their software processes millions of records through asynchronous, event-driven pipelines, integrating specialist data providers and powering compliance workflows where correctness, transparency and performance are non-negotiable. It is a small, high-trust engineering team with significant influence over architecture and technical direction… the kind of environment where good engineers thrive and their work genuinely matters. The Role You will join a small engineering team working on genuinely complex distributed systems, not straightforward CRUD applications. The platform spans Fastify microservices, React frontends, AWS event-driven pipelines and integrations with specialist identity and payments providers. You will take ownership of services end-to-end: from API design and data modelling through to testing, observability and production deployment. There is real influence here over architecture and engineering standards, and you will mentor other engineers through code review and technical collaboration. If you are excited by modern TypeScript, distributed systems and high-trust ownership, you will fit in well. Key Responsibilities - Design, build and ship features across the full stack using Fastify, React/MUI and shared TypeScript packages within a pnpm monorepo - Build and extend event-driven pipelines on AWS SNS/SQS for asynchronous screening, auditing and workflow automation, including idempotent consumers and dead-letter queues - Own services end-to-end, from API design and MongoDB data modelling through testing, observability and production deployment - Build secure systems with JWT/OIDC authentication, fine-grained authorisation, resource ownership validation and compliance-grade audit logging - Integrate external identity, KYC and payments platforms including Senzing, Data Universe, Auth0 and Stripe - Contribute to architectural decisions and engineering standards across multiple products - Write high-quality automated tests using Vitest and Playwright as part of everyday development - Mentor other engineers through code reviews, technical discussions and collaborative problem solving - Continuously improve developer experience, tooling and deployment pipelines What You'll Need Essential - 5+ years of professional software engineering experience - Strong TypeScript, Node.js and React skills - Experience designing, building and operating production backend services - Solid understanding of REST APIs, authentication/authorisation and data modelling with MongoDB or equivalent - Experience building event-driven or message-based systems using AWS SNS/SQS, Kafka, RabbitMQ or similar - Good testing practices across unit, integration and end-to-end levels - Comfortable taking ownership of loosely defined features from concept through to production - Strong communication skills and the ability to work effectively in a small, highly collaborative team Nice to have - AWS experience including EKS/Kubernetes, Helm, S3 and IAM - Background in compliance, KYC/AML, fintech or other regulated industries - Experience with monorepos (pnpm, TurboRepo) and GitHub Actions CI/CD Why Apply? - £70,000 - £90,000 salary (full-time) or equivalent day rate (contract) - Fully remote, UK-based - Full-time or contract engagement considered - High autonomy and genuine ownership… you will shape architecture, not just implement tickets - Small, high-trust team with minimal bureaucracy and direct influence over technical direction - Technically complex, meaningful work in the identity and risk intelligence space - Work on distributed systems, graph intelligence and AI-assisted compliance workflows Interested? Connect with Ryan Quinn on LinkedIn or send your CV to [email protected] with a brief note on your background.