Senior Frontend Engineer / Senior Full-Stack (frontend-focused) — TypeScript · React · Next.js · Nod

Sole senior engineer on the modernisation of a UK commodity-trading platform, working directly with the client's Financial Director. Owned architecture, delivery and operations across the legacy system and its greenfield replacement.

• Architected and built the greenfield vNext platform: 13 NestJS/Fastify microservices across 9 DDD bounded contexts (~250,000 lines of TypeScript), multi-tenant security (OIDC/SSO, RBAC, fail-closed tenant isolation), GitOps delivery on Kubernetes (ArgoCD, canary releases with automatic SLO-gated rollback), OpenTelemetry/Grafana observability, Terraform — from empty repository to a live multi-tenant environment in four months.
• Built a 98-component React/TypeScript design system (design tokens, six themes, Storybook, automated accessibility gates) and the trading/finance front end on top of it (React 18, React Query, Vite).
• Legacy modernisation: Clean Architecture refactor of the Express/TypeORM monolith, Webpack → Vite migration, multi-environment Terraform with secretless GitHub OIDC, Playwright E2E with 4-way sharded execution.
• AI-native delivery: governed Claude Code workflow (spec → failing tests → implement → independent automated verification) sustaining ~780 merged PRs in 7 months; self-healing production agent on the Claude Agent SDK that diagnoses errors and opens fix PRs behind budget caps and human approval gates.

Led application and front-end architecture across three enterprise deliveries; mentored engineers and drove architecture decision records.

• Solar-energy production platform (2024–2025) — Tech Lead / Software Architect: Node.js modular monolith on Azure with serverless components, Docker; introduced AI-native development practices to the delivery.
• E-commerce & payment-processing platform (2022–2024) — front-end architecture: Next.js micro-frontends, TypeScript, AWS, Docker.
• Big-data deduplication platform (2021–2022) — front-end architecture: Angular, NgRx, Nx, reactive architecture, AWS, Docker.

Led front-end development of a fintech portfolio-management application: React, Redux, RxJS, TypeScript, Nx monorepo, Jenkins CI. Performance optimisation; collaborated on architecture decision records guiding the platform's modernisation.

Grew from medior engineer to Tech Lead; led cross-functional teams building scalable web applications, maintained a microservices architecture and delivered cloud-native solutions on AWS and Azure; contributed to architecture decision records.

• E-commerce portal (2020–2021) and group-buy shop (2019–2020): Next.js, Redux, TypeScript, Docker, Terraform, AWS, Jenkins, Jest.
• VoetbalTV (2017–2019) — greenfield hybrid-mobile social platform for amateur football: Ionic, Angular, RxJS, NgRx, Node.js/Express, Serverless Framework, AWS Lambda + DynamoDB.
• Media-domain application (2016–2017) — legacy hybrid mobile app: Cordova, TypeScript, KnockoutJS.

JavaScript engineering on client web applications.

Front-end development on enterprise web applications.

Front-end development for agency web projects.

Professional certification, not an academic degree. Skills- and experience-based profile: 13+ years in production engineering, no university degree.