Senior React Developer

Senior Full-Stack Engineer Trading Platform (Type Script / Node.js / React)

Location: Waterloo, London (Hybrid)

Our client, a large enterprise, is seeking a Senior Full-Stack Engineer to join an established trading platform programme. This production‑critical system is long‑lived, actively evolving, and places strong emphasis on performance, reliability, and maintainability
. You will join a highly experienced team of senior engineers and QA developers, taking full ownership of features from design through to production, while collaborating directly with the client.

• Design, build, and maintain features across the full stack of a high‑performance trading platform.
• Work primarily with:
  • Type Script (Node.js & React)
  • Monorepo tooling, Git Hub, Git Hub Actions
  • Jest, Playwright
  • Redis, MS SQL, Web Sockets
  • Docker, Kubernetes
  • Observability tools (Grafana, Prometheus, Sonar Qube)
• Take end‑to‑end ownership of features from design to production.
• Collaborate closely with platform and Dev Ops engineers on build pipelines, observability, and operational concerns.
• Communicate directly with clients to clarify requirements and propose solutions.
• Contribute to and improve automated testing practices.
• Participate in peer code reviews and maintain high engineering standards.
• Leverage LLM/AI‑enabled development tools as part of day‑to‑day development.

• Experience with functional programming (OCaml, Haskell).
• Prior experience in trading, finance, or real‑time systems.
• Solid understanding of Dev Ops and operational concerns (logging, metrics, automation).
• London‑based and willing to travel to company/client events.

• 8+ years of professional software development experience.
• 3+ years hands‑on experience with Type Script, Node.js, and React.
• Strong experience building and maintaining production systems.
• Comfortable working in a senior, autonomous engineering team.
• Strong communication skills and fluency in English.
• Hybrid working in Waterloo, London.

• 5 days/year dedicated to training.
• 1,000 annual training allowance (up to 50% usable for home workstation equipment).
• Company equipment and onboarding kit.
• In‑person team events every 3 months.
• Annual bonus (company and personal performance dependent).
• Stock option plan.
• Birthday off.
• Generous employee referral programme.