Full-stack React Developer

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

Location: Waterloo, London (Hybrid)

Overview

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.

Key Responsibilities

• Design, build, and maintain features across the full stack of a high‑performance trading platform.
• Work primarily with: TypeScript (Node.js & React), monorepo tooling, GitHub, GitHub Actions, Jest, Playwright, Redis, MS SQL, WebSockets, Docker, Kubernetes, observability tools (Grafana, Prometheus, SonarQube).
• Take end‑to‑end ownership of features from design to production.
• Collaborate closely with platform and DevOps 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.

Desirable

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

Qualifications

• 8+ years of professional software development experience.
• 3+ years hands‑on experience with TypeScript, 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.
• Availability to work in a hybrid setting in Waterloo, London.

Why Is This a Great Opportunity

• 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.

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