Full Stack Software Engineer — Node.js - React.js - JavaScript - London. A leading equities brokerage is rebuilding its core trading platform end-to-end — front and back — and needs an engineer who understands that a system handling billions of dollars in daily flow is not a standard web application. This is a hands-on role embedded in a high-calibre engineering team whose work is used by front-office traders across London, Chicago, and Hong Kong in real time.

You will work across the full stack — building the React interfaces traders rely on and the Node.js services that power them — solving performance, data throughput, and UX challenges that most engineers never encounter, working directly with the trading desk.

What the Full Stack Software Engineer will be doing:

• Design and build high-performance React UIs for real-time equities data — low latency, high data throughput, browser-rendering optimisation
• Design and build the Node.js services and APIs that feed those interfaces, handling high-volume, real-time market data
• Develop and maintain JavaScript libraries and services tailored for demanding financial data display and processing
• Collaborate closely with front-office stakeholders and other engineers to translate trading workflows into robust, intuitive, end-to-end solutions
• Own the quality and architecture of both frontend and backend codebases — with genuine influence over technical direction
• Work within a distributed team across three global offices, with day-to-day presence in London

Requirements for the Full Stack Software Engineer:

• 4+ years of commercial full stack engineering experience, with a strong JavaScript foundation across the stack.
• React expertise
• Node.js experience
• Exposure to financial services, trading systems, or similarly demanding real-time data environments is a genuine advantage — not a requirement, but it will set you apart.
• Strong communicator comfortable working across engineering, product, and trading desk stakeholders

Benefits package includes:

• Bonus up to 25%
• Private medical insurance
• Life insurance
• Pension scheme
• 25 days holiday
• Structured career development
• Wellness benefits including gym membership
• x3 days in the office per week

If you have full stack engineering experience in a high-performance or data-intensive environment and want to work on software that genuinely matters to the people using it, we'd like to hear from you.