Senior React Developer
<p><b>Salary: £30,500 - 104,500 per year</b></p>
<b>Requirements:</b>
<ul><li>5+ years of experience in frontend/UI engineering, with a focus on performance and scale</li><li>Deep expertise in React, TypeScript, and JavaScript</li><li>Strong understanding of WebSocket integration, low-latency data streaming, and threading</li><li>Experience troubleshooting data-heavy UIs and optimising load times</li><li>Familiarity with tools like Redis, Kafka, and cloud platforms such as Azure or AWS</li><li>Proficient in Git and modern source control workflows</li><li>Knowledge of performance diagnostics (e.g. Google PageSpeed Insights) and responsive UI optimisation</li></ul>
<b>Responsibilities:</b>
<ul><li>Design, build, and maintain a React/TypeScript trading UI, delivering real-time streaming data and a seamless user experience</li><li>Integrate the UI with RESTful and streaming APIs (built in Rust and Python)</li><li>Own performance improvements across dashboards, widgets, and live data visualisation</li><li>Collaborate with QA and DevOps to enhance automated testing and deployment pipelines</li><li>Lead efforts in securing, scaling, and monitoring the frontend environment</li><li>Use observability tools (Prometheus, Grafana, Loki) to monitor UI health and performance</li><li>Drive UI architectural decisions, performance benchmarking, and best practice implementation</li></ul>
<b>Technologies:</b>
<ul><li>AWS</li><li>Azure</li><li>Cloud</li><li>DevOps</li><li>Frontend</li><li>Git</li><li>Grafana</li><li>JavaScript</li><li>Kafka</li><li>Prometheus</li><li>Python</li><li>React</li><li>Redis</li><li>Rust</li><li>TypeScript</li><li>UX UI Design</li></ul>
<p><b>More:</b></p>
<p>We are hiring a Senior React Engineer to join our high-performance technology team within a leading financial services organisation operating in the oil and energy derivatives space. Our business runs a cutting-edge electronic trading platform that serves both internal trading teams and external clients, offering low-latency, highly reliable trading access via a modern UI. We are looking for a self-starter who takes ownership of technical challenges and delivers robust solutions, with the ability to work under pressure in a fast-moving trading environment. You must also be a collaborative team player who communicates clearly and contributes to a high-quality engineering culture. This role offers a competitive package of up to £140,000, with an up to 20% bonus and excellent corporate benefits, all based in Central London.</p>
<p>last updated 8 week of 2026</p>
<b>Requirements:</b>
<ul><li>5+ years of experience in frontend/UI engineering, with a focus on performance and scale</li><li>Deep expertise in React, TypeScript, and JavaScript</li><li>Strong understanding of WebSocket integration, low-latency data streaming, and threading</li><li>Experience troubleshooting data-heavy UIs and optimising load times</li><li>Familiarity with tools like Redis, Kafka, and cloud platforms such as Azure or AWS</li><li>Proficient in Git and modern source control workflows</li><li>Knowledge of performance diagnostics (e.g. Google PageSpeed Insights) and responsive UI optimisation</li></ul>
<b>Responsibilities:</b>
<ul><li>Design, build, and maintain a React/TypeScript trading UI, delivering real-time streaming data and a seamless user experience</li><li>Integrate the UI with RESTful and streaming APIs (built in Rust and Python)</li><li>Own performance improvements across dashboards, widgets, and live data visualisation</li><li>Collaborate with QA and DevOps to enhance automated testing and deployment pipelines</li><li>Lead efforts in securing, scaling, and monitoring the frontend environment</li><li>Use observability tools (Prometheus, Grafana, Loki) to monitor UI health and performance</li><li>Drive UI architectural decisions, performance benchmarking, and best practice implementation</li></ul>
<b>Technologies:</b>
<ul><li>AWS</li><li>Azure</li><li>Cloud</li><li>DevOps</li><li>Frontend</li><li>Git</li><li>Grafana</li><li>JavaScript</li><li>Kafka</li><li>Prometheus</li><li>Python</li><li>React</li><li>Redis</li><li>Rust</li><li>TypeScript</li><li>UX UI Design</li></ul>
<p><b>More:</b></p>
<p>We are hiring a Senior React Engineer to join our high-performance technology team within a leading financial services organisation operating in the oil and energy derivatives space. Our business runs a cutting-edge electronic trading platform that serves both internal trading teams and external clients, offering low-latency, highly reliable trading access via a modern UI. We are looking for a self-starter who takes ownership of technical challenges and delivers robust solutions, with the ability to work under pressure in a fast-moving trading environment. You must also be a collaborative team player who communicates clearly and contributes to a high-quality engineering culture. This role offers a competitive package of up to £140,000, with an up to 20% bonus and excellent corporate benefits, all based in Central London.</p>
<p>last updated 8 week of 2026</p>