Senior React Engineer
Posted Today by Intec Select
£100 Per hour
Undetermined
Onsite
London Area, United Kingdom
Summary: The Senior React Engineer will join a high-performance technology team within a leading financial services organization focused on oil and energy derivatives. This role involves designing and maintaining a React/TypeScript trading UI, integrating it with APIs, and ensuring optimal performance in a fast-paced trading environment. The ideal candidate will have extensive experience in frontend engineering and a strong understanding of low-latency data streaming. This position is on-site in Central London and offers a competitive daily rate.
Key Responsibilities:
- Design, build, and maintain a React/TypeScript trading UI, delivering real-time streaming data and a seamless user experience
- Integrate the UI with RESTful and streaming APIs (built in Rust and Python)
- Own performance improvements across dashboards, widgets, and live data visualisation
- Collaborate with QA and DevOps to enhance automated testing and deployment pipelines
- Lead efforts in securing, scaling, and monitoring the frontend environment
- Use observability tools (Prometheus, Grafana, Loki) to monitor UI health and performance
- Drive UI architectural decisions, performance benchmarking, and best practice implementation
Key Skills:
- Degree in Computer Science, Engineering, or a related field
- 5+ years of experience in frontend/UI engineering, with a focus on performance and scale
- Deep expertise in React, TypeScript, and JavaScript
- Strong understanding of WebSocket integration, low-latency data streaming, and threading
- Experience troubleshooting data-heavy UIs and optimising load times
- Familiarity with tools like Redis, Kafka, and cloud platforms such as Azure or AWS
- Proficient in Git and modern source control workflows
- Knowledge of performance diagnostics (e.g. Google PageSpeed Insights) and responsive UI optimisation
Salary (Rate): £800.00 daily
City: London
Country: United Kingdom
Working Arrangements: on-site
IR35 Status: undetermined
Seniority Level: Senior
Industry: IT
Senior React Engineer - £700 - £800 p/day – On-site (Central London)
Overview
We are hiring a Senior React Engineer to join a high-performance technology team within a leading financial services organisation operating in the oil and energy derivatives space. The 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.
Role & Responsibilities
- Design, build, and maintain a React/TypeScript trading UI, delivering real-time streaming data and a seamless user experience
- Integrate the UI with RESTful and streaming APIs (built in Rust and Python)
- Own performance improvements across dashboards, widgets, and live data visualisation
- Collaborate with QA and DevOps to enhance automated testing and deployment pipelines
- Lead efforts in securing, scaling, and monitoring the frontend environment
- Use observability tools (Prometheus, Grafana, Loki) to monitor UI health and performance
- Drive UI architectural decisions, performance benchmarking, and best practice implementation
Essential Skills and Experience
- Degree in Computer Science, Engineering, or a related field
- 5+ years of experience in frontend/UI engineering, with a focus on performance and scale
- Deep expertise in React, TypeScript, and JavaScript
- Strong understanding of WebSocket integration, low-latency data streaming, and threading
- Experience troubleshooting data-heavy UIs and optimising load times
- Familiarity with tools like Redis, Kafka, and cloud platforms such as Azure or AWS
- Proficient in Git and modern source control workflows
- Knowledge of performance diagnostics (e.g. Google PageSpeed Insights) and responsive UI optimisation
Package:
- Initial 6 month contract (high possibility of extension)
- Up to £800 p/day (dependent on level of experience)
- Up to 20% bonus
- Excellent corporate benefits
- On-site (Central London)