2152 IT & Software Developer jobs in the UK
Senior React Engineer
£30,500 - 104,500
Intec Select Ltd
Courtfield Avenue 70, Courtfield
£30,500 - 104,500
Requirements
Must:
- 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
- Experience deploying apps to the Apple App Store (desirable)
- Knowledge of web security best practices and cyber threat mitigation (desirable)
- Familiarity with microservices and REST API architecture (desirable)
- Exposure to Infrastructure as Code tools (e.g. Terraform) (desirable)
- Experience working with real-time trading or data visualisation platforms (desirable)
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
Description
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. This is an initial 6-month contract with a high possibility of extension, located on-site in Central London, and we offer up to £800 per day, dependent on the level of experience.
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You can find JavaScript Developer salaries in the UK here.
How many JavaScript Developer jobs are in the UK?
Currently, there are 2152 JavaScript openings. Check also: React jobs, Angular jobs, Vue jobs, TypeScript jobs, NodeJS jobs - all with salary brackets.
Is the UK a good place for JavaScript Developers?
The UK is one of the best countries to work as a JavaScript Engineer. It has a vibrant startup community, growing tech hubs and, most important: lots of interesting jobs for people who work in tech.
Which companies are hiring for JavaScript Developer jobs in the UK?
Bluefruit Software Limited, Mas & Pas Limited, Phoenix Group, FCDO Services, Access4, ITI Group, Alliance Automotive UK Ltd among others, are currently hiring for JavaScript roles in the UK.
The company with most openings is Experis as they are hiring for 99 different JavaScript Developer jobs in the UK. They are probably quite committed to find good JavaScript Developers.
The company with most openings is Experis as they are hiring for 99 different JavaScript Developer jobs in the UK. They are probably quite committed to find good JavaScript Developers.