Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Design and maintain a cutting-edge React trading UI for real-time data.
- Company: Leading financial services firm in the oil and energy derivatives sector.
- Benefits: Competitive daily rate, potential contract extension, and dynamic work environment.
- Why this job: Join a high-performance team and make an impact in a fast-paced trading environment.
- Qualifications: 5+ years in frontend engineering with strong React and TypeScript skills.
- Other info: On-site role in Central London with excellent career growth opportunities.
The predicted salary is between 50400 - 67200 £ per year.
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. You must also be a collaborative team player who communicates clearly and contributes to a high-quality engineering culture.
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
Desirable Skills and Experience
- Experience deploying apps to the Apple App Store
- Knowledge of web security best practices and cyber threat mitigation
- Familiarity with microservices and REST API architecture
- Exposure to Infrastructure as Code tools (e.g. Terraform)
- Experience working with real-time trading or data visualisation platforms
Package: Initial 12 month contract (high possibility of extension) Up to £800 p/day (dependent on level of experience) On-site (Central London)
Senior React Js Engineer in London employer: Intec Select
Contact Detail:
Intec Select Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior React Js Engineer in London
✨Tip Number 1
Network like a pro! Reach out to your connections in the tech and finance sectors. Attend meetups or webinars related to React and trading platforms. You never know who might have the inside scoop on job openings!
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your best React projects, especially those that highlight performance and real-time data handling. This will give potential employers a taste of what you can bring to their team.
✨Tip Number 3
Prepare for technical interviews by brushing up on your React and TypeScript knowledge. Practice coding challenges and be ready to discuss your past projects in detail. We want to see how you tackle problems and deliver solutions!
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets noticed. Plus, we love seeing candidates who take the initiative to connect directly with us. Don’t miss out on this opportunity!
We think you need these skills to ace Senior React Js Engineer in London
Some tips for your application 🫡
Tailor Your CV: Make sure your CV highlights your experience with React, TypeScript, and any relevant projects. We want to see how your skills align with the role, so don’t be shy about showcasing your achievements!
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Use it to explain why you’re the perfect fit for our team. Mention specific experiences that relate to the job description and show us your passion for frontend engineering.
Showcase Your Problem-Solving Skills: In your application, include examples of how you've tackled technical challenges in the past. We love self-starters who take ownership, so let us know how you’ve delivered robust solutions under pressure.
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you don’t miss out on any important updates from our team!
How to prepare for a job interview at Intec Select
✨Know Your Tech Stack Inside Out
Make sure you’re well-versed in React, TypeScript, and JavaScript. Brush up on your knowledge of WebSocket integration and low-latency data streaming, as these are crucial for the role. Be ready to discuss your past projects and how you tackled performance issues.
✨Showcase Your Problem-Solving Skills
Prepare to share specific examples of how you've taken ownership of technical challenges. Think about times when you improved UI performance or optimised load times. This will demonstrate your ability to deliver robust solutions under pressure.
✨Communicate Clearly and Collaboratively
As a team player, it’s important to show that you can communicate effectively with both technical and non-technical colleagues. Practice explaining complex concepts in simple terms, and be ready to discuss how you’ve collaborated with QA and DevOps in the past.
✨Familiarise Yourself with Observability Tools
Since the role involves using tools like Prometheus, Grafana, and Loki, make sure you understand how they work and their importance in monitoring UI health and performance. Being able to discuss your experience with these tools will set you apart from other candidates.