Full Stack UI/UX Developer

JR United Kingdom; London; On-site; GBP 45,000 - 75,000; Full time

Job summary

An established industry player seeks a talented frontend developer with a passion for building high-performance applications. In this role, you will leverage your advanced skills in React and Redux to create responsive user interfaces while optimizing performance and managing real-time data feeds. Your expertise with OpenFin will be crucial as you enhance existing applications and contribute to the financial technology landscape. If you thrive in fast-paced environments and are eager to tackle challenges in a dynamic team, this opportunity is perfect for you.

Qualifications

• 3+ years of production-level coding experience required.
• Solid experience with React and Redux for high-performance UIs.

Responsibilities

• Enhance existing codebase and build responsive UIs with React.
• Debug and support production issues proactively.

Skills

React

Redux

HTML

CSS

WebSocket protocols

Data streaming

Event-driven architectures

Java

Debugging

Automated testing

Education

Bachelor’s degree in Computer Science

Engineering or related field

Tools

OpenFin

Jest

React Testing Library

Job description

Minimum Requirements:

1. Minimum 3+ years of experience writing production-level code
2. Ability to understand, learn and enhance existing codebase is a must
3. Advanced experience with React and Redux
4. Solid experience building responsive, high-performance UIs using React and Redux
5. Experience with OpenFin
6. Prior hands-on experience building or maintaining apps using the OpenFin platform
7. Familiarity with API and window management in OpenFin
8. Strong understanding of WebSocket protocols and managing real-time data feeds
9. Experience handling data streaming and event-driven architectures
10. Strong knowledge of HTML and CSS
11. Java experience is a strong plus
12. Familiarity with high-performance, low-latency frontend systems
13. Experience optimizing rendering performance and handling large datasets in the UI
14. Exposure to financial markets, especially securities trading, is a plus
15. Understanding of trading workflows, market data, or order management systems is a plus
16. Experience with frontend testing frameworks (e.g., Jest, React Testing Library)
17. Understanding of automated testing and CI/CD pipelines is a plus
18. Comfortable with rapid release cycles
19. Proactive in debugging and supporting production issues
20. Bachelor’s degree in Computer Science, Engineering, or related field (or equivalent experience)
21. Overall software development experience of 5+ years