LORIEN LIMITED
UI Developer (FX Trading Platform)
UI Developer (FX Trading Platform) at LORIEN LIMITED, based in City of London, London. This is a contract role with hybrid working.
- Pay
- Not given by the employer
- Hours and contract
- Contract · Hybrid
- Location
- City of London, London
- Closing date
- Sector
- Software Developer
Reference jobs/152146-UI-Developer-FX-Trading-Platform
About the role
UI Developer (FX Trading Platform)
Hybrid Working - London -50% a week on site.
Financial Services
Lorien's leading banking client is looking for a UI Developer (FX Trading Platform) to join a Front Office IT team supporting electronic trading platforms across Global Markets. The role will focus on developing and enhancing Cortex FX and associated trading applications, delivering high-performance, scalable solutions for real-time pricing and trading.
The Ideal candidate is a technically strong UI Developer with proven JavaScript/TypeScript, Angular, HTML5 and real-time application development experience.
Previous Front Office trading experience, particularly within FX or FX Options, would be highly advantageous. The candidate should be comfortable working in a fast-paced Agile environment, delivering scalable, high-quality trading solutions.
This role is based in London.
This role will be Via Umbrella.
Working in a Hybrid Model of 50% a week on site.
Key Responsibilities
- Design, develop and maintain high-performance UI applications supporting Front Office FX trading platforms.
- Support platform migrations, UI convergence and modernisation initiatives.
- Develop scalable, reusable components using JavaScript, TypeScript, HTML5, CSS and Angular.
- Build responsive applications handling streaming real-time market data.
- Participate in the full Agile development lifecycle, including design, development, testing and deployment.
- Collaborate with developers, architects and stakeholders to establish technical best practices.
- Work with production support teams to ensure application stability, performance and successful releases.
- Contribute to code reviews, technical documentation, architectural decisions and continuous improvement.
- Mentor junior developers and promote software engineering best practices.
Essential Skills & Experience
- Extensive enterprise-level software development experience.
- Strong JavaScript, TypeScript, HTML5 and CSS development skills.
- Experience with Angular, Web Components and modern JavaScript frameworks.
- Strong experience with real-time streaming data and RxJS.
- Experience developing scalable Single Page Applications (SPAs).
- Excellent understanding of software design patterns, clean coding and performance optimisation.
- Experience with Test-Driven Development (TDD), Continuous Integration (CI) and automated testing.
- Strong Agile/Scrum experience.
- Excellent communication, analytical and problem-solving skills.
Desirable Skills & Experience
- Experience developing real-time financial trading applications within Investment Banking.
- Front Office experience across FX, FX Options or Interest Rates products.
- Experience with Cortex or similar electronic trading platforms.
- Knowledge of real-time messaging protocols and market data technologies.
- Experience with application performance profiling and low-latency development.
- Understanding of pricing, trade execution and booking workflows.
- Exposure to Java backend services and .NET technologies.
IND_PC3
Guidant, Carbon60, Lorien & SRG - The Vertage Group Portfolio are acting as an Employment Business in relation to this vacancy.
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Reference: jobs/152146-UI-Developer-FX-Trading-Platform · Posted 3 days ago · Closes 25 Nov 2026 · Listed via LORIEN LIMITED
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