Full job description 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.


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Guidant, Carbon60, Lorien & SRG - The Vertage Group Portfolio are acting as an Employment Business in relation to this vacancy.