UI Lead

Ascendion; City Of London; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

A leading financial technology firm seeks a UI Lead to drive the development of their Single Dealer Platform. The candidate will utilize expertise in React and RxJS to create robust, high-performance trading interfaces. Responsibilities include leading a team, collaborating with various stakeholders, and ensuring integration with backend services. Ideal candidates will have strong leadership, communication skills, and a thorough understanding of the financial domain. The position offers a hybrid working model.

Qualifications

• Strong proficiency in React with hooks and state management.
• Advanced RxJS knowledge for event-driven applications.
• Experience with HTML5, CSS3, TypeScript and real-time data.

Responsibilities

• Own the front-end architecture design for the platform.
• Collaborate with cross-functional teams for user experiences.
• Guide and mentor UI engineers to ensure coding best practices.

Skills

React

RxJS

Leadership

UI Technologies

Problem-solving

Tools

Vitest

Playwright

Storybook

Job description

Title: UI Lead
Location: Bromley, UK

Job Type: Hybrid 3/Day WFO

Job Description:

We are seeking a highly skilled UI Developer to spearhead the development of the Single Dealer Platform within our Electronic Fixed Income & Currencies business. The ideal candidate will have deep expertise in React, RxJS, and modern UI frameworks, combined with strong leadership and architectural skills to deliver high-performance, scalable, and intuitive trading interfaces.

Key Responsibilities:

• Lead UI Development: Own the design and implementation of the front-end architecture for the SDP.
• Collaborate with Stakeholders: Work closely with product managers, UX designers, and backend teams to deliver seamless user experiences.
• Technical Leadership: Mentor and guide a team of UI engineers, ensuring best practices in coding, testing, and performance optimization.
• Integration: Ensure smooth integration with Java-based backend services and real-time data streams.
• Performance & Scalability: Optimize UI for low-latency, high-frequency trading environments.
• Innovation: Stay ahead of emerging technologies and propose improvements to enhance platform capabilities.

Required Skills & Experience:

Core Expertise:

• Strong proficiency in React (Hooks, Context API, Redux or similar state management).
• Advanced knowledge of RxJS for reactive programming and event-driven architectures.

UI Technologies:

• HTML5, CSS3, TypeScript, Vite, OpenFin etc.
• Experience with real-time data visualization and WebSockets.

Architecture & Design:

• Micro-frontend architecture, modular design principles.

Testing & Quality:

• Vitest , Playwright, Storybook or similar testing frameworks.

Financial Domain Knowledge:

• Understanding of Fixed Income, FX, and electronic trading workflows is highly desirable.

Soft Skills:

• Strong leadership and communication skills.
• Ability to work in a fast-paced, agile environment.
• Problem-solving mindset with attention to detail