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UI Developer Lead

Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone's chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious…

Inside IR35 Hybrid IT
Pay rate £850/day
Contract type Contract
Posted 16 June 2026

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About this contract

Inside IR35

Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone's chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive.

Job Title: UI Developer Lead

Location: Bromley - Hybrid (3 days in office)

Contract: 12 months with possible extension.

Rate: £850 inside umbrella

Description:

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.
Strong proficiency in React (Hooks, Context API, Redux or similar state management); RxJS for reactive programming and event-driven architectures
Core Expertise:
o Strong proficiency in React (Hooks, Context API, Redux or similar state management).
o Advanced knowledge of RxJS for reactive programming and event-driven architectures.
UI Technologies:
o HTML5, CSS3, TypeScript, Vite, OpenFin etc.
o Experience with real-time data visualization and WebSockets.

Architecture Design:
o Micro-frontend architecture, modular design principles.
Testing Quality:
o Vitest , Playwright, Storybook or similar testing frameworks.
Financial Domain Knowledge:
o 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.

Adecco is a disability-confident employer. It is important to us that we run an inclusive and accessible recruitment process to support candidates of all backgrounds and all abilities to apply. Adecco is committed to building a supportive environment for you to explore the next steps in your career. If you require reasonable adjustments at any stage, please let us know and we will be happy to support you.

We use generative AI tools to support our candidate screening process. This helps us ensure a fair, consistent, and efficient experience for all applicants. Rest assured, all final decisions are made by our hiring team, and your application will be reviewed with care and attention

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