Senior Frontend Developer - React

Senior Frontend Developer (React, FinTech) - Permanent - London (2 days a week) - £80 - 100k per annum

Our client is a technology company within the financial services sector seeking a Senior Frontend Developer to join their developer team. This is a senior individual contributor role focused on building interfaces that make complexity feel simple for financial professionals.

You will spend 80% of your time hands-on building the UI for our core platform. The remaining 20% will focus on technical design, raising standards, and shaping our frontend architecture.

What You'll Own:

• Frontend systems development: UI components, state management, design systems, API integration, and real-time data handling.
• Code Quality & Standards: Driving frontend engineering practices, writing exemplar code, and proactively managing technical debt.
• Technical Design: Translating architectural patterns into pragmatic UI solutions, making framework and library decisions.

Your Technical Background Should Include:

• 5+ years in frontend development, with a proven track record delivering financial services solutions .
• Expert-level proficiency in React with a deep understanding of component-based architectures and design patterns.
• Deep understanding of FinTech UI requirements —including data security, audit trail displays, complex financial workflows, and regulatory compliance interfaces.
• Proven track record consuming RESTful and event-driven APIs , implementing authentication/authorization, and handling real-time data (e.g., WebSockets, Server-Sent Events).
• Strong experience with accessibility ( WCAG compliance ) and performance optimization strategies (e.g., lazy loading, code splitting, runtime profiling).
• Experience building and maintaining Design Systems (component libraries, design tokens, documentation, versioning).