Lead Software Engineer for Digital Platforms Team

Testing Site - JPMC; Greater London; On-site; GBP 120,000 - 160,000; Full time

Job summary

JPMorganChase seeks a Lead Software Engineer to join the Digital Platforms Team. You will be a core technical contributor, shaping scalable React products with a focus on performance, accessibility, and secure, maintainable architectures.

You will lead cross-functional collaboration with product, design, and backend teams, mentor engineers, and drive platform-thinking across projects using data and observability.

Qualifications

• 10+ years of UI/frontend experience with React in production.
• Platform mindset with focus on performance and Core Web Vitals improvements.
• Advanced React and TypeScript with SSR/SSG experience (e.g., Next.js).
• Experience with accessible design and WCAG standards.
• Strong testing and CI/CD practices (Jest, Playwright/Cypress).

Responsibilities

• Architect scalable, resilient UI platforms and modular React architectures.
• Lead performance engineering with budgets, bundle strategy, caching, and image optimization.
• Build and govern reusable component libraries and design systems.
• Enforce code quality, testing, accessibility, and security hygiene.
• Provide cross-functional leadership and mentorship across product, design, and backend teams.

Skills

React expertise

Frontend development

TypeScript

UI architecture

State management

Accessibility

Testing & CI/CD

Tools

Redux Toolkit

Zustand

React Query

GraphQL

Next.js

Job description

We have an opportunity to impact your career and provide an adventure where you can push the limits of what's possible.

As a Lead Software Engineer at JPMorganChase within the Digital Platforms Team youare an integral part of an agile team that works to enhance, build, and deliver trusted market-leading technology products in a secure, stable, and scalable way. As a core technical contributor, you are responsible for conducting critical technology solutions across multiple technical areas within various business functions in support of the firm’s business objectives.

Job responsibilities

• Architect scalable, resilient UI platforms -Define and evolve clean, modular React architectures (state management, routing, SSR/SSG, hydration) that scale across teams and products, emphasizing maintainability, resiliency, and long-term sustainability.
• Lead performance engineering - Set and enforce performance budgets and Web Vitals targets; drive bundle strategy (code splitting, lazy loading), caching/CDN policies, image optimization, profiling, and regression monitoring to ensure consistently fast, reliable experiences.
• Build and govern reusable component libraries and design systems - Develop typed, accessible, and themeable React component libraries; establish versioning, documentation, and adoption guidelines to promote reuse, consistency, and platform-wide efficiency.
• Enforce code quality, testing, and accessibility - Establish coding standards and review practices; implement robust testing (unit/integration/E2E) and CI coverage; ensure WCAG-compliant accessibility and front-end security hygiene throughout the platform.
• Provide cross-functional leadership and mentorship - Translate product and UX requirements into technical roadmaps; collaborate tightly with product, design, and backend teams; mentor engineers in platform-thinking and React best practices; use data and observability to guide decisions and drive continuous improvement.

Required qualifications, capabilities, and skills

• 10+ years in UI and frontend development with React Proven track record building and scaling complex, production-grade React applications across multiple products and teams.
• Demonstrated platform mindset with strong focus on performance -Emphasis on clean architecture, robustness, resiliency, reusability, and measurable improvements to Core Web Vitals.
• Advanced React and TypeScript expertise -Deep knowledge of hooks, context, Suspense/concurrent features, SSR/SSG patterns (e.g., Next.js), and strict typing for safety and maintainability.
• UI architecture and systems design -Ability to define scalable component architectures, design systems, modular libraries, and (where appropriate) micro frontends or module federation.
• State management and data layer proficiency -Experience with Redux Toolkit, Zustand, React Query/TanStack Query, and GraphQL, including caching, synchronization, and error handling strategies.
• Accessibility and standards compliance -WCAG compliance, semantic HTML, keyboard navigation, screen-reader support, and inclusive design integrated into the development workflow.
• Testing, tooling, and CI/CD excellence -Strong in unit/integration/E2E testing (Jest, Testing Library, Playwright/Cypress), code quality gates, linting, type checks, and modern bundlers/dev servers (Webpack, Vite) with automated, reliable release pipelines.