Frontend Engineer
- Compensation
- £85K–£105K
- Location
- London
- Work setup
- Not specified
- Seniority
- Not specified
- Employment
- Contract
- Experience
- 5+ years
- Category
- Frontend
- Posted
Skills
Must have
- 5+ years in front-end engineering with deep React and TypeScript experience.
- Experience shipping data-dense enterprise interfaces, with the ability to explain the grids, dashboards and state decisions behind them.
- Strong grasp of state management and front-end security, including XSS, CSRF and CSP.
- Solid testing discipline.
- Experience building SaaS or multi-tenant products, with Git, CI/CD and cloud deployment.
- Daily use of AI coding tools such as Cursor or Claude Code, and a considered view of where they help.
- A degree in engineering, computer science or a related field, or equivalent experience.
- React Native experience is valued.
Nice to have
- Interfaces for AI-assisted or agentic products.
- Micro-frontends, including Module Federation or comparable approaches.
- Contribution to or ownership of a design system.
- Financial data visualisation.
Full description
Frontend Engineer
Location: Kings Cross, London
Salary: £85,000-105,000
Contract: Permanent
Working pattern: On site, 3 days a week
A new software venture built inside an established global provider of analytical and research services to the private capital industry is hiring Front-End Engineers to build the interfaces investment professionals use to inspect data, work with documents and direct AI agents. You'll join the UK core team of around thirty people, working in React, React Native and TypeScript on data-dense enterprise surfaces and AI-assisted workflows. The role sits within a nine-person engineering cohort being hired across front-end and back-end, reporting to the Head of Engineering.
THE ROLE
You'll report to the Head of Engineering and contribute to a shared component system that can be themed across tenants. The work combines data-heavy enterprise interfaces with the performance and interaction design that AI-assisted workflows demand.
- The hard part is trust and clarity: users need to check an answer quickly and follow a long-running workflow while it is still in progress.
- Part of a nine-person engineering cohort being hired across front-end and back-end.
- Based with the UK core team of around thirty people in Kings Cross, alongside colleagues in London and India.
WHAT YOU'LL BE DOING
Your remit spans the product surfaces, the AI experience, the shared platform and the quality bar.
- Build advanced forms, analytics dashboards, real-time updates and rich document views in React and React Native with TypeScript.
- Make dense data usable through grid components such as AG Grid or MUI DataGrid, virtualisation and CSS Grid/Flexbox layouts that hold at scale.
- Implement streaming responses, citations, verification affordances and safe failure states.
- Make approvals, hand-offs, tool calls and partial progress visible in agent workflows, and let users interrupt or correct a run.
- Work on perceived performance so model calls taking seconds still feel responsive.
- Contribute to the component library and tenant theming, keeping branding, permissions and configuration clean.
- Integrate back-end APIs with authentication, role-based access, tenant context and useful client-side error handling.
- Maintain unit, integration and end-to-end tests with Jest, React Testing Library and Cypress or Playwright.
- Meet WCAG 2.1 accessibility standards.
- Profile and optimise code splitting, lazy loading, memorisation and bundles through Jenkins and SonarQube pipelines to AWS.
WHAT WE'RE LOOKING FOR
- 5+ years in front-end engineering with deep React and TypeScript experience.