Senior Frontend Platform Engineer – React/TypeScript Foundations

Jain Global LLC; Greater London; Hybrid; GBP 120,000 - 155,000; Full time

Job summary

Jain Global is seeking a Senior UI Platform Engineer in London to accelerate internal web app development by building reusable UI foundations and shared packages.

You will own frontend architecture, work with React/TypeScript, and collaborate across engineering to standardize scaffolding, authentication, and testing. This role focuses on developer experience and platform apps for onboarding and discovery in a fast-paced financial services environment.

Qualifications

• Strong React and TypeScript experience.
• Understanding of modern frontend architecture and app structure.
• Experience building reusable UI components or internal tooling.
• Experience with routing, state/data-fetching, and API integration in web apps.

Responsibilities

• Build reusable frontend foundations for internal web apps.
• Develop and maintain shared React/TypeScript packages and tooling.
• Create and improve starter templates and developer workflows.
• Define standards for app structure, testing, deployment, and supportability.
• Collaborate with other teams on authentication, observability, and frontend/backend patterns.
• Contribute to platform apps for onboarding, access admin, and service discovery.

Skills

React

TypeScript

Frontend architecture

Reusable UI

Developer tooling

Tools

Vite

Next.js

Ant Design

AG Grid

OpenTelemetry

Job description

Jain Global is seeking a Senior UI Platform Engineer in London to accelerate internal web app development by building reusable UI foundations and shared packages.

You will own frontend architecture, work with React/TypeScript, and collaborate across engineering to standardize scaffolding, authentication, and testing. This role focuses on developer experience and platform apps for onboarding and discovery in a fast-paced financial services environment.