Senior Frontend Engineer (React/TypeScript)

Build and maintain a multi-product portal serving multiple integrated products with unified navigation, dynamic feature toggling and shared workflows. You will develop complex interactive visualizations including an identity graph explorer, segment builder UI and real-time analytics dashboards, create and maintain a comprehensive design system of reusable, accessible and performant components, and implement advanced frontend performance optimizations. You will also build complex form systems with dynamic validation and multi-step workflows, and collaborate with Backend, Product and UX teams to translate complex requirements into intuitive, high-performance interfaces.

Requirements

• 5+ years of hands-on frontend development experience dedicated to React/TypeScript

• Proven production experience building visual editors, workflow builders or node-based UIs (React Flow, JointJS, Rete.js, Flume or custom implementations)

• Expertise in complex state management: Zustand, Jotai, Redux Toolkit or similar at scale with real-time sync

• Advanced TypeScript proficiency: generics, conditional types, mapped types, type guards, discriminated unions

• Strong understanding of React internals: fiber architecture, reconciliation, concurrent features, Suspense

• Production experience testing complex UI: Jest, React Testing Library, Playwright/Cypress for E2E

• Experience with advanced frontend performance optimization: virtualization for large lists and graphs, code splitting, lazy loading and rendering optimization

• Experience building and maintaining design systems with reusable, accessible and performant components

• Experience building complex form systems with dynamic validation, conditional logic and multi-step workflows