Senior Frontend Engineer (React/TypeScript) – SaaS Platform

About the role

We are seeking a Senior Frontend Engineer to join the Platform Services team of a leading SaaS provider. The role focuses on building and evolving a shared frontend platform that powers multiple React applications across the company.

Key responsibilities

• Design and implement scalable frontend architecture used by several products.
• Develop reusable platform capabilities such as authentication, networking, routing, state management and error handling.
• Improve performance through profiling, code‑splitting, lazy loading, bundle optimization and rendering optimizations.
• Build resilient systems for authentication flows, session management, token refresh, offline behavior and request cancellation.
• Create maintainable API communication layers, request interceptors, caching strategies and error‑handling patterns.
• Enhance observability with logging, monitoring, Real User Monitoring (RUM) and production diagnostics.
• Define and drive testing strategies covering unit, integration and end‑to‑end tests.

Required profile

• Proven experience designing frontend platforms at scale.
• Strong understanding of React ecosystem and TypeScript.
• Ability to make technical trade‑offs and explain decisions based on production experience.
• Passion for solving cross‑application challenges and improving developer experience.

Required skills

• React
• TypeScript
• JavaScript, HTML, CSS
• State management (e.g., Redux, Context API)
• Authentication and session management
• Performance profiling and optimization
• API communication, request interceptors, caching
• Logging, monitoring, Real User Monitoring (RUM)
• Unit, integration and end‑to‑end testing