Senior Frontend Developer — React

We are looking for a Senior Frontend Developer with 5+ years of experience and strong expertise in React and frontend architecture. In this role you will build a new product from the ground up — owning the architecture, tooling, and foundational engineering decisions with no legacy codebase to lean on. Responsibilities: - Build a production application from scratch: set up the project, tooling, CI/CD hygiene, and foundational architecture decisions from day one - Define frontend architecture including component structure, state management, data flow, routing, and API integration - Design and build a reusable component library / design system - Own authentication and authorization flows, including login, session/token handling, and role-based access control - Ensure application security: input validation, XSS/CSRF protection, secure token storage Qualifications: - 5+ years of frontend engineering experience solving deep, non-trivial UI, performance, and architecture problems - Proven experience building applications from scratch and making foundational architecture decisions independently - Strong expertise in React, JavaScript, and TypeScript - Strong experience with Redux/Redux Toolkit or equivalent state-management solutions