Sr. Frontend Engineer (ReactJS + GraphQL)

The MissionWe are looking for a Senior Frontend Engineer who doesn’t just build web pages, but masters the browser. This is not a role for a generalist who occasionally dips into React or relies heavily on pre-made component packages. We are looking for someone who has spent years deeply immersed in raw JavaScript and the modern React ecosystem—someone who intimately understands rendering lifecycles, state synchronization, browser performance, and pixel-perfect UX execution. You will play a critical role in architecting our core platform. We build our UI from the ground up to ensure absolute performance and customizability, which means you will care deeply about writing clean, unbloated code, optimizing complex data layers, and bringing interfaces to life with fluid animations. We value technical sovereignty, craftsmanship, and raw execution over corporate bureaucracy. If you want to own your architecture, solve genuinely difficult rendering challenges, and ship code at lightspeed, we want to talk to you. Key Responsibilities• Core Frontend Architecture: Architect, scale, and maintain our high-performance React and TypeScript applications from the ground up, avoiding unnecessary third-party package dependencies. • Performance & Rendering Optimization: Proactively identify and destroy rendering bottlenecks, memory leaks, and layout thrashing. Optimize for code-splitting, lazy loading, and sub-millisecond interaction states. • Data Layer Management: Build and optimize highly efficient frontend data flows and caching strategies utilizing React Query and GraphQL. • Custom Component Engineering: Design and maintain our proprietary, highly reusable component library from scratch. Fully document and stress-test components inside Storybook. • High-Fidelity Interaction & Animation: Work closely with product design to implement fluid micro-interactions and complex web animations that elevate the user experience. • Technical Leadership & Code Quality: Set the standard for frontend engineering excellence through rigorous code reviews, architectural documentation, and mentorship of junior/mid-level engineers.