Senior Frontend Engineer

5+ years of experience building user-facing web applications, including senior-level ownership of complex, high-impact projects. Fluent in React and TypeScript, and have helped shape or modernize a frontend stack. Practical experience with GraphQL (schemas, queries, mutations, performance considerations) and at least one GraphQL client. Worked on performance-sensitive or data-heavy products (dashboards, observability, dev tools, ML platforms, real-time UIs). Use metrics and traces to guide performance work. Care about UX quality such as loading states, error states, keyboard shortcuts, micro-interaction, and express that care through clean abstractions and solid architecture.

Spend most of your time building rich, performant frontend experiences in React + TypeScript (dashboards, traces, configuration flows, real-time views). Collaborate with backend engineers on requirements, define API contracts, implement UI, and ship with metrics, logs, and alerts wired up. Design and implement patterns built for scale that work under real data and load. Lead frontend architecture decisions around routing, data fetching, caching, and client-side error handling. Use analytics tools, browser performance profilers, and Core Web Vitals to measure, debug, and continuously improve frontend performance. Build and iterate on visualizations for model performance, agent behavior, and real-time signals by paying attention to rendering performance and perceived latency. Drive UI resilience: robust loading states, optimistic updates where appropriate, pagination / virtualization, retry logic, and graceful degradation. Provide technical leadership: reviewing designs and PRs, mentoring engineers on frontend patterns and performance, and raising the bar on UX quality in code.