Staff Frontend Engineer, NewtonX

• 6+ years engineering experience, mostly frontend, including 3+ at a senior level owning projects end-to-end
• Deep React expertise — hooks, composition patterns, and the ability to reason about rendering behavior rather than guess at it
• Strong TypeScript — typing that catches real bugs instead of decorating the code
• Expert JavaScript (ES6+), HTML, and CSS/SCSS, including the modern layout model
• Proven ownership of frontend architecture at scale: module boundaries, shared component libraries, and state management strategy
• Web performance as a discipline — Core Web Vitals, bundle analysis, code splitting, virtualization, and profiling with real tooling
• Accessibility fluency — WCAG 2.1 AA, semantic HTML, keyboard and focus management, screen reader testing
• Design system experience: reusable, themeable, documented components built in partnership with Design
• Testing depth — Jest and React Testing Library, plus end-to-end coverage (Playwright or Cypress) people actually trust
• Fluency consuming APIs: REST and/or GraphQL, data-fetching and caching patterns (React Query, SWR, Apollo), and error states that hold up in production
• Working knowledge of Python/Django — enough to read backend code, shape endpoints with backend engineers, and ship a small change yourself
• Ability to mentor, review code with judgment, and raise the bar without becoming a bottleneck

Desirable

• We are looking for a Staff Frontend Engineer with deep expertise in React and TypeScript
• You’ll own the frontend architecture behind the data-dense applications our clients and research teams use every day, where performance, accessibility, and interaction quality are the product
• This is a hands-on role: you’ll write production code, but your leverage comes from the systems and standards you leave behind
• Own the architecture of our React/TypeScript applications and the patterns the team builds on
• Lead development of performant, accessible UIs for complex research and analytics workflows
• Set and defend frontend standards — performance budgets, accessibility, testing, and quality gates in CI
• Build and evolve our shared component library and design system with Design
• Drive measurable performance work: profile, fix the real bottleneck, instrument it so it stays fixed
• Partner with backend engineers on API contracts that make the frontend simpler, not harder
• Pay down frontend technical debt deliberately, and contribute to Python/Django services where it speeds delivery
• Mentor engineers and own department-wide technical initiatives from proposal through adoption