Staff Frontend Engineer

NewtonX is a B2B insights company trusted by leading companies like Google, Microsoft, and Stripe. We are looking for a Staff Frontend Engineer with deep expertise in React and TypeScript to own the frontend architecture behind data-dense applications used by clients and research teams.

• 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

• 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
• Server-side rendering (Next.js, Remix) and hydration tradeoffs
• Frontend observability and performance budgets enforced in CI (Sentry, Datadog RUM)
• Data visualization at scale (D3, Recharts, Visx, canvas/WebGL)
• Real-time UI: WebSockets, polling strategies, streaming or collaborative interfaces
• Styling systems (Material-UI, Tailwind) and state management (Redux, Zustand)
• Build and monorepo tooling ownership (Vite, Webpack, CI pipelines)
• Cloud and infra exposure: GCP, Kubernetes, Docker, Terraform
• Internationalization, or SOLID design principles applied with judgment

• Competitive compensation with a total compensation range of $180k-$240k and equity.
• Excellent medical, dental, and vision insurance.
• 401k match with immediate vesting.
• Generous Paid time off: vacation, holidays, sick, and parental leave.
• A diverse, collaborative, and positive culture where we invest in and celebrate each other’s success.