newtonx - Staff Frontend Engineer
Requirements
• 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
Responsibilities
• 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
Benefits
• 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. • NewtonX is proud to be an equal opportunity workplace. We do not discriminate based upon race, religion, color, national origin, sex, sexual orientation, gender identity/expression, age, status as a protected veteran, status as an individual with a disability, or any other applicable legally protected characteristics.
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