Staff Frontend Engineer

About NewtonX NewtonX is a B2B insights company trusted by the world's most innovative companies to make high-stakes decisions with confidence. We combine a verified network of business professionals with AI-powered research tools to deliver research intelligence faster, more precise, and more defensible than traditional methods. Our clients include Google, Microsoft, TikTok, DoorDash, Stripe, and Coinbase. Our research has been cited by Fortune, Forbes, TechCrunch, Adweek, and the Wall Street Journal. NewtonX has raised $47M from investors including Two Sigma Ventures, Third Prime, XFund, and Citi Ventures. About The Role 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. What We’re Looking For 6+ years engineering experience, mostly frontend, including 3+ at a senior level owning projects end-to-endDeep React expertise — hooks, composition patterns, and the ability to reason about rendering behavior rather than guess at itStrong TypeScript — typing that catches real bugs instead of decorating the codeExpert JavaScript (ES6+), HTML, and CSS/SCSS, including the modern layout modelProven ownership of frontend architecture at scale: module boundaries, shared component libraries, and state management strategyWeb performance as a discipline — Core Web Vitals, bundle analysis, code splitting, virtualization, and profiling with real toolingAccessibility fluency — WCAG 2.1 AA, semantic HTML, keyboard and focus management, screen reader testingDesign system experience: reusable, themeable, documented components built in partnership with DesignTesting depth — Jest and React Testing Library, plus end-to-end coverage (Playwright or Cypress) people actually trustFluency consuming APIs: REST and/or GraphQL, data-fetching and caching patterns (React Query, SWR, Apollo), and error states that hold up in productionWorking knowledge of Python/Django — enough to read backend code, shape endpoints with backend engineers, and ship a small change yourselfAbility to mentor, review code with judgment, and raise the bar without becoming a bottleneck Bonus Skills (Nice-to-Haves) Server-side rendering (Next.js, Remix) and hydration tradeoffsFrontend 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 interfacesStyling 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, TerraformInternationalization, or SOLID design principles applied with judgment What You’ll Do Own the architecture of our React/TypeScript applications and the patterns the team builds onLead development of performant, accessible UIs for complex research and analytics workflowsSet and defend frontend standards — performance budgets, accessibility, testing, and quality gates in CIBuild and evolve our shared component library and design system with DesignDrive measurable performance work: profile, fix the real bottleneck, instrument it so it stays fixedPartner with backend engineers on API contracts that make the frontend simpler, not harderPay down frontend technical debt deliberately, and contribute to Python/Django services where it speeds deliveryMentor engineers and own department-wide technical initiatives from proposal through adoption What We Offer Competitive compensation with a total compensation range of $180k-$240k and equity. (Please note that salary and compensation may vary based on skills, experience, performance, and location.)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.