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-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
Bonus Skills (Nice-to-Haves)
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
What You’ll Do
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
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.