Staff Frontend Engineer

NewtonX; United States; On-site; USD 180,000 - 240,000; Full time

Benefits offered by this job

Competitive compensation

Excellent medical, dental, and vision

401k match with immediate vesting

Generous paid time off

Collaborative culture

Job summary

NewtonX is seeking a Staff Frontend Engineer with deep React and TypeScript expertise. You will own the frontend architecture behind data-dense applications used by clients and research teams, focusing on performance, accessibility, and interaction quality.

This is a hands-on role with impact through systems and standards you establish. The ideal candidate has 6+ years in engineering, strong React/TypeScript skills, and a track record of frontend architecture ownership, UI performance, and

Qualifications

• 6+ years engineering experience, frontend-focused, including 3+ years leading end-to-end projects.
• Expert React with hooks, composition patterns, and rendering mindset.
• Strong TypeScript typing that catches real bugs.
• Proficient HTML, CSS/SCSS, and modern layout techniques.
• Experience owning frontend architecture, shared libraries, and state management.
• Performance focus: Core Web Vitals, bundling, code-splitting.
• Accessibility expertise: WCAG 2.1 AA, keyboard/ARIA.
• Design system collaboration with Design.
• Testing depth: Jest, RTL, Playwright or Cypress.
• REST/GraphQL data fetching, caching (React Query, SWR, Apollo).
• Reading Python/Django backend code and collaborating with backend engineers.
• Ability to mentor and raise the bar.

Responsibilities

• Own the architecture of React/TypeScript apps.
• Lead development of performant, accessible UIs for analytics workflows.
• Set and defend frontend standards in CI.
• Develop and evolve shared component library and design system with Design.
• Drive measurable performance improvements and profiling.
• Collaborate with backend engineers on API contracts.
• Reduce frontend tech debt and contribute to Python/Django services.
• Mentor engineers and lead department-wide technical initiatives.

Skills

React

TypeScript

JavaScript (ES6+)

HTML

CSS/SCSS

Frontend architecture

Web performance

Accessibility (WCAG 2.1 AA)

Design system

Testing (Jest, RTL)

Playwright/Cypress

REST/GraphQL APIs

Python/Django basics

Mentoring

Tools

Jest

React Testing Library

Playwright

Cypress

Sentry

Datadog RUM

D3

Recharts

Visx

Redux

Tailwind

Vite

Job description

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.

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.