Staff Frontend Engineer
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Before you apply
Salary$180k – $240k
LocationRemote
Work moderemote
Typefull-time
SeniorityLead
Experience6+ yrs
DepartmentEngineering
EquityIncluded
Company size51–200 people
PostedSep 9, 2026 · 1mo ago
Verified live8h ago
At a glanceSummarised by Seekless from the posting.
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
Strong TypeScript — typing that catches real bugs
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
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)
Fluency consuming APIs: REST and/or GraphQL, data-fetching and caching patterns (React Query, SWR, Apollo)
Working knowledge of Python/Django — enough to read backend code, shape endpoints, and ship a small change
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
Skills
React
TypeScript
JavaScript
HTML
CSS
SCSS
Jest
React Testing Library
Playwright
Cypress
REST
GraphQL
React Query
SWR
Apollo
Python
Django
Next.js
Remix
Sentry
Datadog RUM
D3
Recharts
Visx
WebGL
WebSockets
Material-UI
Tailwind
Redux
Zustand
Vite
Webpack
GCP
Kubernetes
Docker
Terraform
Benefits
Health insurance
Dental insurance
Vision insurance
401(k)
Paid time off
Parental leave
About the company
NewtonX (600+ clients like TikTok, Microsoft, Salesforce, Bain, Figma and many more) is a research intelligence company helping organizations make better business decisions and train better AI models through verified human intelligence.
We turn specialized human expertise into reliable business decisions (e.g., product launches, marketing strategy, brand reputation tracking, M&A due diligence) and AI training data (frontier model improvements and evals).
We have several million domain experts that we have sourced over the last few years (150+ industries including finance, legal, coding, tax & accounting, healthcare, semiconductors, cybersecurity, STEM and more).
We have worked with AI Labs and Enterprises on topics ranging from sourcing senior electrical and SW engineers for a chip design benchmark to pediatricians and psychiatrists for clinical data to ML engineers and PhD-level statisticians proficient in 3D modeling.
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.
Legal
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.