Senior Frontend Engineer (Marketplace Web Rewrite) job in New York

Own major frontend initiatives end-to-end across highest-traffic surfaces (SRP, DLP)

Drive improvements in Core Web Vitals, SEO, conversion, and reliability

Lead technical design (RFCs, design docs) and align with Product & Design

Define scalable frontend architecture patterns (routing, data fetching, caching, components, analytics, error handling)

Raise the engineering quality bar via reviews, standards, and mentorship

Improve testing and observability (Playwright, Datadog, CI hygiene)

Partner with backend teams to design performant API contracts

Next.js 16.x (App Router)

React 19

TypeScript, 7+ years building production web applications

Deep React expertise

Strong experience with modern frontend architecture (SSR/SPA hybrids, especially Next.js patterns)

Proven experience leading high-traffic rewrites or migrations with measurable performance/SEO gains

Strong ownership mindset and ability to drive ambiguous projects to completion

High engineering standards (testing discipline, observability mindset, maintainability)

Bonus Skills

Next.js 16.x (App Router)

React 19

TypeScript

Tailwind, shadcn/ui

Playwright

Datadog

Backend exposure (Rails, Node.js, AWS)

Marketplace / two-sided platform experience (e.g., Airbnb-style platforms)

Ideal Background

We value engineering quality and judgment over narrow stack specialization.

Strong signals:

Experience in top-tier engineering organizations (Stripe, Airbnb, or similarly rigorous environments)

Strong CS fundamentals (ideally formal CS education)

High learning velocity and technical ownership mindset

Experience working on high-scale consumer web platforms