Senior Frontend Software Engineer

About The Role

We re hiring a Senior Frontend Engineer to be a technical anchor for our Marketplace web rewrite program. You ll lead the rebuild of our highest-traffic journeys and help set the frontend patterns and standards the team will reuse across the site for years.

This is a Senior role with Staff-leaning scope. We re intentionally building levels gradually, and we expect this hire to grow into Staff as they expand cross-team influence and ownership.

What You ll Do

• Own major initiatives end-to-end across our highest-traffic surfaces, starting with Search Results (SRP) and Details (DLP), with clear goals around Core Web Vitals, SEO, and conversion.
• Lead technical design for large changes (RFCs/design docs), drive alignment with Product/Design, and make pragmatic tradeoffs that stick.
• Define and implement reusable patterns in a Next.js App Router codebase (routing/data fetching, caching strategy, component architecture, error handling, analytics instrumentation).
• Raise the quality bar through standards, reviews, and mentorship, helping a junior-leaning team level up quickly.
• Improve developer velocity by shaping tooling and practices (testing strategy with Playwright, observability with Datadog, CI hygiene).
• Partner with backend engineers on API contracts to improve frontend performance and iteration speed.

Tech stack

• Frontend: Next.js (App Router), React, TypeScript, Tailwind, shadcn/ui
• Testing: Playwright
• Observability: Datadog
• Backend context: Ruby on Rails and Node.js on AWS, with Postgres and MongoDB

Your Experience

• We encourage candidates to apply even if they don t have 100% of the below qualifications. We believe in a holistic approach when evaluating talent for our team and post new roles often, so even if this role isn t quite right, we want to meet you!7 years building production web applications (or equivalent senior-level experience).
• Deep React expertise and strong command of modern frontend architecture, especially in Next.js-style SSR/SPA hybrids.
• Proven experience leading rewrites or major migrations of high-traffic surfaces with measurable results (Core Web Vitals, SEO, conversion, reliability).
• Strong technical judgment and ability to lead ambiguous projects from scoping through rollout and measurement.
• High engineering bar: strong testing discipline, observability mindset, and maintainable code.
• Ability to mentor and raise the bar for a team through clear communication and technical leadership.