Software Engineer, Web Infrastructure

Notion•San Francisco, CA

1d•$150,000 - $168,000•Onsite

About The Position

Web Infrastructure builds the foundations behind Notion’s web clients so product engineers can ship fast, reliable, accessible experiences. As a junior engineer on the team, you’ll help make those experiences measurably faster and more resilient by investigating performance bottlenecks, improving how the client loads and responds, and helping build tools that catch regressions earlier. The role is based in San Francisco or New York City, with in-office work on Mondays, Tuesdays, and Thursdays (Anchor Days).

Requirements

Solid programming fundamentals and some experience building software with JavaScript or TypeScript.
Curiosity about how browsers work and how code affects page load, rendering, and interaction responsiveness.
A thoughtful debugging approach: ability to break down a problem, gather evidence, and ask for help when stuck.
Clear, kind communication and an interest in collaborating across teams.
Intellectual curiosity about AI-enabled engineering tools, using them thoughtfully and critically reviewing their output.

Nice To Haves

Familiarity with React or another component-based UI framework.
Experience with performance profiling, browser developer tools, React profiling, bundlers, code splitting, service workers, asset caching, or performance testing.

Responsibilities

Use browser tools and real-world data to investigate page-load and interaction bottlenecks, then turn findings into focused improvements.
Help build or improve performance tests, dashboards, and guardrails that make regressions easier to catch during development and rollout.
Ship scoped improvements to client loading, rendering, asset delivery, or caching, measure their impact, and check for regressions.
Partner with Web Infrastructure and product engineers to land changes safely across Notion’s web clients.
Document findings and share clear recommendations so teams can make better performance tradeoffs.