Software Engineer, Web Infrastructure

Notion · San Francisco, California · $150,000 - $168,000 per year · hybrid Notion is the collaborative AI workspace where teams and agents think together. We're building one place where your knowledge, projects, meetings, and AI tools live side by side, so work is faster, clearer, and less fragmented. The Web Infrastructure team 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. You'll investigate performance bottlenecks, improve how the client loads and responds, and help build tools that catch regressions earlier. 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, measuring their impact and checking for regressions. Partner with Web Infrastructure and product engineers to land changes safely across Notion's web clients. Document what you learn and share clear recommendations so teams can make better performance tradeoffs. Requirements: Solid programming fundamentals and some experience building software with JavaScript or TypeScript; familiarity with React or another component-based UI framework is helpful. Curiosity about how browsers work and how code affects page load, rendering, and interaction responsiveness. A thoughtful debugging approach: you can break a problem down, gather evidence, and ask for help when you're stuck. Clear, kind communication and an interest in collaborating across teams. Intellectual curiosity about AI-enabled engineering tools; you use them thoughtfully and review their output critically. Benefits: Notion is committed to providing highly competitive cash compensation, equity, and benefits. The compensation offered for this role will be based on multiple factors such as location, the role's scope and complexity, and the candidate's experience and expertise.