Notion
Senior
Cut Notion's page-load and interaction latency as a core Web Infrastructure engineer
Interview for Notion's Web Infrastructure team, owning web client performance and developer tooling used by all Notion product engineers. Expect deep React/bundling performance system-design questions and discussion of real-user metrics, aimed at candidates with 8-10+ years building and optimizing large web applications.
Step into this interview
Free · a live voice mock calibrated to this exact role
What this interview tests
- React/large web app performance optimization
- Bundling and build tooling (e.g., Webpack) and profiling
- Systems thinking: paved-road abstractions and developer tooling
- Real-user performance metrics (page load, interaction latency)
- Monorepo and codebase modularization
Common question themes
Design a plan to reduce time-to-render on a large, complex web page
How would you reduce interaction latency across many components
Walk through a real-user performance metric you improved and how you measured it
How do you build developer tooling that many teams will actually adopt
Experience modularizing a large monorepo or reducing cyclic dependencies
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