Software Engineer, Web Infrastructure

WHO WE ARE Notion is the collaborative AI workspace where teams and agents think together https://www.youtube.com/watch?v=vkpYpWfEK5s. 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. Millions of individuals, small teams, and large companies run their work on Notion. Notinos (our employees) are customer zero in bringing this future of work to life. We care about craft, building things that last, and the belief that great work is still fundamentally human. Our goal isn’t to ship the next feature. Each and every team of Notinos is working to set the standard for how humans work together in the AI era. From building a business’s system of record to making and managing AI agents to automating away the busy work, we care deeply about giving our customers more time for their life’s work. ABOUT THE WEB INFRASTRUCTURE TEAM: The Web Infrastructure team’s mission is to empower Notion engineers with web frameworks that are easy-to-use, performant, consistent and accessible. We own web foundations such as how client code is structured, how assets are served to users and how components are standardized and rendered to users. If we do our job well, Notion engineers should be able to build performant and beautiful product fast while Notion users enjoy a frictionless experience. This role can be based in either San Francisco or New York City. We work from our offices on Mondays, Tuesdays and Thursdays (our Anchor Days) because we do our best thinking and building together in person. We’re looking for someone who’s excited to work alongside the team during those days. ABOUT THE ROLE: You’ll be a core engineer on the Web Infrastructure team, focusing on improving Notion’s web client performance and/or development velocity. You will lead projects that reduce time to render a Notion page and time to interact with the page content across the app. You will also build tooling and frameworks that help product engineers build new products with a high quality experience. WHAT YOU'LL ACHIEVE: - Improve Users Page Loading experience through modularizing client codebase, lazy loading or caching relevant assets for the users. - Improve Interaction Latency through make the components and other part of codebase more lightweight and efficient. - Define best practices and build developer tooling so that web engineers can develop product features more easily with confidence. SKILLS YOU'LL NEED TO BRING: - You have around 8-10+ years of experience building and optimizing large web applications in React or similar frameworks. - Proven track record improving real‑user performance metrics at scale, from page load to post‑load interactivity. - Strength in modern bundling and build tooling such as Webpack and performance profiling. - Strong systems thinking and ability to design paved‑road abstractions, guardrails, and tooling for many teams. - Excellent collaboration and communication across platform and product teams, with a bias toward iterative, measurable impact. NICE TO HAVES: - Experience with modularizing large monorepos, reducing cyclic dependencies, and improving build times. - Familiarity with design systems and component performance, accessibility, and ergonomics. We hire talented and passionate people from a variety of backgrounds because we want our global employee base to represent the wide diversity of our customers. If you’re excited about a role but your past experience doesn’t align perfectly with every bullet point listed in the job description, we still encourage you to apply. If you’re a builder at heart, share our company values, and enthusiastic about making software toolmaking ubiquitous, we want to hear from you. 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’