Staff Software Engineer

Greylock has a long history of backing category-defining enterprise security companies, such as Wiz, Palo Alto Networks, and Rubrik. We recently invested in a next-generation cybersecurity company building AI agents that autonomously execute core security workflows at machine speed. The founding team previously scaled a multi-billion-dollar security startup and knows exactly what great looks like. Since coming out of stealth, the company has experienced rapid growth, partnering with Fortune 500 companies to secure some of the most complex production environments in the world. They're hiring their foundational frontend engineer not to push pixels, but to build the entire frontend platform from scratch. You'll own the architecture, the frameworks, the design system, and the developer experience that every engineer after you builds on top of. If you want to be the person who defines how a generational security company gets built from the ground up, this is that role. What You'll Do Own the entire frontend platform from the ground up. Define the architecture, frameworks, and tooling that every engineer after you builds on. Build the core design system, reusable component libraries, state management layer, and APIs that set the standard for how the team ships product. Work directly with design and product to turn complex security workflows into simple interfaces — prioritizing speed and flexibility over polish in the early stages. Design and deliver high-impact features that seamlessly integrate AI-powered capabilities, ensuring clarity, usability, and reliability for customers navigating massive amounts of security data. Establish the testing, performance, and maintainability practices that keep the codebase production-ready as the team scales. As the first frontend hire, you'll set the bar for technical excellence and mentor future engineers into the culture you helped create. What We're Looking For You've done this before — ideally at an early-stage company or a new product line where you had to build the foundation, not just build on one. You've operated at the Staff+ level (Staff, Senior Staff, or Principal) at some point in your career. You have deep expertise in React, TypeScript, and modern build tooling and web application architecture. You think in systems, not just features — you get energy from building the abstractions and infrastructure that make other engineers faster. You have a strong background in frontend infrastructure: component libraries, build systems, state management, and performance optimization. You're pragmatic: you know when to architect for scale and when to ship something that works today. You move with urgency because you understand that at this stage, velocity is a competitive advantage. And you care deeply about engineering craftsmanship code quality, attention to detail, and thoughtful design aren't afterthoughts for you. Location: Open to remote, with offices in San Francisco and New York. Stage: Series A About Greylock: Greylock is an early-stage investor in hundreds of remarkable companies, including Airbnb, LinkedIn, Dropbox, Workday, Figma, Facebook, Instagram, Roblox, Coinbase, and Palo Alto Networks. More can be found about us here: https://greylock.com/