Frontend Engineer

About Us Act Security is an action-first cloud security platform built for the AI era. For years, organizations have piled up access they never use. That debt was survivable when attacks moved at human speed. It isn't anymore. AI now finds and exploits access paths faster than any team can triage them, and AI agents are operating inside production systems with real autonomy to act. Access has become the attack surface, and chasing findings one at a time is a losing game. Act systematically shrinks the access surface across your cloud, enforcing deterministic boundaries on what people, workloads, and AI agents can reach. We reason across identity, network, and AI access together - the three control planes that decide what anything can touch - and we enforce through the cloud-native controls you already own. No agents, nothing new to deploy, nothing taken offline. The result is a cloud that's structurally harder to attack and a security posture that holds between audits instead of quietly eroding. We're early-stage, well-funded, and moving fast - built by repeat security operators who previously created Medigate (acquired by Claroty). If you want to build something that matters from the ground up and ship to production within days, this is the place. Our Culture We live by three values: Win, Learn, Have Fun. We play to win - we set ambitious goals and hold ourselves to high standards. We learn constantly - from customers, from each other, and from our mistakes. And we have fun doing it: we believe great work happens when people enjoy working together. The Role We are looking for a Frontend Engineer to join our team and own the user-facing experience of our cloud security platform. You'll build a fast, intuitive, and data-dense product that lets security teams understand and act on complex cloud access data at a glance. What Will You Do Design and build a modern, responsive web application using React and TypeScript Translate complex security and cloud data into clear, actionable, and intuitive UI/UX Build reusable component libraries and design systems that scale across the product Work closely with Product and Design to turn concepts into polished, production-ready features Optimize application performance, especially around large, data-heavy views (graphs, tables, dashboards) Collaborate with backend engineers to define clean, efficient APIs Leverage AI tools as part of your daily workflow - we build with AI, not just for AI Improve our codebase, tooling, and engineering practices as we grow What We're Looking For At least 5 years of hands-on frontend development experience Strong proficiency in React and TypeScript, with deep understanding of modern frontend architecture Experience building complex, data-heavy UIs (dashboards, visualizations, tables at scale) Strong sense of UI/UX and attention to detail Familiarity with state management, testing, and performance optimization in large frontend codebases Experience working closely with backend and design teams Strong sense of ownership, clear communication, and ability to move fast without cutting corners Why Join Us Real ownership - this is an early-stage company where engineers drive decisions AI-native environment - you'll join an AI-native team. We help customers secure their AI workloads, build intelligent automation into our product, and use AI tools every day as part of how we build and ship. Top-tier team - founders with deep security and product experience, surrounded by a team of experts and backed by leading investors Competitive package - strong salary, meaningful equity, and the upside of joining early