Frontend Engineer

Building a new foundation for cloud security

Act Security is building a new foundation for cloud security: ensuring applications have only the access they need, without adding operational overhead.

As AI accelerates the discovery and exploitation of vulnerabilities, detection and patching alone can’t keep up. We believe security should go beyond detecting attacks to reduce what attackers can do in the first place.

Founded by the team behind Medigate, which was acquired by Claroty, we’re a small team with ambitious goals. We stay close to our customers and trust the people closest to the work to make decisions and own the outcome.

Some of our hardest problems are still ahead. If you want to tackle fundamental challenges with people who care deeply about their work and each other, we’d love to build with you.

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 you’ll 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 you’ll bring

• 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

Working at Act

• Learn from real problems. We learn from our customers, each other, and our mistakes, and use what we learn to improve what we build.

• Build with AI. We use AI tools in our daily work, build intelligent automation into our product, and help customers secure their AI workloads.

• Set a high bar, together. We pursue ambitious goals and hold ourselves to high standards. We also believe great work happens when people enjoy working together.

• Share in what we build. We offer competitive compensation and meaningful equity, with the opportunity to help shape an early-stage company.