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Act is an action-centric cloud security company focused on reducing cloud risk by removing excessive and unintended access across cloud environments. The company is early-stage, well-funded, and founded by repeat security operators who previously created Medigate (acquired by Claroty).
As Senior Frontend Engineer, you will own the user-facing experience of Act's cloud security platform. You'll design and build a fast, intuitive, and data-dense product that enables security teams to understand and act on complex cloud access data at a glance.
Key responsibilities include:
- 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
- Improve codebase, tooling, and engineering practices as the company grows
The culture emphasizes three values: Win (setting ambitious goals and holding high standards), Learn (constantly from customers, each other, and mistakes), and Have Fun (believing great work happens when people enjoy working together).
REQUIREMENTS:
- 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
