Infrastructure Engineer

Steel is building open-source browser infrastructure for AI agents & apps. We make it easy for AI engineers to ship products that interact with the web using our Sessions API - An API that controls fleets of browser sessions in the cloud while we handle everything from scaling to antibot and more.

Our tech stack:

• Frontend: Vanilla React + TailwindCSS + Shadcn, built with Vite, deployed on Vercel
• Backend: Fastify, Node.js, Zod, NATs, Drizzle with Redis, PostgreSQL, and S3
• Infrastructure: Pulumi, Go, Firecracker VMs, Docker
• Languages: Mostly Typescript, Rust, Go

With over 6,000 GitHub stars, dozens of paying customers, and millions of sessions served, we grew our platform 50x in 2025 purely through word-of-mouth and our open-source community. Backed by world-class investors, we're building a small, talent-dense team that's shaping the future of how humans & agents interact with the internet.