About Steel

Steel is building open-source browser infrastructure for AI agents and apps . We make it easy for developers to ship AI products that interact with the web using our Sessions API .

With over 7,000 GitHub stars, dozens of paying customers, and millions of sessions served monthly, 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, highly motivated, and talent-dense team that's shaping the future of how humans interact with the internet.

More on the problems we're solving:

Public referral bonus: Introduce us to a candidate who joins Steel, and we'll send you $10,000

The Role

We are looking for strong engineers with experience and interest in designing, building, and maintaining the high-performance systems that make up our platform.

Sample projects include...

- Building VM snapshotting that restores full browser state in under a second

- Staring at kernel traces to performance engineer our Sessions API





- Orchestrating millions of browser sessions across regions with sub-second cold starts

- Working with VMs, proxies, caches, task queues, and orchestration systems

- Shipping the observability and CI/CD stack from scratch

Requirements:

- 4+ years writing high-quality, production code

- Experience building and operating high-performance, large-scale distributed systems (battle scars welcome)

- Robust cloud infrastructure skills (AWS, GCP)

- Strong knowledge of OS foundations - Linux kernel, file systems, containers, etc

- Track record in performance optimization (we love a good "shaved 5ms" story)

- Able to work in-person from our Toronto office

- Rust experience is a plus, not a requirement

Applying

If there appears to be a fit, we'll reach to schedule 2-3 short technicals. After, we'll schedule an onsite in our office, where you'll work on a small project, discuss ideas, and meet the team.

📌 Member of Technical Staff - Infrastructure (Toronto)
🏢 Steel
📍 Toronto