Applied AI Engineer + Infrastructure Engineer

Steel.dev | Applied AI Engineer + Infrastructure Engineer | Toronto, ON | ONSITE | $160k-$240k USD base + equity

Steel is open-source browser infrastructure for AI agents and apps. We make

it easy for developers to ship products that interact with the web - without

spending 80% of their time on browser pools, proxies, CAPTCHAs, and session

state. In 2025 we grew 50x: 6,000+ GitHub stars, dozens of paying customers,

millions of sessions served monthly. Dedicated chromium runs on Firecracker

VMs for sub-second cold starts.

Stack: TypeScript, React/Next.js, Node.js, AWS, Firecracker, Postgres, Redis.

4+ YOE for both roles.

• -- Applied AI Engineer ---

Shape how AI agents interact with the web. Build open-source frameworks/demos

on the Sessions API, run experiments on which models/prompts/harnesses

actually work, build evals against real scenarios, and work with customers

shipping agents to production. AI-native full-stack engineers with strong

product sense.

• -- Infrastructure Engineer ---

Design and operate the systems Steel runs on. Sample projects: VM

snapshotting that restores full browser state in under a second,

performance-tuning the Sessions API from kernel traces, orchestrating

millions of sessions with sub-second cold starts. Distributed-systems

experience, strong AWS/GCP and Linux/OS fundamentals. Rust is a plus.

Public referral bonus: $10,000 if your intro becomes a hire.

Apply: email careers@steel.dev with GitHub & resume, mention HN.