Technical Context & Problem Space
Direct the edge systems engineering team building the core Workers runtime, V8 isolate sandboxing, and WebAssembly execution layer across Cloudflare global points of presence.
Cloudflare Workers processes billions of daily requests by running V8 isolates directly on bare metal without traditional container overhead. Cold starts must remain invisible. The runtime marries C++, Rust, and Wasmtime abstractions to execute user code in sub-millisecond setup windows while enforcing rigorous memory sandboxing. Reliability across 300 cities is required. Fast paths bypass heap allocation entirely. Every microsecond saved on the hot path translates directly into lower hardware footprint.
Key Engineering Deliverables
- Scale V8 isolate density, eliminate tail latency in cold-start instantiation, and harden POSIX-compatible runtime primitives across thousands of bare-metal servers.
- Harden distributed state machines and I/O pipelines written in V8, Wasmtime, Tokio, WebAssembly against network partitions and disk faults.
- Build deterministic benchmarks and chaos tests that catch regressions before production rollout.
Candidate Profile & Compensation
- 3+ years writing performance-critical systems software in Rust (with production exposure to V8 and Wasmtime).
- Solid grasp of virtual memory, page caches, thread-per-core scheduling, or modern hardware interconnects.
- Annual base band: $220k - $303k USD (San Francisco, CA / In-Office), paired with equity and async-first remote workflows.
