Rust Engineer

We're building the runtime layer that powers production AI agents inside CosX customers - from lending platforms to retail intelligence. Rust is our weapon of choice for the parts that need to be fast, correct, and survive real production load.

You'll own services end-to-end: design, ship, monitor, and tune. The work spans inference orchestration, high-throughput data pipelines, and the integration surface between agents, internal tools, and customer systems.

• Design, build, and operate Rust services that sit on customer-critical paths
• Profile, benchmark, and tune for latency, throughput, and memory under real load
• Own observability - traces, metrics, and SLOs - for the systems you ship
• Collaborate with AI engineers to harden inference and agent orchestration
• Code-review across the platform and raise the bar on systems engineering

• 2-4 years writing production Rust (or strong systems experience with deep Rust comfort)
• Solid grasp of async runtimes (Tokio), error handling, and lifetimes in real codebases
• Comfortable with profiling tools, perf debugging, and reading flamegraphs
• Experience operating services in production - not just shipping them
• Clear written communication; able to scope and own a project from spec to launch

• Exposure to ML inference, vector databases, or agent runtimes
• Experience with WASM, embedded, or low-level networking
• Open-source contributions or published technical writing