Software Engineer - Rustification

Job Title: Software Engineer - Rustification

Location: Seattle, WA (Onsite)

Job Type: Full Time/Permanent

Experience: 6+ years

Job Description:

Must Have Technical/Functional Skills

• Rust Development
• Memory & Performance Optimization
• Java/JVM Internals
• Distributed Systems & AWS
• AI Agent-driven Development & Testing

Roles & Responsibilities

• Drive Java-to-Rust migrations as a DRAM-reduction lever: apply the decision framework to identify genuinely memory/latency-bound services (JVM overhead as a structural ceiling), rank APIs by traffic, and own each migration end-to-end from analysis through cutover.
• Bring deep system expertise to the agent-driven workflow: define type hierarchies, module boundaries, and API contracts; drive and unblock the Rustify agents rather than merely operating them; and contribute improvements back to the framework when you hit friction.
• Establish oracle-based correctness and prove functional equivalence : capture production request/response pairs as the source of truth and validate the Rust implementation via progressive zero-diff testing (Rustify Comparator) from small samples to full 1000+ scale, distinguishing real bugs from acceptable non-determinism.
• Implement on the target stack and optimize for memory: build on Smithy Rust Server SDK, ECS Fargate (ARM64/Graviton), Cargo Brazil, CDK with pipelines, and Cloud Auth; then profile hotspots, stress test, and quantify DRAM/latency savings with no functional regression.
• Execute safe rollout and operations: shadow deploy in Gamma and Prod to prove equivalence on live traffic, drive gradual cutover (canary to 100%) with rollback at each stage, stand up observability (dashboards, alarms, runbooks), and align API compatibility with upstream/downstream teams.
• Codify reusable learnings: migration guides, runbooks, and friction logs