Requisition ID: 105614-1
Title: Senior Java/Rust Performance Engineer
Duration: 6-12 months with possible extension
Location: Seattle, Washington, 98109
Salary Range: $55- $60 an hour on W2/C2C
Job Description:
Competencies: 6+ years experience required
Digital : Amazon Web Service(AWS) Cloud Computing
Advanced Java Concepts
Client SQL Server 2019
Java Performance Tools (Jprobe, Jensor, OptimizeIT)
" 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 (RustifyComparator) 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), CargoBrazil, CDK with @amzn/pipelines, and CloudAuth; 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
Comments for Suppliers: Must Have Technical/Functional Skills
" Rust Development
" Memory & Performance Optimization
" Java/JVM Internals
" Distributed Systems & AWS
" AI Agent-driven Development & Testing
Appreciate your quick response and please feel free to reach me out for any query you may have.
Thanks