Merkle Jobs in Virginia (NOW HIRING)

Job Summary:
Parry Labs is a company focused on redefining the edge of modern combat through digital engineering and software solutions. They are seeking a Senior Rust Systems Engineer to own and extend a multi-crate Rust workspace, ensuring production readiness and enforcing a no-panic policy across the system.
Responsibilities:
• Own and extend the multi-crate Rust workspace: consensus engine, coordination engine, transport layer, daemon orchestration, data ingestion, hardware abstraction layer, and 18+ supporting crates
• Maintain no_std compatibility across core crates for constrained embedded deployment targets
• Implement and harden production readiness gates: structured logging, rate limiting, replay protection, metrics collection, and durable state persistence
• Design and optimize the async runtime architecture (Tokio): task orchestration, graceful shutdown, backpressure handling, and cancellation safety
• Enforce the no-panic runtime policy across the entire workspace; systematically eliminate unwrap and expect from all production code paths
• Build and maintain CI pipelines, fuzz harnesses (cargo-fuzz), and property-based tests (proptest)
• Manage feature-flag complexity and compilation performance across the workspace
• Support multi-site deployments: cross-compilation, air-gapped packaging, and site-specific configuration
• Maintain safe API boundaries between cryptographic crates and the rest of the workspace
• Own the mesh member lifecycle state machine and guard all transitions against invalid progressions
• Other duties as assigned
Qualifications:
Required:
• 5+ years of professional Rust development in production systems
• Deep no_std and embedded Rust experience: heapless, fixed-capacity collections, custom allocators
• Strong async/Tokio expertise: task orchestration, graceful shutdown, backpressure, and cancellation safety
• Track record building multi-crate workspaces with clean dependency management and feature gating
• Experience with network protocol implementation: TCP/UDP framing, wire formats, gossip protocols
• Proficiency with the Rust testing ecosystem: cargo-fuzz, proptest, criterion, integration test harnesses
• Comfort with CI/CD for Rust projects: cross-compilation, clippy enforcement, MIRI for unsafe validation
Preferred:
• Experience with distributed systems, fault-tolerant consensus, or distributed fault tolerance research
• Prior work in defense, aerospace, or environments requiring deterministic execution guarantees
• Experience building hardware abstraction layers for embedded sensors or constrained receivers
• Contributions to the Rust ecosystem: open-source crates, RFCs, or conference talks
• Familiarity with structured binary cryptographic envelope formats
• Understanding of Merkle tree construction and public key commitment schemes
Company:
Parry Labs integrates digital systems, modernizes defense platforms, and accelerates military technology development. Founded in 2015, the company is headquartered in Alexandria, USA, with a team of 201-500 employees. The company is currently Growth Stage.