Keith J. Hetrick

Bellweather Studios · Remote

• Architected a cross-surface audio platform over 32 shared C++ modules feeding 10 apps. Native C++20 plugins across VST3, AU, AAX, CLAP, and Standalone, plus an Electron desktop app and AWS revenue infrastructure.
• Built a format-aware release-validation orchestrator spanning pluginval, auval, clap-validator, and AAX validation, backed by 239 plugin test files.
• Built lock-free real-time audio paths with zero heap allocation. Each engine clears a 48 kHz / 512-sample block in 30-66 microseconds, under 1% of the real-time budget, with sanitizer-backed validation lanes.
• Established mutation testing after a DC-offset defect survived the existing coverage suite, converting the failure into a permanent detection gate.
• Decoupled payment, email, and authentication providers behind validated adapters. 160 pre-push gates enforce type strictness, secret hygiene, architecture drift, and reproducibility.

Confidential consumer-services agency · Remote

• Architected and shipped a governed operational record over a Prisma-canonical Postgres system of record, with typed models, shared vocabulary, and commit-time drift detection.
• Modeled authority as data with ownership-scoped RBAC, legality-checked state transitions, append-only audit, bounded break-glass access, and proven cross-tenant isolation.
• Projected the same credential-less in-process system through REST, CLI, and protocol adapters. Internal fields are structurally unrepresentable in public projections, with byte-parity checks across transports.
• Extended the governed record into a multi-tenant public-site renderer where publishing is a validated data transition rather than a deployment.

West End Designs · Remote

Shipped internal authentication and content-production platforms across Next.js, React, MongoDB, AWS, and Stripe, owning each from data model to deployment.