Griffin Hale Jack

• Own 2 client engagements end to end, covering scope, rates, architecture, build and delivery: a market-fit and reach-estimation web app for independent practitioners, and a lesson scheduling system for a drum studio.
• Enforce architecture as tests rather than convention: module boundaries, one-way dependencies, and an append-only decision record are checked by the suite, so a violation fails CI instead of accruing.

• Hired for a narrow repair lane, then moved onto newer, more complex systems with little oversight, across about 40 machine models in regular rotation and 20 more occasional. Diagnosed them and their embedded boards from service manuals, hardware probing, and firmware tracing, where the wrong call is a $500–$3,000 part.
• Loaded software and flashed firmware on locked-down boards across 15 part types, and recovered hardware the official path treats as dead, including a $5,000–$7,000 machine already written off, then wrote Python and Rust tools that turned expert-only, one-shot procedures into repeatable, checkable runs.
• Rebuilt the OS and test-bed application on 6 machine models, the only route to the granular diagnostics and logs a hard fault needs.
• Built the shop’s missing data and automation layer: nightly SQL ingestion across 30,000+ assets, browser tooling for inventory and order entry, and a Dockerized label service used daily by 12 people, then ran the rollout and support that got it adopted.

• Back-of-house across six employers, on crewed line, solo line, and solo line-and-counter, where reading an operation mid-shift is the skill that transfers.

• Built a 4-service C#/.NET system whose shape follows one constraint: the archive credential never leaves the private network. A public intake authenticates desktop clients on opaque scoped tokens and forwards over a service-token hop to a worker the internet cannot reach.
• Designed an EF Core ledger that makes imports idempotent and forward-only, so a crash mid-import resumes without duplicating records; all four services share one contracts assembly, and the tests POST its canonical fixtures verbatim.

• Shipped a full-stack media catalog live at catlg.app: a React/TanStack front end, a Fastify API whose OpenAPI contract is generated rather than hand-maintained, PostgreSQL, and a pg-boss worker.
• Built API-owned auth, using emailed verification codes and HTTP-only session cookies, behind unit, integration, contract and Playwright smoke tests, so sessions stay the API’s to reason about with no auth vendor in the loop.

• Reverse-engineered a no-API legacy inventory into a queryable store over 30,000+ assets, reconciled 2 internal ID systems that disagreed about which part was which, and fused in compatibility data from service manuals, suppliers, and firmware reverse-engineering, so “does this fit?” finally had an answer.

• Normalized 6 incompatible log formats into one queryable schema in Go and SQLite, so failure and token questions can be asked across tools never designed to be compared.

Coursework: computer science, networking, geography.