Projects where the constraints mattered.
- ok
- warn
- fail
- Case study 01/03Operational analytics
A silent data-corruption bug in a Laravel sync pipeline
Failed API calls were being saved as zero hours, silently overwriting correct reporting data. I made failure distinguishable from zero, bounded the sync window, repaired the corrupted records, and removed a scheduler deadlock.
Diagram of the fixed sync. A sync job makes an API call over a bounded sync window, and the result splits into two paths. Ok path: the hours from the API are written and the report is updated. Fail path: the result is null, kept distinct from zero, so the write is skipped and the existing data is kept. Nothing is overwritten. Warning, before the fix: a failed call was saved as 0 hours.
- Case study 02/03WordPress multisite platform
Phased WordPress updates across dozens of environments
A GitHub Actions pipeline that tests core and plugin updates once on template environments, then promotes the exact tested files through internal, staging and production, with mandatory backups and per-environment failure isolation.
Diagram of the phased update pipeline. Updates are tested once on two template environments, one multisite and one single-site. Status ok. The exact tested files are then promoted byte-for-byte to the internal environments, then staging, then production. In each environment a backup runs first, then the update. Divergent plugins branch off and are updated individually in each environment. Status fail: a failure halts only its own environment.
- Case study 03/03Deployment & infrastructure
Standardized WordPress migrations across a hosting fleet
A repeatable migration runbook (pull-based rsync, externalized credentials, verify before cutover) that removed the main sources of manual error from server moves.
Diagram of the migration runbook. Step 1: the source, the old server. Step 2: the destination initiates an rsync pull, with database credentials externalized to environment variables. Step 3: verify. Status ok. Step 4: DNS and SSL cutover. Step 5: registry update. Status gate: there is no cutover until verification passes.
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