Communication

Root-caused a customer-blocking production incident to an undocumented architecture assumption, rebuilt the affected consumer with a post-mortem, an ADR, and business-rules documentation, then, after rollout exposed a database deadlock, diagnosed it to a Kafka partitioning mismatch and replaced silent message loss with retry, a dead-letter queue, and per-user serialization.

A per-request warehouse join was scanning 658.8 MB against a hard 953.7 MiB per-job ceiling, on a table growing with every new customer. I measured it, moved the join into the pipeline that already ran it, deleted the cache that was hiding the problem, then audited my own migration and found 79% of production rows never backfilled, plus 9,299 alerts that had never appeared in the product at all.

Two services independently calculated the same customer-facing metric, causing inconsistent data. I redesigned the architecture so only one service owned the calculation while every other service simply signaled stale data.

Turned a non-deterministic end-to-end suite (25 to 37 failures varying per run) into 302 passing with zero failures (8 pre-existing skips left untouched, and the consumer running), without adding a skip or weakening an assertion, and, in review, empirically proved that three of four proposed production changes were unnecessary.

Made an edit to an organizational node in the asset hierarchy propagate consistently across denormalized copies in seven tables and two services, via a single atomic transaction with post-commit events, the work that made me the team's reference for cross-service synchronization.

A new platform-wide asset state was specified as a rule that eight different read paths had to learn. I proposed applying it once at the write boundary instead, removing the asset from route scope and restoring it on reactivation, which made most of the original scope unnecessary and left the counters, reports, app sync and adherence untouched.

Identified the absence of frontend standards, proposed a Design System, built it from scratch and taught the team how to adopt it.

In code review, caught a null-safety bug that would have crashed three production components, and fixed the defect class rather than the three instances, by proposing a shared data-layer helper to the PR's author instead of patching each render site myself; one of 310 pull requests I gave an explicit review verdict on that half (702 across four repositories between 2025-03 and 2026-08), measured from the Bitbucket API rather than recalled.