I worked on a messy integration where data moved across multiple systems and failures were silently cascading—broken retries, duplicated records, and zero visibility into where things went wrong. I mapped the full flow end-to-end, added idempotency and clear boundaries between systems, and replaced brittle chained logic with a more explicit, observable integration. That cut down failures immediately and made the setup easy to extend when new tools were added. This kind of work—owning real systems and untangling messy automations—is exactly what I enjoy.