Senior Software Engineer — Mercator Payments
Seattle, WA · Mar 2023 — Present
- Architected the migration of a 14-year-old Python monolith to 11 event-driven Go microservices, reducing p99 API latency from 480ms to 178ms (-63%) and on-call pages by 41% over six months.
- Designed an idempotent payout pipeline processing $2.1B/year across four payment processors; engineered exactly-once delivery via Kafka + Postgres outbox, eliminating ~$180K/year of historical double-payment incidents.
- Led the platform's adoption of OpenTelemetry; instrumented 40+ services, defined three SLOs adopted org-wide, and cut mean time to recovery from 24 to 6 minutes.
- Mentored 4 mid-level engineers through promotion; designed the team's onboarding rotation that brought time-to-first-PR from 14 days to 4.