Backend engineer with 5 years building payment and identity services on AWS. Took a checkout API from 400ms p99 to 90ms under 3x traffic growth, and led the migration of a 12-service monolith to event-driven workers. Comfortable owning a service end to end, from schema design through on-call.
Cut checkout API p99 latency from 400ms to 90ms by replacing synchronous fraud checks with a queued worker, absorbing 3x traffic growth with no added instances Migrated 12 services off a shared Postgres instance to per-service databases, eliminating the lock contention behind 60% of production incidents that quarter Built and shipped the idempotency layer for the payments API, reducing duplicate-charge support tickets from ~40/month to 2
Introduced contract tests between the mobile client and 6 backend services, catching 23 breaking changes before release over 8 months Mentored 3 junior engineers through their first on-call rotations; all 3 were shipping independently within a quarter