Felix Marquez

• Led redesign of billing-event pipeline (Go + Kafka) serving 4M+ monthly active accounts; cut end-to-end processing lag from 12 min to under 90 seconds. • Owned Kubernetes service mesh rollout for 28 production services; reduced cross-service p99 latency by 35% and on-call pages by ~40% YoY. • Built internal feature-flag and config service used by 60+ engineers; eliminated weekly hotfixes caused by hard-coded environment toggles. • Mentored 4 mid-level engineers through design docs, load-test plans, and incident postmortems.

• Developed Python/Django and Go APIs for a retail analytics product processing 2B+ events/day with 99.95% monthly uptime. • Introduced Postgres partitioning and read replicas that cut dashboard query times from ~8s to under 400ms for top merchant reports. • Automated CI/CD with GitHub Actions and blue/green deploys; average release cycle dropped from biweekly to daily with zero weekend fire drills for 6 months. • Partnered with data science to ship real-time fraud scoring hooks used on 100% of checkout traffic.

• Built REST services and worker jobs for a logistics SaaS startup; shipped inventory sync that cut warehouse mismatch tickets by 50%. • Added structured logging and metrics (Prometheus) that shortened mean time to detect outages from hours to minutes. • Collaborated with product on API versioning so mobile clients could roll forward without breaking older app builds.

Relevant: Distributed Systems, Databases, Operating Systems; Dean’s List (final two years)