Rebuilt the mobile release and CI/CD process, automating builds and publishing to TestFlight and Google Play.

Upgraded React Native, Expo, and 20+ third-party dependencies to support current iOS and Android SDKs.

Reduced weekly support volume by 90%, from 30+ issues to near-zero through focused stabilization efforts.

Drove ~$100k in annual savings by eliminating Stripe’s 0.4% fee and enabling processing-fee pass-through.

Safely migrated customers to the new payments system through feature-flagged rollout and reconciliation.

Owned on-call escalation for high-severity payments issues, delivering durable fixes across Stripe workflows.

Developed Node.js REST and GraphQL APIs with Express, TypeScript, PostgreSQL, and Redis, and scaled them on AWS using EC2, Auto Scaling, and ELB to handle traffic spikes at the start of events.

Provided on-site engineering support for major productions (e.g., Nike, Levis), resolving real-time issues and shipping fixes under live-event constraints.