• Built a scalable backend system for seller-appeals on AWS (Lambda, Stepfunctions, DynamoDB) processing 25M listings/month, reducing resolution time from 3 days → 4 hours.
• Led migration of a legacy monolith service into distributed Java microservices, cutting batch runtime from 12 hours to 90 minutes and enabling 3× future scale.
• Developed monitoring & observability infrastructure (CloudWatch dashboards, alarms, runbooks) handling 1M API calls/day, removing 80 hours/month of manual ops work for PMs/SDMs.
• Built an LLM-powered ingestion parser using AWS Bedrock (Claude 3) to auto-backfill product attributes, reducing manual workload by 40% and eliminating $1M/year in vendor costs.
• Implemented a data engineering reporting and analytics system on 50M daily events (impressions, bids, pixels) reducing manual reporting by 80%.
• Integrated 4 major publishers via OpenRTB with Amazon Ad Exchange, projected to drive over ~$50M in annual ad revenue.
• Architected and launched a fee-based monetization platform for AdX and Payments, generating $6M/month ($72M/year).
• Drove engineering quality initiatives achieving 90% test coverage across 7 services, improving deployment confidence, and lowering incident MTTR by 60%.
• Mentored 2 SDE interns on AWS best practices, service architecture, and team pipelines, guiding them through onboarding and their first code contributions.