Senior Software Engineer - Amazon
(2020-06)
Amazon Pharmacy core engineering · 4M+ active patients · 4-engineer team · 3 downstream service owners
- Built an agentic LLM adherence assistant with LangGraph, MCP, and AWS Bedrock; cut missed refills 25% and achieved 92% clinical appropriateness.
- Reduced LLM token cost 40% via prompt optimization and response caching; patterns adopted across 3 Amazon Pharmacy teams.
- Established LLM eval pipelines with LangSmith and RAGAS and prompt safety guardrails; standardized AI governance patterns now used across 3 Pharmacy teams.
- Engineered the RxPass subscription backend with Spring Boot, FastAPI, and Kafka; REST and GraphQL APIs handle 10M+ daily transactions at p99 under 50ms.
- Shipped React and Next.js UIs for prescription management and patient enrollment, serving millions of pharmacy customers via GraphQL and Redux.
- Architected a Kafka and KSQLDB pipeline ingesting 2B events daily across Amazon Pharmacy's population health data lake; cut analytics latency to under 5 minutes.
- Optimized PostgreSQL, DynamoDB, and Redis with composite indexing, PgBouncer pooling, and pgvector caching; dropped p99 from 200ms to 50ms under peak load.
- Scaled pharmacy infra on AWS EKS with predictive autoscaling; sustained 99.9% uptime under 5x peak load for millions of concurrent patients.
- Deployed GitOps CI/CD with GitHub Actions and ArgoCD; cut deployment failures 40% with zero-downtime blue-green rollouts.
- Secured PHI with AWS KMS field-level encryption and IAM; achieved zero HIPAA, SOC 2, and FDA findings in the 2023 audit cycle.
- Mentored 3 engineers on system design and observability; two received internal promotions.
Senior Software Engineer - Raytheon
(2012-01 - 2020-06)
Defense-contractor financial systems · DFARS/FAR regulated · 8-year tenure · 100+ external clients
- Integrated C# microservices with SAP R/3 via REST and gRPC; automated 10,000+ daily transactions at 99.9% reliability.
- Onboarded 100+ defense contractors via REST and GraphQL APIs secured with OAuth2 and JWT for real-time invoicing under DFARS/FAR compliance.
- Designed event-driven architecture with Kafka and RabbitMQ; decoupled supplier onboarding, payment processing, and audit logging for independent scaling.
- Wrote Python ETL pipelines with Kafka and MongoDB; cut manual reconciliation 50% and raised data accuracy 30%.
- Created real-time financial dashboards in C# and WPF on live Kafka and Redis streams for executive cash-flow visibility across active contracts.
- Migrated legacy financial systems to containerized microservices on AWS (EC2, S3, RDS) using Docker, Kubernetes, and Terraform under DFARS/FAR compliance.
