Thomas Lee

I am a Staff Software Engineer with 11+ years of experience building cloud-native, full-stack systems across healthcare, fintech, eCommerce, and SaaS. I specialize in designing secure, high-performance applications using modern frontend and backend technologies.

At CVS Health I led delivery of AI-powered clinical documentation, virtual assistant chatbots, and workforce optimization platforms, engineering microservices with FastAPI, Java, TypeScript, and Node.js that integrated AWS Transcribe Medical and Comprehend Medical and processed over 50K sessions daily. I optimized data pipelines with Kafka and SQS to reduce latency by 40% and built responsive, WCAG 2.1-compliant UIs supporting over 2M monthly active users, cutting provider documentation time by 35%.

Previously at Square, I delivered scalable payment processing and fraud prevention systems, building high-performance APIs in Java and Go that processed 500K+ transactions per day with sub-150ms latency. I implemented real-time monitoring, optimized database performance, and reduced chargebacks by 17% while enabling merchant expansion to 30+ countries.

I mentor engineers, collaborate across product, clinical, and data science teams, and prioritize security and compliance (HIPAA/PCI) while driving measurable product and operational improvements. I am motivated to lead technical solutions that combine AI/ML, robust engineering, and strong user experiences.