Senior Full-Stack Engineer Optum (UnitedHealth Group)
I build and own full-stack features for a healthcare claims and prior-authorization platform serving more than 10,000 concurrent users at 99.95% availability. I develop responsive React and TypeScript interfaces for claims review, eligibility, and authorization workflows, supported by FastAPI REST and GraphQL services, PostgreSQL, MongoDB Atlas, SQLAlchemy, and Redis caching.
I also develop AI-assisted clinical coding and automation services using Python, AWS Bedrock, RAG pipelines, and OpenSearch vector search. I secure APIs with OAuth 2.0, OIDC, and JWT; deploy services on AWS EKS using Kubernetes, Helm, and Terraform; maintain GitLab CI quality gates with SonarQube; and monitor systems through OpenTelemetry, Prometheus, and Grafana.