SHAWN JOSEPH

Led a 15% performance upgrade of a legacy management system by migrating from ASP.NET Web Forms to ASP.NET Core, EF 6, and Angular 14; implemented microservices for Identity with AWS IAM/SSO; optimized T-SQL; modernized desktop support; improved security with OAuth2/JWT; upgraded UI and automated testing and CI/CD pipelines; led globally distributed teams.

Converted a legacy VB.NET monolith into microservices using C#, ASP.NET, MS SQL Server, RabbitMQ and AWS; achieved 10% overall performance gains and 40% reduction in AWS infrastructure costs through architectural simplification; enhanced backend processes with PL/SQL components and improved deployment/testing through established CI/CD practices.

Led architecture redesign of patient intake workflows in C# ASP.NET Core Web API (.NET 8/9), introducing async processing with Azure Functions to reduce processing time by 45%. Implemented idempotent RESTful services, validation, and resilient retries using Azure Service Bus, cutting claim submission failures by 28%. Improved HL7 parsing and dead-letter/replay tooling to achieve 99.9% lab result ingestion. Optimized FHIR API throughput by improving EF Core tracking, using Dapper queries, and tuning SQL Server indexes (2.3x throughput, 38% latency reduction). Designed versioned APIs with backward-compatible contracts, enabling faster integration. Implemented OAuth-based authentication/authorization, reducing unauthorized access by 40% and improving login speed by 30%. Delivered a responsive React/Angular SPA to reduce clinician time-to-chart by 25% and supported AI-assisted development. Increased platform availability from 99.5% to 99.95% via AKS, probes, HPA, and blue/green/rolling dep