Dave K.

I help companies fix broken .NET applications, modernize legacy systems, and ship features that actually move the needle — not just close tickets. 25 years building production C#/.NET and SQL Server systems. I've architected systems for Fortune 500 clients, led teams of 15+ developers, and spent 6 years as an independent contractor on a single ERP engagement — meaning my clients keep me around because the work is good. WHAT I'M KNOWN FOR • Cutting a 15-hour batch process to 5 minutes • Cutting an ERP data import process down to a fraction of its prior runtime • Converting an Access system to SQL Server and decreasing run-time by 75% • Taking over a failing project and delivering it to client expectations • Designing OLTP databases that hold up under real production load WHAT I BUILD • Full-stack web applications: C#/.NET, ASP.NET, API, Angular, React, TypeScript • SQL Server: schema design, T-SQL, stored procedures, query tuning, performance optimization, ETL, SSIS • Legacy modernization: ColdFusion → .NET, ASP.NET → modern .NET, VB.NET → C#, on-prem → Azure • Integration work: WCF, REST APIs, EDI, Dynamics AX, claims-based security, Active Directory • Architecture: service-oriented design, microservices, CI/CD pipelines, branching strategies, code reviews INDUSTRIES I'VE SHIPPED IN Logistics • Human Resources • Transportation • Healthcare • Insurance • State Government (PA Courts, PA Emergency Management, WIC, State Fire Academy) • E-commerce • EDI/Distribution HOW I WORK I'm direct. I scope before I commit. I ship working software, not slideware. If your project is a mess and you need someone to come in, assess honestly, and either fix it or tell you it can't be fixed, that's my zone. I'm a strong fit if you need: ✓ A senior engineer who can work without hand-holding ✓ Modernization of a .NET app you've been afraid to touch ✓ SQL Server performance work — slow queries, bad schemas, blocking ✓ Interim coverage while you search for a full-time hire ✓ Full-stack delivery on a fixed-fee project where the spec is solid I'm probably not your guy if: ✗ You want the cheapest hourly rate ✗ The work is junior-level CRUD ✗ You're looking for someone to "figure out what to build" without product input from your side Available 20–40 hrs/week, US-based (Harrisburg, PA), Eastern time. Happy to do a 30-minute discovery call to see if we're a fit before either of us commits.