.NET Application Support Engineer
On-siteAshburn, Virginia, United States or Harrisburg, Pennsylvania, United States
Job Summary
Diagnose runtime errors, application crashes, and performance bottlenecks in high-availability .NET applications by analyzing C# source code and executing root-cause analysis. Configure, maintain, and optimize IIS web servers and application pools across staging and production environments. Develop and maintain PowerShell scripts to automate routine operations, application deployments, system health checks, and data fixes. Troubleshoot application data faults by writing and optimizing complex T-SQL queries and resolving SQL Server bottlenecks. Proactively monitor application health logs using Event Viewer, Azure Monitor, or similar tools and maintain detailed technical documentation for known errors and recovery procedures.
Required Qualifications
- 3+ years of experience supporting or developing applications using .NET Core, .NET Framework (4.x+), ASP.NET MVC, and Web API
- Strong proficiency in PowerShell
- Solid understanding of IIS architecture, including site bindings, SSL certificate management, and app pool optimization
- Proficient with Microsoft SQL Server, including writing T-SQL queries, joins, and understanding database indexing
- Experience utilizing windows diagnostic utilities, Event Viewer, log parsers (Serilog/Log4Net), or APM tools to isolate infrastructure vs. code issues
- Bachelor's degree from an accredited educational institution or equivalent combination of education and experience
Desired Qualifications
- Azure, Google, AWS
- Docker
- Azure DevOps, Jenkins, or GitHub Actions
- Jira
- Three to five years of previous experience
- A persistent, systematic approach to troubleshooting rather than guessing or applying superficial fixes
- Ability to clearly explain complex technical issues to both non-technical stakeholders and core software developers
- Comfortable balancing multiple shifting priorities in a fast-paced production environment
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