Senior ASP.NET​/C# Developer

Senior ASP.NET / C# Developer

Location:Sparks, MD / Annapolis Junction, MD
Employment Type: Full-time
Work Arrangement: Hybrid

Hillis-Carnes Engineering Associates is seeking an experienced Senior ASP.NET / C# Developer to develop, enhance, and support business applications using Microsoft technologies.

Responsibilities

• Develop and maintain web applications using ASP.NET, C#, and SQL Server.
• Support and modernize existing ASP.NET Web Forms and MVC applications.
• Develop application features, APIs, integrations, reports, and internal tools.
• Write and optimize SQL queries, stored procedures, and data-access code.
• Troubleshoot application, database, and production issues.
• Collaborate with business users and technical teams to define and implement solutions.
• Participate in code reviews, testing, deployment, and technical documentation.
• Follow secure coding and software-development best practices.

Required Qualifications

• Bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent professional experience.
• Seven or more years of professional experience developing applications with C#, ASP.NET, and SQL Server.
• Experience with ASP.NET Web Forms, MVC, NET Core, and Core API.
• Experience with RESTful APIs.
• Experience with WPF is a plus.
• Strong SQL Server and database-development skills.
• Proficiency with HTML, CSS, JavaScript, and jQuery.
• Experience with Git or another source-control system.
• Experience using AI-assisted development tools, such as Git Hub Copilot, Claude Code, ChatGPT for coding, debugging, testing, and documentation, with the ability to review AI-generated output for accuracy, security, and maintainability.
• Strong troubleshooting, communication, and problem-solving skills.
• Ability to work independently and as part of a team.

Preferred Qualifications

• Experience with Dev Ops, including IIS, SSL, Windows Server, and application deployment.
• Experience with Telerik, Syncfusion, Microsoft Graph, or third-party system integrations.
• Experience modernizing legacy business applications.

Hillis-Carnes offers a comprehensive benefits package including Employee Stock Ownership Plan (ESOP), medical (with Health Savings Account Options), Dental, Vision, company-paid life and long-term disability, wellness incentives, generous PTO and paid holidays, 401k with company match, and much more!

HCEA is an Equal Opportunity/Affirmative Action employer. Minorities and Women are encouraged to apply.