.Net Programmer 5

Position Title: Senior .NET Developer (ASP.NET Core / C# / Azure) Location: Columbus, OH Clearance Requirements: Background Check Required Position Status: Contract Pay Rate: $45/HR ON W2 Position Description: We are seeking a highly skilled Senior .NET Developer to join a collaborative Agile team supporting mission-critical applications in a public sector environment.

This role focuses on modernizing legacy systems into scalable, high-performance .NET applications using C#, ASP.NET Core MVC, Web API, and SQL Server.

You will work cross-functionally with project managers, business analysts, QA engineers, and product owners to deliver end-to-end solutions-from requirements gathering and system design to development, deployment, and production support.

This is an excellent opportunity for a developer passionate about clean architecture, microservices, and cloud-ready applications in a high-impact, public safety-focused environment.

Key Responsibilities: * Design, develop, and maintain ASP.NET Core MVC and Web API applications using C# and .NET Core (.NET 5/6/8) * Lead modernization efforts by rewriting legacy applications into scalable N-tier architectures * Collaborate in Agile/Scrum environments to deliver high-quality software solutions * Develop and optimize RESTful APIs and web services * Work with SQL Server for database design, development, and performance tuning * Implement Entity Framework (EF) for data access and ORM solutions * Contribute to CI/CD pipelines using Azure DevOps (Git, Boards, Pipelines) * Apply Test-Driven Development (TDD) and modern testing strategies * Support microservices architecture and service-oriented design (SOA/WCF) * Participate in code reviews, technical design sessions, and mentoring junior developers * Ensure applications are mobile-compliant, secure, and performance-optimized * Develop and maintain SSRS reports and AJAX-based front-end interactions * Provide production support and troubleshooting for deployed applications Required Skills / Education: * 10+ years of experience in .NET Web Development * Strong expertise in C#, ASP.NET Core MVC, and Web API development * 10+ years of experience with SQL Server (database design & development) * Hands-on experience with Entity Framework (EF) * Experience with Service-Oriented Architecture (SOA) and WCF * Solid understanding of N-tier architecture and distributed systems * Experience with Azure DevOps / TFS (Git, CI/CD, Boards, Pipelines) * 5+ years working in Agile/Scrum environments * Experience building RESTful APIs and web services * Familiarity with AJAX, SSRS reporting, and mobile-responsive applications * Experience using Visual Studio 2019 or later * Exposure to Test-Driven Development (TDD) or automated testing strategies * Experience with microservices architecture * Strong problem-solving, analytical, and organizational skills * Excellent communication, collaboration, and leadership abilities Preferred Qualifications: * Experience with cloud platforms (Azure preferred) * Prior experience supporting government or public safety systems * Proven ability to mentor and guide technical teams What Makes You Successful in This Role: * Strong ownership mindset with the ability to work independently and collaboratively * Ability to communicate complex technical concepts clearly to stakeholders * Passion for continuous improvement, clean code, and scalable architecture * A team-first attitude with strong collaboration and negotiation skills About Seneca Resources At Seneca Resources, we are more than just a staffing and consulting firm-we are a trusted career partner.

With offices across the U.S.

and clients ranging from Fortune 500 companies to government organizations, we provide opportunities that help professionals grow their careers while making an impact.

When you work with Seneca, you're choosing a company that invests in your success, celebrates your achievements, and connects you to meaningful work with leading organizations nationwide.

We take the time to understand your goals and match you with roles that align with your skills and career path.

Our consultants and contractors enjoy competitive pay, comprehensive health, dental, and vision coverage, 401(k) retirement plans, and the support of a dedicated team that advocates for you every step of the way.

Seneca Resources is proud to be an Equal Opportunity Employer, committed to fostering a diverse and inclusive workplace where all qualified individuals are encouraged to apply.