.NET Core Developer - Mid-Senior Level

Location: Phoenix, AZ (2 3 days onsite per week)

Engagement: Contract

Experience Level: Mid Senior (approximately 6 7 years)

About the Role

We are seeking a Mid Senior .NET Developer to play a key role in a multi-year modernization effort focused on migrating legacy applications to .NET Core. This position blends hands-on technical work with team leadership through influence, mentorship, and collaboration.

This is not a lone wolf role. The ideal candidate brings solid technical judgment, patience with legacy systems, and a willingness to help guide junior developers while adapting to the pace and structure of a large organization.

What You ll Be Doing

• Lead and execute the replatforming of legacy .NET applications into .NET Core
• Design and implement modern backend services with AWS integration
• Support frontend and backend integration across modernization and new development efforts
• Collaborate with developers of varying experience levels, offering guidance and support
• Work within Agile-style workflows, adapting as needed to organizational constraints
• Partner with stakeholders to balance modernization goals with operational realities

What We re Looking For

• 5+ years of strong, hands-on experience with .NET Core and .NET
• Proven experience modernizing or refactoring legacy applications
• Comfort working in large, structured, or public-sector-style environments
• Experience contributing to or leading work in Agile teams
• Strong communication skills and a collaborative, adaptable mindset
• Willingness to work onsite two to three days per week

Nice to Have

• AWS experience supporting .NET Core applications
• Prior work in public sector or large enterprise organizations
• Exposure to AI-enabled or cloud-native modernization frameworks
• Experience supporting both frontend and backend development