Contract
Posted on 29 December 25 by John Maher
Powered by Tracker
Location: Phoenix, AZ (2–3 days onsite per week)
Engagement: Contract
Experience Level: Mid–Senior (approximately 6–7 years)
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.
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
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
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