Senior Full-Stack .NET Modernization Developer

Position Title: Senior Full-Stack .NET Modernization Developer

Location: Atlanta, GA

Engagement Type: Contract

Work Mode: Hybrid

Duration: ~8 Months (10/26/2026 06/30/2027)

Interview Type: Either Web Cam or In Person

We are seeking a Senior Full-Stack .NET Modernization Developer to lead the technical transformation of a mission-critical public sector licensing and eligibility platform. This role focuses on transitioning legacy ASP.NET architecture to modern .NET (6/7/8/10), RESTful APIs, Azure cloud services, and React-based UI components. Working in an agile environment, the position involves leading architectural decisions, cloud integration, data migration, and delivering scalable solutions from concept to production.

Key Responsibilities
Lead the modernization of core licensing and eligibility applications from legacy ASP.NET to modern .NET and Azure-based architectures.
Design, build, and maintain scalable RESTful APIs, API-first integrations, and services.
Develop cloud-native solutions using Azure App Services, Azure Functions, and associated Azure technologies.
Manage the SQL Server platform, including data architecture, T-SQL performance tuning, schema migrations, and data cleanup.
Implement and maintain CI/CD pipelines using Azure DevOps for automated testing, deployment, and release management.
Build and integrate React-based UI components within existing application frameworks.
Develop and maintain reporting solutions using SSRS and Power BI.
Participate in AI integration initiatives, including Azure Agentic AI services, Copilot tooling, and chatbot features.
Conduct code reviews, maintain system documentation and runbooks, and perform root-cause analysis for production issues

Required Skills & Experience
8+ years of professional .NET development experience using C#, ASP.NET MVC, and Web API.
Demonstrated hands-on experience migrating production applications from legacy ASP.NET to modern .NET (.NET 6, 7, 8, or 10).
Production SQL Server experience with stored procedures, T-SQL tuning, schema migrations, and data cleanup.
Hands-on Azure experience with App Services, Function Apps, deployment pipelines, and configuration management.
5+ years delivering software in Agile (Scrum or Kanban) environments using Azure DevOps or GitHub.
Proven experience independently debugging production issues and building RESTful APIs consumed by external systems.
Bachelor's degree in Computer Science, Information Technology, or equivalent work experience.

Preferred Skills
3+ years of experience building React components within existing applications.
3+ years of experience in Power BI or SSRS reporting development.
3+ years of experience with government, healthcare, or public-sector systems, including understanding of compliance, auditability, and PII data security protocols.
3+ years of experience or familiarity with ADA/WCAG 2.1 AA accessibility standards.
3+ years of experience with middleware platforms such as Boomi or MuleSoft.
3+ years of exposure to Azure Agentic AI services or integration of AI-driven features in production applications.
Exposure to .NET 10.

Additional Details
Work Arrangement: Hybrid schedule requiring on-site presence Tuesday through Thursday in Atlanta, GA, along with mandatory in-person attendance for key team meetings and milestones.
Location Requirement: Candidates must be physically located in Georgia.
Schedule: Standard full-time schedule (8 hours per day, 5 days per week).