Senior Full-Stack .NET Modernization Developer

Job Title: Senior Full-Stack .NET Modernization Developer

Location: Atlanta, GA

Type: W2 Contract

Local Atlanta, GA candidates only

10+ Years of experience required.

Required Education

Bachelor's degree in Computer Science, Information Technology, or a related field or equivalent work experience that demonstrates the same depth

Required Experience And Skills React experience specifically building components within an existing application, not greenfield Exposer to .NET 10 (3 Years)

Power BI or SSRS reporting development (3 Years)

Experience with government, healthcare, or public-sector systems you understand compliance, auditability, and data sensitivity (3 Years)

Familiarity with ADA/WCAG 2.1 AA accessibility standards (3 Years)

Exposure to Azure Agentic AI services or integration of AI-driven features in production applications (3 Years)

Experience with middleware platforms such as Boomi or MuleSoft (3 Years)

8+ years of professional .NET development experience C#, ASP.NET MVC, Web API

Demonstrated, hands-on experience migrating legacy ASP.NET applications to modern .NET (6, 7, 8 or 10) not just exposure

Production SQL Server experience: stored procedures, T-SQL tuning, schema migrations, data cleanup

Azure hands-on: App Services, Function Apps, deployment pipelines, configuration management

5+ years delivering software in Agile (Scrum or Kanban) environments using ADO or GitHub

You have modernized a real application not a proof of concept from legacy ASP.NET to .NET 6/7/8/10

You have designed and maintained RESTful APIs that external systems depend on

You have debugged production issues independently, without a team lead walking you through it

Preferred Qualifications These will make you effective faster. They are not dealbreakers, but they distinguish competitive candidates.

React experience specifically building components within an existing application, not greenfield

Exposer to .NET 10

Power BI or SSRS reporting development

Experience with government, healthcare, or public-sector systems you understand compliance, auditability, and data sensitivity

Familiarity with ADA/WCAG 2.1 AA accessibility standards

Exposure to Azure Agentic AI services or integration of AI-driven features in production applications

Experience with middleware platforms such as Boomi or MuleSoft

Background working with PII data and the security protocols that protect it

Role Overview Client core licensing platform is a mission-critical application that supports child care licensing, provider management, and program eligibility across the State of Georgia. We are in the middle of a major modernization effort, moving from a legacy ASP.NET architecture to .NET 8+, modern APIs, Azure cloud services, and a React-based user experience. This is not a maintenance or production support role.

This position is for a senior engineer who wants to lead modernization efforts, solve complex technical problems, and help shape the future architecture of a statewide platform. You will play a key role in technical design decisions, application architecture, cloud integration, and delivery. Our team is intentionally lean. That means ownership matters. You will be expected to take a solution from concept to production, including design, development, testing, deployment, documentation, and operational support. Success in this role requires initiative, accountability, and the ability to work independently.

Job Responsibilities Application Modernization (Core of this Role)

Champion the modernization of Client mission-critical licensing and eligibility applications, transitioning legacy solutions to modern .NET and Azure-based architectures.

Design and implement scalable, secure, and maintainable application solutions that reduce technical debt and improve long-term supportability.

Build and evolve API-first integrations and services that enable future platform capabilities.

Develop cloud-native solutions using Azure App Services, Azure Functions, and related Azure technologies.

Own the SQL Server platform, including data architecture, performance tuning, data migration, and platform modernization.

Implement and maintain CI/CD pipelines using Azure DevOps to automate testing, deployment, and release management.

Drive engineering excellence through code reviews, automation, documentation, and adherence to modern development practices.

Frontend & Integration

Build and maintain React-based UI components as part of the modernization roadmap

Demonstrate a strong understanding of web application rendering patterns, including client side rendering (CSR), server-side rendering (SSR), component-based architectures, and modern frontend frameworks.

Integrate third-party services and internal APIs; document every integration cleanly

Implement and maintain reporting using SSRS and Power BI

Participate in AI integration initiatives Azure Agentic AI services, Copilot tooling, and chatbot integrations where applicable

Quality, Documentation & Support

Write code that your teammates can read and maintain six months from now

Provide production support and own root-cause analysis when things break

Maintain application documentation, deployment runbooks, and user-facing guides

Participate in architecture reviews, code reviews, and sprint ceremonies