Senior Full-Stack .NET Modernization Developer

NOTE:

• Send your resume to [email protected]
• Local to Atlanta, GA
• Hybrid is required

Short Description:
Under general supervision, designs, codes, tests, modifies and debugs computer software.

Complete Description:

What This Role Actually Is 

• DECAL's core licensing platform is a mission-critical application that supports childcare 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. 
• If you're looking for a highly structured environment where work is narrowly defined and tasks are handed to you step-by-step, this is probably not the right fit. If you enjoy building, leading, and owning outcomes, you'll thrive here.

Work Location:

• Must be physically located in Georgia 
• Hybrid: Tuesday–Thursday on-site at DECAL headquarters, Atlanta (subject to manager 
• discretion) 
• Mandatory in-person: All Hands, Enterprise Applications meetings, DECAL All Staff, and 
• designated on-site milestones

What You Will Do:

• Application Modernization (Core of this Role) 
• Champion the modernization of DECAL's 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 
• 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 

Required Qualifications:

EXPERIENCE 

• 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 

WHAT HANDS-ON MEANS HERE:

• 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 
• 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 

Education:

• Bachelor’s degree in computer science, Information Technology, or a related field — or 
• equivalent work experience that demonstrates the same depth 

What We Value Beyond the Technical:

• This team works on systems that affect real families in Georgia. We move fast because the mission 
• requires it, but we do not cut corners on security, accessibility, or data integrity. 
• Ownership: You finish what you start, and you tell people early when something is at risk 
• Directness: You surface problems with a proposed fix, not just a flag 
• Clarity under pressure: You can explain a technical constraint to a non-technical stakeholder 
• without condescending or drowning them in jargon 
• Adaptability: Government systems change scope. Requirements shift. You adjust without drama