Senior Full-Stack .NET Modernization Developer

Senior Full-Stack .NET Modernization Developer

Location: Atlanta, GA (Hybrid)
Duration: Long Term Contract

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)

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

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

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

Education

Bachelor's degree in Computer Science, Information Technology, or a related field or

equivalent work experience that demonstrates the same depth