Senior Full-Stack .NET Modernization Developer

Tiltedge Solutions; Atlanta (GA); On-site; USD 110,000 - 160,000; Full time

Job summary

Tiltedge Solutions is seeking an experienced Senior .NET developer to drive modernisation of critical licensing applications. You will migrate legacy ASP.NET to modern .NET and Azure, build API-driven services, and own the SQL Server platform.

You will implement CI/CD with Azure DevOps, produce maintainable code, and collaborate across teams to reduce technical debt while enabling scalable, secure cloud-native solutions.

Qualifications

• 8+ years of professional .NET development experience including C#, ASP.NET MVC and Web API.
• Experience migrating legacy ASP.NET apps to modern .NET (6/7/8/10).
• Production SQL Server experience including stored procedures, T-SQL tuning, and migrations.
• 5+ years delivering software in Agile environments (Scrum or Kanban) using ADO or GitHub.

Responsibilities

• Champion modernization of critical licensing/eligibility apps to .NET and Azure architectures.
• Design scalable, secure, and maintainable solutions to reduce technical debt.
• Build API-first integrations and services for future platform capabilities.
• Develop cloud-native solutions using Azure App Services and Functions.
• Own SQL Server platform including data architecture, performance tuning, and migrations.
• Implement and maintain CI/CD pipelines using Azure DevOps for automated testing and deployment.
• Drive engineering excellence via code reviews, automation, and documentation.

Skills

.NET development

C#

ASP.NET MVC

Web API

Agile development

ADO

GitHub

SQL Server

T-SQL

Data migration

Education

Bachelor's degree or equivalent experience

Tools

ADO

GitHub

Job description

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 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 clientside 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
• 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