Senior Full-Stack .NET Modernization Developer

Job Title: Senior Full-Stack .NET Modernization Developer

Duration (Contract): 8 Months

Client Location: Atlanta, GA 30334

Location Preference: Hybrid

Job Description:
As a Senior Full-Stack .NET Modernization Developer , you will lead the transformation of a mission-critical enterprise platform from legacy ASP.NET architecture to modern .NET, Azure cloud services, API-driven solutions, and React-based user experiences. This is a hands-on engineering role focused on application modernization, cloud adoption, technical leadership, and architectural innovation.

This position is ideal for a senior developer who enjoys solving complex technical challenges, driving modernization initiatives, and owning solutions from concept through production deployment. You will work in a lean, high-impact environment where accountability, technical expertise, and independent decision-making are essential to success.

Key Responsibilities:

• Lead modernization efforts by transforming legacy applications into scalable, cloud-native solutions using modern .NET and Azure technologies.

• Design and implement secure, maintainable, and high-performing application architectures that reduce technical debt and improve long-term supportability.

• Develop and enhance API-first services, integrations, and enterprise application capabilities.

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

• Manage and optimize SQL Server platforms, including database design, performance tuning, data migration, and modernization activities.

• Design, implement, and maintain CI/CD pipelines using Azure DevOps to automate build, testing, deployment, and release processes.

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

• Develop and maintain React-based user interface components supporting modernization initiatives.

• Implement frontend solutions utilizing modern rendering approaches, component-based architectures, and contemporary web development practices.

• Integrate internal and third-party services while maintaining clear technical documentation for all integrations.

• Develop and maintain reporting solutions using SSRS and Power BI.

• Participate in AI integration initiatives involving Copilot technologies, AI services, intelligent automation, and chatbot solutions.

• Provide production support, perform root-cause analysis, and resolve complex application issues.

• Maintain deployment documentation, runbooks, technical specifications, and user-facing documentation.

• Participate in architecture reviews, code reviews, sprint planning, and Agile development ceremonies.

Required Skills, Experiences, Education, and Competencies:

• 8+ years of professional software development experience using C#, ASP.NET MVC, Web API, and Microsoft .NET technologies.

• Proven hands-on experience migrating legacy ASP.NET applications to modern .NET platforms such as .NET 6, .NET 7, .NET 8, or later versions.

• Strong experience designing and developing enterprise-grade web applications, APIs, and distributed systems.

• Extensive SQL Server expertise including stored procedures, T-SQL development, query optimization, schema migrations, and database performance tuning.

• Hands-on experience with Azure App Services, Azure Functions, deployment pipelines, and application configuration management.

• Experience implementing and managing CI/CD pipelines using Azure DevOps and modern DevOps practices.

• Strong frontend development experience with React and modern JavaScript frameworks.

• Knowledge of client-side rendering (CSR), server-side rendering (SSR), component-based architectures, and modern frontend development methodologies.

• Experience integrating enterprise applications with internal and third-party APIs and services.

• Experience building and maintaining reporting solutions using SSRS and Power BI.

• Familiarity with AI-powered development tools, Copilot technologies, AI integrations, or intelligent automation solutions.

• 5+ years of experience delivering software within Agile environments using Scrum, Kanban, Azure DevOps, or GitHub.

• Strong understanding of software architecture, cloud-native development, security best practices, and application modernization strategies.

• Excellent analytical, problem-solving, communication, collaboration, and technical leadership skills.

• Ability to independently drive projects from requirements and design through deployment and operational support.

The hourly range for roles of this nature are $55.00 to $80.00/hr. Rates are heavily dependent on skills, experience, location, and industry.

cyberThink is an Equal Opportunity Employer.