Full-Stack Engineer (AI / .NET)

Job Title: Full-Stack Engineer (AI / .NET)Pay Rate: $50 – $60 per hour W2Location: Phoenix - HybridDue to government restrictions, only U.S. citizens and Green Card Holders will be considered for this position. No third parties or C2C.Our client is an innovative organization dedicated to modernizing administrative infrastructure and optimizing operational efficiency. We are seeking a Lead Systems Automation Analyst to spearhead the evolution of enterprise platforms, bridging the gap between established legacy architectures and cutting-edge artificial intelligence solutions. This unique role provides an incredible growth opportunity where you will interact directly with senior stakeholders, influence modern system architecture, and introduce intelligent automation to transform how critical processes are executed.Here’s What You’ll Be DoingArchitecting and rebuilding key enterprise portals, completely transforming legacy applications into highly responsive, AI-augmented user interfaces.Harnessing internal large language model (LLM) frameworks, specifically customized instances of Claude, to prototype, build, and deploy custom workflow tools tailored for specialized decision making support.Designing and engineering scalable backend services and secure web APIs utilizing .NET Core, C#, and modern RESTful integration patterns.Collaborating with operational business units and technical teams to gather requirements, extract workflow logic, and author comprehensive system blueprints.Evaluating and embedding emerging AI technologies, including Copilot and Azure OpenAI APIs, to drive intelligent workflow automation and enhance business intelligence.Maintaining and supporting existing legacy systems, including localized troubleshooting and tactical data migrations within a PowerBuilder environment during active modernization phases.Mentoring engineering peers, performing code reviews, and championing best practice software development lifecycles (SDLC).Here’s What Our Ideal Candidate HasPractical familiarity with prompt engineering, LLM API integrations, or building user-facing applications powered by tools like Claude or OpenAI.A strong passion for modern web interfaces, with a proven ability to take a dated legacy UI and redesign it into a fluid, user-centric application using JavaScript, TypeScript, HTML5, and CSS.Full-stack software development experience featuring deep mastery of .NET Core, ASP.NET Core, C#, and relational database management using SQL Server and T-SQL.A clear history of sitting with non-technical business users to gather requirements and translate operational problems into structured technical specifications.Exposure to AI-assisted development tools, Azure/cloud ecosystems, PowerBuilder environments, or prior experience operating within judicial, legal, or public sector frameworks.Keywords: Senior .NET Developer, Full-Stack Engineer, C# Developer, .NET Core, ASP.NET Core, Application Modernization, Artificial Intelligence, Claude API, Azure OpenAI, LLM Integration, PowerBuilder, SQL Server, T-SQL, UI/UX Redesign#AccessData