Lead Software Engineer - Dot NET 6 Plus, C Sharp, SQL Server, etc.

You will be joining Optum, a global organization dedicated to improving health outcomes by providing care, pharmacy benefits, data, and resources to help people live healthier lives. Your work with the team will play a crucial role in advancing health optimization on a global scale. Optum offers a culture of inclusion, talented peers, comprehensive benefits, and ample career development opportunities. As you start Caring, Connecting, and Growing together, you will have a chance to make a real impact on the communities we serve. **Primary Responsibilities:** - Own feature delivery end to end by breaking down moderately complex requirements, proposing design options, implementing, testing, and shipping to production with minimal supervision - Lead the modernization of legacy modules by incrementally migrating ASP.NET Web Forms (ASPX) components to .NET (Core/.NET 6+), utilizing seams/strangler patterns, automated tests, and staged rollouts - Enhance code quality and reliability by writing clean, secure, performant C# and T-SQL, adding unit/integration tests, promoting code review standards, and executing targeted refactors to reduce tech debt and enhance observability - Take operational ownership by contributing to CI/CD pipelines (GitHub Actions/Azure DevOps), defining meaningful dashboards/alerts, participating in on-call/incident reviews, and driving post-mortem actions to closure - Contribute to design efforts by shaping component and data-model designs, documenting decisions, and sharing patterns within the squad - Collaborate on the front end by implementing or reviewing JavaScript/TypeScript changes, integrating with React/Angular components, and focusing on accessibility and performance - Ensure security and compliance by default through the application of secure coding practices, secrets management, least-privilege access, and supporting audit evidence through build/deployment pipelines - Mentor and unblock others by coaching associates on design/testing habits, providing actionable PR feedback, and collaborating cross-functionally with PM/QA/SRE/UX/Data **Required Qualifications:** - Bachelor's in Computer Science or related field (or equivalent practical experience) - 6+ years of experience building services or web apps with ASP.NET or .NET (Core or .NET 6+), C#, and SQL Server - demonstrating autonomy beyond SG25's 1-3 year profile - Hands-on experience with unit or integration testing (xUnit or NUnit or MSTest), CI/CD, and basic observability (structured logs, metrics, tracing) - Working knowledge of JavaScript or TypeScript, HTML or CSS; exposure to React or Angular - Proven solid OO design, RESTful APIs, Entity Framework or Dapper, and Git (branching, PR reviews) - Proven problem-solving, communication, and cross-team collaboration skills **Preferred Qualifications:** - Demonstrated experience migrating legacy ASPX to .NET 6+ with minimal downtime and measurable risk reduction - Experience in performance tuning across app or DB (profilers, async, indexing, query plans) - Experience in applying secure by design practices (OWASP Top 10 mitigations, threat modeling basics) - Experience in mentoring associates and facilitating design or retro sessions - Practical familiarity with containers or cloud deployment (Docker or Kubernetes or AWS) At UnitedHealth Group, our mission is to help people live healthier lives and improve the health system for everyone. Regardless of race, gender, sexuality, age, location, or income, we believe everyone deserves the opportunity to live their healthiest life. We are committed to mitigating our impact on the environment and delivering equitable care that addresses health disparities and improves health outcomes - an enterprise priority reflected in our mission. You will be joining Optum, a global organization dedicated to improving health outcomes by providing care, pharmacy benefits, data, and resources to help people live healthier lives. Your work with the team will play a crucial role in advancing health optimization on a global scale. Optum offers a culture of inclusion, talented peers, comprehensive benefits, and ample career development opportunities. As you start Caring, Connecting, and Growing together, you will have a chance to make a real impact on the communities we serve. **Primary Responsibilities:** - Own feature delivery end to end by breaking down moderately complex requirements, proposing design options, implementing, testing, and shipping to production with minimal supervision - Lead the modernization of legacy modules by incrementally migrating ASP.NET Web Forms (ASPX) components to .NET (Core/.NET 6+), utilizing seams/strangler patterns, automated tests, and staged rollouts - Enhance code quality and reliability by writing clean, secure, performant C# and T-SQL, adding unit/integration tests, promoting code review standards, and executing targeted refactors to reduce tech debt and enhance observability - Take operational ownership by contr