Software Engineering Lead- Dot NET 6+, C#, SQL Server

Optum is a global organization that delivers care, aided by technology to help millions of people live healthier lives. The work you do with our team will directly improve health outcomes by connecting people with the care, pharmacy benefits, data and resources they need to feel their best. Here, you will find a culture guided by inclusion, talented peers, comprehensive benefits and career development opportunities. Come make an impact on the communities we serve as you help us advance health optimization on a global scale. Join us to start Caring. Connecting. Growing together.
Primary Responsibilities:

• Own feature delivery end to end: break down moderately complex requirements, propose design options with trade-offs, implement, test, and ship to production with minimal supervision
• Modernize legacy modules: lead incremental migration of ASP.NET Web Forms (ASPX) components to .NET (Core/.NET 6+), using seams/strangler patterns, automated tests, and staged rollouts
• Raise code quality and reliability: write clean, secure, performant C# and T-SQL; add unit/integration tests; champion code review standards and targeted refactors that reduce tech debt and improve observability
• Operational ownership: contribute to CI/CD pipelines (GitHub Actions/Azure DevOps), define meaningful dashboards/alerts, participate in on-call/incident reviews, and drive post-mortem actions to closure
• Design contributions: help shape component and data-model designs (API contracts, caching, indexing), document decisions (ADRs, diagrams), and socialize patterns within the squad
• Front end collaboration: implement or review JavaScript/TypeScript changes and integrate with React/Angular components with attention to accessibility and performance
• Security and compliance by default: apply secure coding practices, secrets management, least-privilege access, and support audit evidence through build/deployment pipelines
• Mentor and unblock others: coach associates on design/testing habits, provide actionable PR feedback, and collaborate cross-functionally with PM/QA/SRE/UX/Data
• Comply with the terms and conditions of the employment contract, company policies and procedures, and any and all directives (such as, but not limited to, transfer and/or re-assignment to different work locations, change in teams and/or work shifts, policies in regards to flexibility of work benefits and/or work environment, alternative work arrangements, and other decisions that may arise due to the changing business environment). The Company may adopt, vary or rescind these policies and directives in its absolute discretion and without any limitation (implied or otherwise) on its ability to do so

Required Qualifications:

• Bachelor's in Computer Science or related field (or equivalent practical experience)
• 6+ years 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 make the health system work better for everyone. We believe everyone-of every race, gender, sexuality, age, location and income-deserves the opportunity to live their healthiest life. Today, however, there are still far too many barriers to good health which are disproportionately experienced by people of color, historically marginalized groups and those with lower incomes. We are committed to mitigating our impact on the environment and enabling and delivering equitable care that addresses health disparities and improves health outcomes - an enterprise priority reflected in our mission.