Senior Software Engineer II

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:

• Design, develop, test, and maintain scalable enterprise applications using C#, ASP.NET Core/.NET Core, Web APIs, and SQL Server
• Architect and implement microservices-based solutions, ensuring high availability, scalability, security, and performance
• Develop and consume RESTful APIs and integrate with internal and external systems
• Build responsive and user-friendly front-end applications using Angular, TypeScript, HTML5, CSS3, and Bootstrap
• Design and optimize database schemas, write efficient T-SQL queries, stored procedures, and performance-tuned SQL solutions
• Implement secure authentication and authorization mechanisms using JWT, OAuth 2.0, and industry best practices
• Maintain CI/CD pipelines using GIT actions to automate build, deployment, and release processes
• Containerize applications using Docker and deploy/manage workloads on Kubernetes platforms
• Collaborate with cross-functional teams including Product Owners, Architects, QA Engineers, and DevOps teams to deliver high-quality solutions
• Apply SOLID principles, Clean Architecture, Design Patterns, and best coding practices to ensure maintainable and robust software
• Participate in code reviews, technical design discussions, troubleshooting, and root cause analysis of production issues
• Develop unit and integration tests to ensure application quality, reliability, and performance
• Monitor applications, identify bottlenecks, and implement performance improvements
• Work within Agile/Scrum teams, contributing to sprint planning, estimation, backlog refinement, and release activities
• Mentor junior developers and contribute to continuous improvement initiatives, technical standards, and engineering best practices
• Design, develop, and deploy AI-powered solutions to address complex business challenges with emphasis on responsible use of AI
• 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 degree in Computer Science, Software Engineering, or a related technical field OR having equivalent experience
• 10+ years of technical experience designing and developing large enterprise solutions using C#, .NET Framework, .NET Core, SQL Server, Entity Framework, micro services architecture, and domain driven design
• 5+ years of technical experience designing and developing web solutions using Angular and React, RESTful APIs and microservice architectures
• Experience with AI productivity and engineering tools such as GitHub Copilot, Microsoft 365 Copilot, Codex, Claude, and Visual Studio Code-based AI-assisted development
• Proven solid engineering fundamentals including APIs, microservices, scalable system design, testing, debugging, documentation, and secure development practices

Preferred Qualifications:

• 1+ years of experience working with GitHub Copilot, Microsoft 365 Copilot, Codex, Claude, and Visual Studio Code-based AI-assisted development
• Experience working with Angular technology
• Solid experience designing, configuring, and executing automated CI/CD pipelines (e.g., Azure DevOps, GitHub Actions)

AI Skills and Productivity Expectations:

• Demonstrate baseline proficiency in enterprise-approved AI tools including GitHub Copilot, Microsoft 365 Copilot, Codex, Claude, and other approved GenAI platforms
• Maintain consistent use of AI tools, with an expectation of minimum 90% weekly usage where applicable to coding, documentation, analysis, and delivery workflows
• Apply AI tools to improve developer productivity, solution quality, documentation efficiency, testing support, data analysis, and decision-making workflows
• Stay current with evolving AI capabilities, LLM frameworks, agentic patterns, RAG techniques, and enterprise AI governance expectations

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.