Senior.Net Full-Stack Engineer

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.

You'll enjoy the flexibility to telecommute* from anywhere within the U.S. as you take on some tough challenges.

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
• Development skills - As an AI Builder create Code for the project along with other development resources

You'll be rewarded and recognized for your performance in an environment that will challenge you and give you clear direction on what it takes to succeed in your role as well as provide development for other roles you may be interested in.

Required Qualifications:

• Bachelor's degree in Computer Science, Software Engineering, or a related technical field OR having equivalent experience
• 8+ 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
• 4+ years of experience designing, developing, and integrating RESTful APIs and microservice architectures
• 2+ years of experience designing and deploying cloud-native applications on Microsoft Azure (including Azure Functions or similar serverless components)
• 1+ years of hands-on experience orchestrating and managing containerized deployments using Azure Kubernetes Service (AKS) or equivalent Kubernetes-based container technologies
• 1+ years Experience with AI productivity and engineering tools such as GitHub Copilot, Microsoft 365 Copilot, Codex, Claude, and Visual Studio Code-based AI-assisted
• 1+ years Proven solid engineering fundamentals including APIs, microservices, scalable system design, testing, debugging, documentation, and secure development practices

Preferred Qualifications:

• Experience in the healthcare domain is preferred; claims process knowledge and provider services experience are highly recommended
• Experience working with Angular technology
• 1+ year of experience working with GitHub Copilot, Microsoft 365 Copilot, Codex, Claude, and Visual Studio Code-based AI-assisted development
• Strong 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

*All employees working remotely will be required to adhere to UnitedHealth Group's Telecommuter Policy

Pay is based on several factors including but not limited to local labor markets, education, work experience, certifications, etc. In addition to your salary, we offer benefits such as, a comprehensive benefits package, incentive and recognition programs, equity stock purchase and 401k contribution (all benefits are subject to eligibility requirements). No matter where or when you begin a career with us, you'll find a far-reaching choice of benefits and incentives. The salary for this role will range from $91,700 to $163,700 annually based on full-time employment. We comply with all minimum wage laws as applicable.  

Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.

Application Deadline: This will be posted for a minimum of 2 business days or until a sufficient candidate pool has been collected. Job posting may come down early due to volume of applicants.

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.

Diversity creates a healthier atmosphere: UnitedHealth Group is an Equal Employment Opportunity/Affirmative Action employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, age, national origin, protected veteran status, disability status, sexual orientation, gender identity or expression, marital status, genetic information, or any other characteristic protected by law.

UnitedHealth Group is a drug-free workplace. Candidates are required to pass a drug test before beginning employment.

#RPO, #GREEN