Principal Software 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 diversity and inclusion, talented peers, comprehensive benefits and career development opportunities. Come make an impact on the communities we serve as you help us advance health equity on a global scale. Join us to start Caring. Connecting. Growing together

As a Principal .NET Software Engineer, you will be a technical leader, architecting and delivering high-impact solutions on our .NET platform. You’ll collaborate closely with cross-functional teams to define strategy, mentor fellow engineers, and ensure our systems are scalable, secure, and maintainable.

Primary Responsibilities:

• Architect & Design: Lead the end-to-end design of complex .NET applications, microservices, and integrations
• Technical Leadership: Serve as the go-to expert for .NET best practices, promoting clean code, test automation, and DevOps
• Mentorship: Coach and mentor senior and mid-level engineers, fostering continuous learning and knowledge sharing
• Code Quality & Reviews: Define coding standards, conduct thorough code reviews, and drive refactoring initiatives.
• Cross-Functional Collaboration: Partner with Product, QA, and DevOps teams to translate requirements into robust technical solutions
• Performance & Reliability: Identify and resolve performance bottlenecks; implement monitoring, logging, and disaster-recovery strategies
• Innovation: Evaluate and introduce new tools, frameworks, and architectural patterns to improve developer productivity and user experience
• Roadmap & Strategy: Contribute to technology roadmaps, capacity planning, and long-term vision for the .NET platform
• 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 or Master’s degree in Computer Science, Engineering, or related field
• 8+ years of professional experience building enterprise-grade .NET applications
• Deep expertise with C#, ASP.NET Core (or .NET 5+), Entity Framework, and RESTful API design
• Proven track record designing and operating microservices on cloud platforms (e.g., Azure, AWS)
• Solid understanding of CI/CD pipelines, containerization (Docker, Kubernetes), and infrastructure as code
• Proven excellent problem-solving skills and ability to make sound technical decisions under ambiguity
• Outstanding communication skills; able to present complex ideas clearly to technical and non-technical stakeholders

Preferred Qualifications:

• Hands-on experience with message-based architectures (e.g., Azure Service Bus, RabbitMQ)
• Experience in a regulated industry (e.g., finance, healthcare) with strict compliance requirements
• Background in domain-driven design (DDD), event-driven architecture, or CQRS

Core Competencies:

• Strategic Thinking: Can translate business goals into scalable technical solutions
• Influence & Collaboration: Builds consensus and drives alignment across distributed teams
• Ownership: Takes end-to-end responsibility for project delivery and operational excellence
• Adaptability: Quickly learns new technologies and adapts to evolving requirements
• Empathy & Mentorship: Invests in team growth through constructive feedback and guidance

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.