Senior Software Engineer I

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 Responsibility:

• 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:

• Experience writing unit tests and integration tests using xUnit/NUnit, TDD practices
• Experience with DevOps toolchains such as Azure DevOps, GitHub Actions, or Jenkins
• Experience supporting or integrating with data pipelines (SSIS, Azure Data Factory)
• Experience modernizing legacy systems:
  • Migration from Strongly Desired Technology skills (NET Framework 3.5 - 4.8, .NET Core, and .NET 5)to modern .NET platforms
• Hands-on experience with event-driven architecture and messaging systems:
  • Kafka, RabbitMQ, Azure Service Bus
• Data access experience using:
  • Entity Framework Core, Dapper, or similar ORM frameworks
• Agile delivery experience in Scrum teams, including sprint planning and retrospectives
• Hands-on experience building scalable applications using .NET (8/9/10), C#, and ASP.NET Core (Web API, MVC, Minimal APIs)
• Solid experience with JavaScript (ES6+) and TypeScript for modern web development
• Experience designing and building RESTful APIs, microservices, and integration services
• Experience building background/worker services and asynchronous processing solutions
• Experience working with SQL Server/Azure SQL and familiarity with NoSQL databases (Cosmos DB, MongoDB)
• Practical experience with version control (Git) and collaborative development workflows
• Experience working within CI/CD pipelines and DevOps practices
• Exposure to containerization (Docker) and basic orchestration concepts (Kubernetes)
• Exposure to cloud platforms (Microsoft Azure preferred), including app services, storage, and monitoring and delivery
• Solid proficiency in Object-Oriented Programming (OOP), design patterns, and distributed system fundamentals
• Solid working knowledge of HTML5, CSS3, and responsive UI development
• Solid SQL skills with hands-on experience in stored procedures, views, indexing, and query optimization
• Applied knowledge of SOLID principles, Clean Architecture, and layered design patterns
• Familiarity with modern hosting and deployment:
  • IIS, Kestrel, containerized apps
• Frontend development using Angular (v20+), React, or similar modern frameworks
• Understanding of API security best practices (OAuth2, JWT, API gateways)

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.