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.

We are looking for a Full Stack Engineer who can own both the React-based frontend and the Java backend.

Primary Responsibilities:

• Frontend (React)
  • Build and maintain modular, high-performance UI components with Reactjs (TypeScript preferred)
  • Integrate UI securely with backend APIs (AWS API Gateway)
• Backend
  • Focus on clean code, testing, and debugging
• Integrate with upcoming agentic frameworks, including:
  • AWS Bedrock Agents (multi-step automation, tool calling)
• DevOps, Security and Collaboration
  • Work on CI/CD pipelines (GitHub Actions or AWS Code Pipeline)
  • Ensure secure authentication/authorization with AWS IAM and API Gateway
• 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:

• Frontend
  • Solid hands-on experience in React.js/ JavaScript
  • Expertise in consuming REST APIs securely (JWT, CORS, etc.)
• Backend
  • 8+ years of software development experience
  • Hands-on experience with Kafka
  • Experience building REST APIs
  • Experience building microservices or APIs
  • Experience working in Agile teams
  • Working knowledge of NoSQL databases (Dynamo Db preferred)
  • Good understanding of DynamoDB (schema design, GSI/LSI, partition keys)
  • Familiarity with S3, presigned URLs, data ingestion flows
  • Solid Core Java and Spring Boot skills
  • Exposure to AI/ML tools or APIs (e.g., using AI services for automation, analysis, or developer productivity)
  • Proven skills in designing REST APIs (API Gateway)
• General Engineering
  • Experience in unit testing and integration testing mindset
  • Test Automation Experience
  • Solid understanding of Git, branching strategies, code reviews
  • Demonstrated ability to write clean, maintainable, well-documented code
• DevOps
  • CI/CD pipelines (GitHub Actions, CodePipeline) experience

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.