Senior 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.

Primary Responsibilities:

• Full Stack Development:
  • Build and enhance scalable web applications using Java (Spring Boot), React.js, and AWS
  • Integrate AI-driven components such as smart search, personalized recommendations, and conversational interfaces
  • Optimize application performance, security, and reliability
  • Integrate AI-driven components such as smart search, personalized recommendations, and conversational interfaces
  • Collaborate with UX/UI designers to create intuitive, responsive, and accessible user experiences
  • Continuously experiment with AI-assisted workflows to improve development velocity and code quality
  • Participate in architecture design, code reviews, and agile ceremonies
  • Mentor peers on best practices for AI-assisted development
  • Work within Scrum or Kanban frameworks, participating in sprint planning, daily stand-ups, retrospectives, and demos
  • Collaborate closely with Product Owners, Scrum Masters, and cross-functional teams to deliver incremental value
  • Use tools like JIRA, Confluence, and Git to manage work and documentation
  • Embrace a test-driven development (TDD) and shift-left testing mindset to ensure quality from the start
• AI Builder Responsibilities:
  • Use GenAI tools (Copilot, Claude, Gemini AI) to ideate, prototype, and implement features efficiently
  • Apply Vibe coding techniques to maintain clean, expressive, and AI-augmented codebases
  • Develop internal tools and scripts using AI to automate repetitive tasks and improve productivity
  • Stay current with emerging GenAI trends, tools, and ethical considerations
• 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:

• Fulltime graduation degree
• 7+ years of experience in full stack development with Java (Spring Boot) and React.js
• Solid experience with AWS services (Lambda, API Gateway, S3, DynamoDB, etc.)
• Proven experience using AI coding assistants like GitHub Copilot, Claude, Gemini AI
• Experience working in Agile teams with a solid understanding of Agile principles and ceremonies 
• Solid understanding of RESTful APIs, microservices architecture, and CI/CD pipelines Familiarity with prompt engineering, LLM APIs, and AI-enhanced development workflows

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.