Senior Full Stack Engineer

Requisition Number: 2366200
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:

• Design, develop, and maintain scalable full-stack applications using Java/TypeScript, React, and Python
• Build reliable backend services, APIs, microservices, and integrations that support enterprise-grade application and AI use cases
• Design and implement agentic AI capabilities, including task automation, tool orchestration, workflow execution, and integration with enterprise systems
• Build scalable AI agents that can reason over data, call APIs/tools, support multi-step workflows, and deliver measurable business value
• Integrate AI services, LLMs, RAG patterns, embeddings, vector search, and prompt workflows into production applications
• Collaborate with product, architecture, data science, UX, QA, security, and DevOps teams to deliver secure, high-quality solutions
• Participate in code reviews, testing, troubleshooting, performance optimization, documentation, and CI/CD delivery activities
• Apply secure engineering practices, responsible AI principles, data privacy standards, and enterprise compliance requirements throughout the development lifecycle
• 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:

• B.Tech or B.E degree in Computer Science / Information Technology, or a related field
• 7+ years of hands-on software development experience with full-stack engineering responsibilities
• Hands-on experience with Java-based backend development using frameworks such as Spring Boot, Spring MVC, or similar enterprise frameworks
• Hands-on exposure to AI tools and technologies such as LLMs, prompt engineering, RAG, embeddings, vector databases, semantic search, and AI service APIs
• Solid experience with TypeScript, JavaScript, React, reusable UI components, state management, and modern frontend development practices
• Practical experience with Python for automation, backend services, AI integrations, data processing, or agent development
• Experience designing and developing RESTful APIs, microservices, event-driven integrations, and secure application services
• Experience building or integrating AI agents, copilots, chat assistants, workflow agents, or automation agents into enterprise applications
• Experience with Git, CI/CD pipelines, automated testing, code quality practices, and agile delivery methodologies
• Solid understanding of scalable application architecture, distributed systems, API security, authentication, authorization, and performance optimization
• Proven analytical, troubleshooting, communication, and collaboration skills with the ability to work across engineering and business teams

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.
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