Senior AI/ML Engineer

Requisition Number: 2333083
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:

• Lead design and development of advanced AI/ML solutions for ECS Big Bets and AI 10.0 initiatives
• Provide technical leadership and architecture guidance for AI systems, LLM integrations, and agentic/multi-agentic solutions
• Drive innovation in AI workflows, including prompt engineering, LLM gateways, and Model Context Protocol (MCP)
• Mentor and coach junior engineers, ensuring best practices in coding, testing, and solution design
• Oversee end-to-end delivery, including model development, optimization, and production deployment
• Ensure quality and reliability through unit testing, code coverage, and automation frameworks
• Collaborate with global teams to align solutions with enterprise standards, security, and compliance
• Stay ahead of emerging AI technologies and incorporate them into strategic initiatives
• 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:

• Undergraduate degree or equivalent experience
• 8+ years of software engineering experience, with at least 5+ years in AI/ML solution development
• Deep hands-on experience with Large Language Models (LLMs), prompt engineering, LLM gateways, and Model Context Protocol (MCP)
• Experience with CI/CD pipelines, deployment automation, and cloud platforms (Azure/AWS)
• Advanced knowledge of unit testing, code coverage, and test automation frameworks
• Proficiency in Python, and experience with React, Next.js, and PostgreSQL for full-stack development
• Proven expertise in AI/ML model design, training, optimization, and deployment at scale
• Proven solid background in building agentic and multi-agentic solutions for complex workflows
• Demonstrated ability to lead technical teams, provide architectural guidance, and mentor junior engineers
• Proven excellent problem-solving, communication, and collaboration skills for global team environments

Preferred Qualifications:

• AI Dojo Certification or equivalent advanced AI training
• Experience in healthcare or regulated environments and familiarity with AI observability tools like Arize AX

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.