Senior Software Engineer Lead - AI Engineer , Python, LLM, RAG

Caring. Connecting. Growing Together.

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.

Primary Responsibilities:

• Help design and develop the next generation of NLP, ML & AI products, and services for healthcare
• Run large complex proof-of-concepts for the healthcare business
• Manage prioritization and technology work for building NLP, ML & AI solutions
• Work with a great deal of autonomy to find solutions to complex problems
• 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:

• Graduate degree or equivalent experience
• 5+ years of experience in delivering AI/ML projects in a production environment, preferably consumer-facing and high-traffic systems
• 5+ years of client-side application development, with a solid track record of building scalable and performant user-facing applications
• 5+ years of hands-on coding experience in JavaScript or Python-must be comfortable writing production-quality code
• 3+ years of hands-on development experience with Large Language Models (LLMs), including prompt engineering, fine-tuning, or custom LLM orchestration
• 2+ years of experience working with agentic AI architectures, including task decomposition, memory management, and autonomous agent workflows
• Experience in deploying scalable solutions to complex problems, from defining the problem, implementing the solution, and launching the new product successfully
• Proven exposure in RAG, LangChain, VectorDBs
• Proven ability to Quantize, Optimize GenAI models
• Proven skills in the following:
• Models: GPT, Llama, Mistral
• Model Optimization
• Retrieval & Ranking, RAG, RAGAS

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.