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 diversity and inclusion, talented peers, comprehensive benefits, and career development opportunities. Come make an impact on the communities we serve as you help us advance health equity on a global scale. Join us to start Caring. Connecting. Growing together.  Optum AI is chartered to drive value on high impact enterprise AI problems, democratize AI through the enterprise ML platform, accelerate the adoption of Generative Artificial Intelligence (Gen AI) and drive Responsible AI. Projecting to deliver $8.4B of benefit value over the next 5 years through these efforts as well as reduce risk through safe, accurate, and unbiased AI, this is a key focus of the enterprise.   As an individual contributor, the Senior AI/ML Engineer, you will contribute to driving the research and development of innovative techniques to enhance the performance of NLP, NLU and NLG technologies as well as LLMs. Additionally, you will develop AI/ML metrics to measure Responsible Use AI (RUAI) dimensions in Gen AI architectures, LLMs and traditional ML models.   You’ll enjoy the flexibility to work remotely * from anywhere within the U.S. as you take on some tough challenges.  Primary Responsibilities: 

• Developing and implementing models and methods that extend and improve LLM capabilities and reliability
• Research, design and implement scalable machine learning models and RAG architectures 
• Developing new solutions and science best practices in Responsible AI
• Developing our research and innovation agenda
• Defining the strategies, priorities, and metrics for technical progress in RAG and LLMs 
• Collaborating with the Optum AI team and fellow scientist and engineers
• Driving adoption of new science and best practices among service teams

You’ll be rewarded and recognized for your performance in an environment that will challenge you and give you clear direction on what it takes to succeed in your role as well as provide development for other roles you may be interested in.  Required Qualifications:

• Master degree in computer science, Machine Learning, statistics, engineering, mathematics, or another STEM discipline 
• 5+ years of experience using ML to solve problems in natural language processing (NLP), computer vision (CV), computer speech (ASR), and/or other AI domains 
• 3+ years of DL frameworks such as PyTorch and/or TensorFlow 
• 3+ years of developing machine learning applications
• 3+ years of experience in developing Responsible AI metrics, best practices, and/or solutions 
• 3+ years of solid ML and RL research and development experience 

Preferred Qualifications: 

• Ph.D. in Machine Learning with focus on NLP and/or GenAI 
• Experience with Advanced Deep Learning, applied math and statistics
• Experience fine-tuning LLMs and/or improving pre-train LLM’s performance 
• Solid technical and scientific knowledge about generative AI

*All employees working remotely will be required to adhere to UnitedHealth Group’s Telecommuter Policy  California, Colorado, Connecticut, Hawaii, Nevada, New Jersey, New York, Rhode Island, or Washington Residents Only: The salary range for this role is $88,000 to $173,200 annually. Pay is based on several factors including but not limited to local labor markets, education, work experience, certifications, etc. UnitedHealth Group complies with all minimum wage laws as applicable. In addition to your salary, UnitedHealth Group offers benefits such as, a comprehensive benefits package, incentive and recognition programs, equity stock purchase and 401k contribution (all benefits are subject to eligibility requirements). No matter where or when you begin a career with UnitedHealth Group, you’ll find a far-reaching choice of benefits and incentives.   Application Deadline: This will be posted for a minimum of 2 business days or until a sufficient candidate pool has been collected. Job posting may come down early due to volume of applicants. 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.    Diversity creates a healthier atmosphere: UnitedHealth Group is an Equal Employment Opportunity/Affirmative Action employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, age, national origin, protected veteran status, disability status, sexual orientation, gender identity or expression, marital status, genetic information, or any other characteristic protected by law.  UnitedHealth Group is a drug - free workplace. Candidates are required to pass a drug test before beginning employment.