Lead AI/ML Engineer - Remote
Location: San Diego, California, US
Recruiter: UnitedHealth Group
Date posted: Friday, November 7, 2025
Job Description:
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 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.
Lead the autonomous medical coding enablement in a SaaS platform by integrating machine learning and LLMs. Working closely with data scientists and software engineers through data extraction, research, training, and deployment to create a scalable production solution that can handle millions of medical charts daily. You will be responsible for architecture decisions, code reviews, and coordinating across teams. You will work with cutting edge models, LLM, software, and tools in a fast paced environment.
You'll enjoy the flexibility to work remotely* from anywhere within the U.S. as you take on some tough challenges. For all hires in the Minneapolis or Washington, D.C. area, you will be required to work in the office a minimum of four days per week.
Primary Responsibilities:
Lead end-to-end ML projects: problem definition, data strategy, feature engineering, modeling, evaluation, deployment, and monitoringArchitect scalable training and inference systems with solid SLAs, observability, and cost controlsEstablish experimentation rigor: offline evaluation, A/B testing, guardrails, power analysis, and causal insightsDrive MLOps excellence: CI/CD for ML, reproducible pipelines, model registry and governance, automated retraining, drift/quality monitoringCollaborate with product and design to translate ambiguous goals into measurable ML problems; define success metrics and attributionMentor and unblock engineers; conduct design and code reviews; set patterns for reliability, documentation, and testingPartner with data engineering on feature pipelines, data contracts, and online/offline parity; champion data qualityCommunicate tradeoffs and results to technical and non-technical stakeholders; influence roadmap and prioritizationOptional focus areas depending on interest and business needs: LLM applications (RAG, fine-tuning, evaluation/guardrails), recommendations/ranking, anomaly detection, forecastingDesign, develop, and deploy AI-powered solutions using no-code, low-code, and advanced platforms, translating business needs into scalable applications that enhance products, workflows and decision-makingYou'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:
BS/MS/PhD in Computer Science, Engineering, Statistics, or related field, or 4+ years of equivalent practical experience7+ years building and operating ML systems in production with a track record of shipped impact5+ years experience in Azure
Preferred Qualifications:
Domain experience in recommendations/ranking, time-series forecasting, anomaly detection, optimization, or reinforcement learningSolid software engineering fundamentals: production-grade C#/Python, testing, performance profiling, and code reviewsSolid ML/statistics: supervised learning, feature engineering, evaluation methodology, bias/variance; deep learning and/or gradient boosting
Privacy, security, and responsible AI practices (GDPR/CCPA, PII handling, fairness)Excellent communication and product sense; able to scope ambiguous problems and align stakeholdersOpen-source contributions, publications, or patents; prior experience mentoring or tech leading small teamsData engineering for ML: ETL/ELT, SQL, distributed processing (e.g., Spark), and feature pipelinesLLMOps: prompt engineering, retrieval-augmented generation, fine-tuning, evaluation, and safety/guardrailsMLOps expertise: CI/CD for ML, containers, Kubernetes/serverless inference, model registries, reproducibility, and model monitoringExperimentation: A/B testing design/analysis, guardrail metrics, basic causal inference*All employees working remotely will be required to adhere to UnitedHealth Group's Telecommuter Policy.
Pay is based on several factors including but not limited to local labor markets, education, work experience, certifications, etc. In addition to your salary, we offer benefits such as, a comprehensive benefits package, incentive and recognition programs, equity stock purchase and k contribution (all benefits are subject to eligibility requirements). No matter where or when you begin a career with us, you'll find a far-reaching choice of benefits and incentives. The salary for this role will range from $, to $, annually based on full-time employment. We comply with all minimum wage laws as applicable.
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.
UnitedHealth Group is an Equal Employment Opportunity employer under applicable law and qualified applicants will receive consideration for employment without regard to race, national origin, religion, age, color, sex, sexual orientation, gender identity, disability, or protected veteran status, or any other characteristic protected by local, state, or federal laws, rules, or regulations.
UnitedHealth Group is a drug - free workplace. Candidates are required to pass a drug test before beginning employment.
Apply for this job on UnitedHealth Group
