Senior AI​/ML Engineer - Remote; Time Zone

Position: Senior AI/ML Engineer - Remote (Central Time Zone)
Optum Tech is a global leader in health care innovation. Our teams develop cutting-edge solutions that help people live healthier lives and help make the health system work better for everyone. From advanced data analytics and AI to cybersecurity, we use innovative approaches to solve some of health care's most complex challenges. Your contributions here have the potential to change lives.

Ready to build the next breakthrough? Join us to start Caring. Connecting. Growing together.

You'll enjoy the flexibility to work remotely
* from anywhere within the U.S. as you take on some tough challenges.

Primary responsibilities:

* Design, develop, and deploy production agentic AI systems using OpenAI Agents SDK, Claude Agents SDK, or similar frameworks to power conversational healthcare experiences

* Build and maintain multi-agent orchestration systems that route user requests across specialized Line-of-Business AI agents using Agent-to-Agent (A2A) protocols

* Develop FastAPI backends and Node.js/Type Script services that integrate LLMs (AWS Bedrock, Vertex AI) with healthcare systems through GraphQL APIs and AWS App Sync

* Implement healthcare-specific guardrails including PII detection/scrubbing, prompt safety, and compliance controls for patient-facing applications

* Deploy containerized AI/ML workloads to AWS (App Runner, ECS, Lambda) with infrastructure-as-code using Terraform and CI/CD pipelines (Git Hub Actions)

* Collaborate with product and clinical stakeholders to design, evaluate, and optimize agentic AI workflows using quantitative metrics and user feedback

* Monitor LLM application performance, token usage, latency, and user satisfaction in production environments serving millions of health plan members

* Stay current with emerging patterns in generative AI, agent frameworks, and responsible AI practices for healthcare applications

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:

* Bachelor's degree in Computer Science, Data Science, or related field

* 4+ years of hands-on experience with Python or Type Script or other relevant backend languages such as Java, Node.js

* Experience building RESTful or GraphQL APIs in production environments

* Understanding of LLM fundamentals (prompting, context management, or model integration)

* Must be authorized to work in the United States without the need for current or future employer-sponsored visa sponsorship (e.g., H-1B, TN, F-1/OPT, CPT, or other employment-based visa status)

Preferred Qualifications:

* Production experience with agentic AI frameworks (OpenAI Agents SDK, Claude Agents SDK, Lang Graph, or similar)

* Hands-on experience with AWS Bedrock, Vertex AI, or Azure OpenAI services

* Experience measuring and improving LLM applications using evaluation frameworks, prompt iteration, or user feedback loops

* Infrastructure-as-code experience with Terraform or Cloud Formation

* Experience with AWS services (Lambda, ECS, App Runner, App Sync, DynamoDB)

* Healthcare applications, HIPAA compliance, or experience in regulated industries

* Multi-agent systems, agent orchestration, or workflow engines

* FastAPI, Express, or similar backend framework experience

* All employees working remotely will be required to adhere to United Health 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 401k 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 $91,700 to $163,700 annually based on full-time employment. We comply with all minimum wage laws as applicable.

Final date to receive applications:
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 United Health 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.

United Health Group is an Equal Employment…