Senior Full Stack Engineer

**Requisition number:** 2367379 **Job category:** Technology 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:** + Full Stack Development (Backend) + Develop high-performance applications for AI-assisted workflows and decision systems + Cloud (AWS) + Architect and deploy applications on AWS (Lambda, ECS/EKS, API Gateway, S3, DynamoDB, Aurora, Bedrock/SageMaker) + Design event-driven and microservices architectures for scalable AI workloads + Implement Infrastructure-as-Code (Terraform/CloudFormation) + CI/CD & Engineering Excellence + Build and optimize CI/CD pipelines (GitHub Actions/Azure DevOps/Jenkins) for automated builds, testing, and deployments + Apply MLOps practices including model lifecycle, versioning, and monitoring + Improve performance, reliability, observability, and cost efficiency of AI inference systems + 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 + 6+ years of full stack engineering experience, with solid backend and frontend expertise + Experience integrating AI/ML models into production applications + Proven experience working on AWS cloud platform (compute, storage, networking, IAM, monitoring) + Solid understanding of CI/CD pipelines, DevOps practices, and containerization (Docker/Kubernetes) + Solid programming skills in Python and experience with RESTful API development + Knowledge of Backend: Python (FastAPI/Flask), API design + Knowledge of Cloud: AWS (Lambda, ECS/EKS, API Gateway, S3, DynamoDB) + Knowledge of DevOps: CI/CD, Docker, Kubernetes, Terraform + Knowledge of Data: SQL/NoSQL, vector databases **Preferred Qualifications:** + Hands-on experience with React.js (hooks, state management, component design) + Experience with Agentic AI / Generative AI systems (LLMs, RAG, orchestration frameworks) + Experience in microservices architecture and event-driven systems + Experience in healthcare/claims domain or regulated environments + Familiarity with vector databases (Pinecone, FAISS, OpenSearch) and semantic search + Exposure to MLOps ecosystems (model registry, pipelines, evaluation frameworks) + Healthcare domain exposure: + Experience with healthcare datasets (claims, eligibility, prior authorization, provider directories) + Understanding of clinical or operational workflows (provider calls, documentation, adjudication steps) + Awareness of healthcare data sensitivity and HIPAA like compliance expectations _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._ \#GEN