Senior Software Engineer I- JAVA+, React/Angular and LLM

Requisition Number: 2369808
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:

• Develop scalable backend services using Python/FastAPI
• Build responsive frontend applications using React
• Work closely with Architects, Product Teams, and Platform Engineers
• Ensure scalability, reliability, and security of applications
• Fine-Tuning Concepts, Tool Calling & Function Calling
• Passion for Generative AI and autonomous agent systems
• Automation-first problem solving approach
• Actively explores and adopts new tools and open to work on new areas
• Uses AI as a force to multiply your productivity, not just an assistant in SDLC
• 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:

• B.E / MCA / B.Tech / MTECH /MS Graduation
• 6+ years of experience in Core Application Engineering - Java, Python or Mainframe Tech stacks
• Hands-on experience in Agentic AI Engineering
• Backend Development: Python, FastAPI / Flask, REST API Development
• Frontend Development: React, TypeScript / JavaScript, CSS
• Experience with: Docker, Kubernetes, CI/CD Pipelines, GitHub / Azure DevOps, Azure Cloud Services
• Database & Infrastructure: PostgreSQL / MongoDB, DB2, Redis, Vector Databases (Chroma DB, Pinecone)
• Experience working in Agile/Scrum environments
• Understanding of: Agentic AI, Multi-Agent Systems, AI Workflows, Agent Orchestration, MCP (Model Context Protocol)
• Good understanding of scalable application architecture
• Understanding of software engineering best practices
• Proven exposure with Integration to enterprise APIs, tools
• Proven ability to independently own engineering deliverables
• Proven ability to quickly learn evolving AI technologies
• Proven solid communication and collaboration skills
• Proven solid problem-solving and debugging skills
• Proven solid tech enthusiast with continuous learning attitude

Preferred Qualifications:

• Development experience in building enterprise-grade Agentic AI applications
• Prompt Engineering, RAG Architecture, AI Observability, AI Testing & Evaluation, LLM
• Proven to perform prompt optimization and model performance tuning
• Proven to build and orchestrate AI agents using LangGraph and LangChain
• Proven multi-agent workflows with planning, memory, and tool integration
• Proven to to implement RAG-based architectures and vector search solutions
• Proven to implement AI observability, tracing, monitoring, and evaluation

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.