Sr Full Stack Engineer - Python, Node, React, Typescript, GenAI

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. We are looking for a highly skilled Senior Full Stack Engineer to design, build, and scale modern, AI-powered digital products and rich data-driven experiences. The ideal candidate will have deep expertise in React, TypeScript, and Node.js, with a passion for creating intuitive dashboards, analytics platforms, and enterprise-grade web applications.

This role combines solid full-stack engineering capabilities with practical experience in Python and Generative AI technologies, enabling the development of intelligent applications, AI assistants, agent-based workflows, and advanced user experiences. You will work closely with product, AI/ML, design, and platform teams to deliver scalable, secure, and resilient solutions that drive business outcomes.

Primary Responsibilities

• Design and develop modern, responsive, and highly interactive web applications using React, TypeScript, and Node.js
• Build rich dashboards, analytics portals, data visualization experiences, and executive reporting solutions that deliver actionable insights
• Develop scalable backend services, APIs, and microservices that power web, mobile, and AI-driven experiences
• Design reusable and channel-agnostic APIs that support multiple consumer applications and intelligent agent experiences
• Build and integrate Generative AI solutions, including:
• Retrieval-Augmented Generation (RAG) applications
• Prompt engineering and tool-calling capabilities
• Develop Python-based services and AI orchestration layers supporting machine learning and LLM-powered applications
• Create intuitive user experiences that simplify complex business processes and workflows
• Implement observability, monitoring, analytics, and usage dashboards to measure application and AI system performance
• Drive engineering excellence through automated testing, code reviews, CI/CD pipelines, and modern DevOps practices
• Collaborate with architects, AI/ML engineers, product managers, UX designers, and platform teams to deliver secure and scalable solutions
• Evaluate emerging technologies, frameworks, and AI capabilities to continuously improve engineering effectiveness and product innovation
• Ensure compliance with organizational security, governance, and responsible AI standards
• Comply with all applicable Company policies, procedures, and business directives, changes including those relating to work location, team assignments, work schedules, and flexible work arrangements

Required Qualifications

• Bachelor's degree in Computer Science, Engineering, or related field, or equivalent practical experience

• 6+ years of professional software engineering experience in full-stack application development

• Hands-on experience building and deploying Generative AI applications using modern LLM platforms and frameworks

• Experience with:

• AI agents and agent orchestration

• RAG architectures

• Vector search and embeddings

• Prompt engineering

• Tool/function calling

• Experience designing and developing RESTful APIs and microservices architectures

• Experience deploying applications in cloud environments such as AWS, Azure, or GCP

• Experience implementing automated testing strategies and maintaining high-quality engineering standards

• AI-powered search and recommendation experiences

• Proven experience building enterprise-grade dashboards, data visualizations, and analytics applications

• Solid expertise in:

• React.js

• TypeScript

• JavaScript

• Node.js

• HTML5/CSS3

• Knowledge of AI assistants and copilots

• Knowledge of Agentic workflows

• Solid understanding of CI/CD, containerization, DevOps, and modern software delivery practices

• Solid proficiency in Python for backend services, automation, AI integration, or data processing workloads

• Proven ability to own and deliver solutions end-to-end, from architecture and design through deployment and support

Preferred Qualifications

• B.E or B.Tech in computer science or information technology or equivalent
• Experience building enterprise AI platforms, copilots, intelligent assistants, or conversational applications
• Experience with advanced data visualization frameworks such as D3.js, Recharts, Highcharts, or similar technologies
• Experience integrating applications with enterprise collaboration and productivity tools
• Experience working in Agile product teams and leading technical initiatives
• Healthcare, health-tech, or regulated industry experience
• Solid understanding of cloud-native architectures and distributed systems
• Familiarity with AI evaluation frameworks, model observability, and AI governance practices
• Exposure to AI coding assistants and modern AI-powered development workflows
• Demonstrated solid problem-solving skills with the ability to translate complex business challenges into elegant technical solutions
• Demonstrated ability to mentor engineers and influence technical direction across teams

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. #Nic