Senior Full Stack Engineer - Java, Python, React

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:

• Design, develop, and deliver end to end features across backend services and frontend applications using Java, Python, Spring Boot, and React
• Build scalable backend services and APIs using Java (Spring ecosystem) and Python (FastAPI, Flask, or similar frameworks)
• Develop reusable, responsive, and accessible UI components using React.js and TypeScript
• Design and implement RESTful APIs, microservices, integration layers, and data pipelines
• Deploy, manage, and monitor applications on cloud platforms such as AWS, Azure, GCP, or HCC
• Collaborate with architects, product owners, designers, and engineers to translate business requirements into robust technical solutions
• Ensure high application quality through code reviews, unit/integration testing, and engineering best practices
• Optimize system performance, scalability, reliability, and observability using logging, metrics, and monitoring tools
• Participate in Agile/Scrum ceremonies and actively contribute to continuous improvement initiatives
• Enforce secure coding standards, data protection, and compliance with organizational and cloud security guidelines
• Stay current with modern engineering trends, cloud innovations, and emerging AI/ML capabilities
• Mentor junior engineers and contribute to technical design and architectural discussions
• 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:

• Bachelor's degree in Computer Science, Engineering, or equivalent practical experience
• 5+ years of hands on experience in full stack software development
• Hands-on experience with SQL and NoSQL databases
• Solid experience in building and consuming RESTful APIs
• Practical experience deploying and supporting applications in a cloud environment (AWS / Azure / GCP / HCC)
• Solid understanding of Git, CI/CD pipelines, DevOps practices, and automated testing
• Solid proficiency in core technologies:
  • Java, Spring Boot, Spring ecosystem
  • Python (FastAPI, Flask, Django, or equivalent backend frameworks)
  • React.js, JavaScript, TypeScript
• Proven solid problem solving and troubleshooting skills with the ability to work independently
• Proven excellent communication, collaboration, and stakeholder engagement skills

Preferred Qualifications:

• Hands-on experience or interest in Prompt Engineering and AI powered internal tools or automation
• Experience with Docker, Kubernetes, API Gateways, Kafka, or microservice orchestration
• Experience leading technical initiatives or mentoring junior engineers
• Knowledge of observability tools (Prometheus, Grafana, OpenTelemetry, ELK, etc.)
• Familiarity with cloud native patterns, serverless architectures, or event driven systems
• Exposure to Generative AI, LLM based applications, embeddings, or RAG architectures

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.