Senior Full Stack Engineer - Java

Requisition Number: 2385459
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 an experienced Full Stack Java Developer to design, develop, and maintain scalable web applications using Java/Spring Boot on the backend and React.js on the frontend. The ideal candidate is comfortable working across the entire stack, from building RESTful APIs and data models to creating responsive, user-friendly UI components, and can collaborate effectively with cross-functional teams to deliver high-quality software. Resource should be AI builder and should be having good knowledge of AI building tools like codex copilot GPT and other Azure AI services to automate and improve the existing process.
Primary Responsibilities:

• Design, develop, and maintain web applications using Java, Spring Boot, and React.js
• Build and consume RESTful APIs / microservices, ensuring performance, security, and scalability
• Develop responsive and reusable UI components using React, Redux/Context API, HTML5, CSS3, and JavaScript/TypeScript
• Design and optimize relational/NoSQL database schemas (e.g., MySQL, PostgreSQL, MongoDB) and write efficient queries
• Integrate frontend applications with backend services and third-party APIs
• Write unit, integration, and end-to-end tests (JUnit, Mockito, Jest, React Testing Library) to ensure code quality
• Participate in code reviews, follow coding standards, and maintain clean, well-documented code
• Troubleshoot, debug, and resolve production issues across the stack
• Collaborate with product managers, UI/UX designers, QA, and DevOps teams throughout the SDLC
• Participate in Agile/Scrum ceremonies (sprint planning, stand-ups, retrospectives)
• Implement CI/CD pipelines and support containerized deployments (Docker, Kubernetes)
• Ensure application security best practices (authentication, authorization, input validation, OWASP guidelines)
• Monitor application performance and optimize for scalability and reliability
• Stay current with emerging technologies and recommend improvements to architecture and tooling
• 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 related field (or equivalent experience)
• Solid hands-on experience with Java (8/11/17) and Spring Framework / Spring Boot (Spring MVC, Spring Data JPA, Spring Security)
• Experience with unit/integration testing frameworks (JUnit, Mockito, Jest, Cypress/Selenium)
• Knowledge of containerization and CI/CD tools (Docker, Kubernetes, Jenkins, GitHub Actions)
• Solid understanding of relational databases
• Familiarity with build tools (Maven/Gradle, npm/yarn) and version control (Git)
• Proficiency in React.js, including Hooks, component lifecycle, state management (Redux/Context API), and modern JavaScript (ES6+)/TypeScript
• Familiarity with cloud platforms (AWS, Azure, or GCP) is a plus.
  Strong problem-solving skills, attention to detail, and ability to work both independently and in a team
• Proven good communication skills and experience working in Agile/Scrum environments

Preferred Qualifications:

• Experience building and consuming RESTful APIs; familiarity with GraphQL
• (MySQL/PostgreSQL/Oracle) and SQL; experience with NoSQL databases
• Experience with Next.js or server-side rendering
• Experience mentoring junior developers
• Knowledge of application monitoring tools (Prometheus, Grafana, ELK stack, New Relic)
• Understanding of microservices architecture, message queues (Kafka/RabbitMQ), and API gateways
• Proven exposure to serverless architecture

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.