Senior Software Engineer I

Requisition Number: 2349078
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:

• Lead the modernization and migration of enterprise UI applications from legacy frameworks to modern React and Next.js-based architectures
• Design, develop, test, deploy, and maintain scalable, high-performance frontend applications
• Provide technical leadership and mentorship to engineers across the team
• Drive adoption of modern frontend best practices, including server-side rendering, component reusability, and performance optimization
• Collaborate with product, platform, backend, DevOps, and security teams to deliver end-to-end solutions
• Lead frontend architecture decisions for micro frontend and modular UI platforms
• Design and implement secure authentication and authorization flows in collaboration with platform teams
• Ensure high quality through strong unit testing, end-to-end testing, and code reviews
• Support CI/CD pipelines and promote automation and engineering excellence
• Effectively communicate technical designs and trade-offs to both technical and non-technical stakeholders
• Comply with company policies, procedures, and directives
• 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 or equivalent practical experience
• 6+ years of experience in frontend or full-stack software engineering
• 3+ years of hands-on experience with React
• Solid experience with Next.js, including:
  • Server-side rendering (SSR)
  • API routes
  • Modern routing patterns
• Experience with state management libraries such as:
  • Redux
  • Redux Toolkit
  • Zustand
• Experience building reusable, component-based UI systems using modern CSS frameworks (e.g., Tailwind CSS)
• Hands-on experience integrating UI applications with authentication and authorization mechanisms
• Hands-on experience with frontend testing frameworks:
  • Jest for unit testing
  • Cypress (or equivalent) for end-to-end testing
• Experience using CI/CD pipelines and source control systems (e.g., Git, GitHub)
• Experience working in Agile/Scrum development environments
• Experience working with micro frontend or modular frontend architectures
• Solid understanding of web application security and session management concepts
• Proven leadership, mentoring, and collaboration skills
• Proven solid verbal, written, and interpersonal communication skills
• Proven solid analytical and problem-solving abilities

Preferred Qualifications:

• Experience migrating applications from Angular or other legacy frontend frameworks to React/Next.js
• Experience with micro frontend architectures or module-federation-like patterns
• Experience working in large-scale enterprise environments
• Experience working in healthcare, insurance, or other regulated domains
• Knowledge of accessibility standards (WCAG) and modern UI performance practices
• Familiarity with design systems and component libraries
• Familiarity with cloud-based deployments and frontend performance optimization
• Familiarity with SAFe or large-scale Agile frameworks
• Proven exposure to AI-assisted UI generation tools or design-to-code workflows

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.