Sr Software Engineer(UI)

About the role

The UI Software Engineer at Optum works on designing, building, and refining user-facing features that make applications intuitive, responsive, and visually consistent. They translate product requirements and design mockups into clean, maintainable code using front-end technologies, collaborate with designers, product managers, and backend engineers to ensure seamless interactions and data flow.

Responsibilities

• Build accessible, reusable UI components in React 19 with TypeScript 5, following industry best practices.
• Translate dynamic mockups into production-ready components and pages, ensuring WCAG AA compliance, keyboard accessibility, and semantic HTML.
• Implement application flows using React Router 7 and state management with Redux Toolkit and React Redux.
• Maintain and evolve our SCSS-based design system; document and showcase components in Storybook 8.
• Optimize rendering, bundle size, and runtime performance using memoization, hooks, and Nx workspace tooling.
• Write and maintain unit and integration tests using Jest 29 and Testing Library; contribute to E2E coverage with Playwright.
• Collaborate with shared libraries, strict typing, and CI pipelines; follow code review and git workflows.
• Contribute to internationalization and runtime translation patterns and ensure robust error handling and analytics instrumentation where needed.
• Participate in Agile ceremonies; partner with design and product to plan features, refine requirements, and evaluate technical trade-offs.
• Create reusable components and hooks that reduce duplication and accelerate feature delivery.
• Write maintainable code that fits industry standards: typed, readable, and well-tested.
• Contribute measurable improvements in performance, reliability, and developer experience across our codebase.
• Design, develop, and deploy AI-powered solutions to address complex business challenges with emphasis on responsible use of AI.

Requirements

• Undergraduate degree or equivalent experience.
• 5+ years proven front-end experience building scalable React applications and component libraries.
• 3+ years of hands-on experience with TypeScript 5 (typing props, generics, utility types, type guards) and modern React patterns (hooks, memoization, context when appropriate).
• 2+ years of experience with Redux Toolkit and React Redux; comfortable designing slices/selectors and handling async flows.
• 2+ years of experience with React Router (v7) for routing, guarded flows, and navigation patterns.
• 2+ years of experience with SCSS for styling (variables, mixins, responsive layouts), with a focus on maintainable, mobile-first design.
• 2+ years of experience maintaining a living design system and documenting components in Storybook 8.
• 2+ years of experience with Jest 29 and Testing Library for unit/integration tests; Playwright for E2E; familiarity with mock strategies and test isolation.

Qualifications

• Experience with analytics instrumentation, internationalization, and performance profiling.
• Familiarity with Nx monorepos, modular libraries, and performance optimization within large codebases.
• Strong understanding of web accessibility (WCAG AA), semantic HTML, and keyboard navigation.
• Comfort with build tools, CI/CD, and version control (Git), plus Agile collaboration.
• Excellent communication skills, attention to detail, and a collaborative mindset.

Benefits

We offer a comprehensive benefits package, incentive and recognition programs, equity stock purchase, and a 401(k) contribution. Telecommuters must adhere to our Telecommuter Policy. Salary ranges from $91,700 to $163,700 annually based on full-time employment. We comply with all minimum wage laws as applicable. UnitedHealth Group is an Equal Opportunity employer under applicable law and qualified candidates will receive consideration for employment without regard to race, national origin, religion, age, color, sex, sexual orientation, gender identity, disability, or protected veteran status, or any other characteristic protected by local, state, or federal laws, rules, or regulations. UnitedHealth Group is a drug-free workplace. Candidates are required to pass a drug test before beginning employment.