Sr Software Engineer(UI)

Requisition Number: 2357444
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 diversity and inclusion, talented peers, comprehensive benefits and career development opportunities. Come makes an impact on the communities we serve as you help us advance health equity on a global scale. Join us to start Caring. Connecting. Growing together.
A UI Software Engineer at Optum spends each day designing, building, and refining user-facing features that make applications intuitive, responsive, and visually consistent. Their work typically involves translating product requirements and design mockups into clean, maintainable code using front-end technologies, collaborating closely with designers, product managers, and backend engineers at Optum to ensure seamless interactions and data flow. Day-to-day tasks include implementing new UI components, fixing visual or usability bugs, optimizing performance and accessibility, and reviewing code to maintain quality standards. They work closely with Quality Engineers to help update or generate automated tests; they test their work across browsers and devices, incorporate user feedback, and continuously improve the interface to deliver a polished and engaging user experience.
Primary 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.
• Write high-quality, accessible UI shipped with strong test coverage and documented in Storybook.
• Create reusable components and hooks that reduce duplication and accelerate feature delivery.
• Wrote 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

You'll be rewarded and recognized for your performance in an environment that will challenge you and give you clear directions on what it takes to succeed in your role as well as provide development for other roles you may be interested in.
Required Qualifications

• 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.

Preferred 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.

*All Telecommuters will be required to adhere to UnitedHealth Group's Telecommuter Policy.
Pay is based on several factors including but not limited to local labor markets, education, work experience, certifications, etc. In addition to your salary, we offer benefits such as, a comprehensive benefits package, incentive and recognition programs, equity stock purchase and 401k contribution (all benefits are subject to eligibility requirements). No matter where or when you begin a career with us, you'll find a far-reaching choice of benefits and incentives. The salary for this role will range from $91,700 to $163,700 annually based on full-time employment. We comply with all minimum wage laws as applicable.
Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.
Application Deadline: This will be posted for a minimum of 2 business days or until a sufficient candidate pool has been collected. Job posting may come down early due to volume of applicants.
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.
UnitedHealth Group is an Equal Employment Opportunity employer under applicable law and qualified applicants 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.
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