As a Lead II Software Engineer at UST, you will leverage expertise in React, React Native, JavaScript, TypeScript, Redux, and ContextAPI for frontend development, along with Java Spring Boot for backend services. Your primary focus will be on developing robust user interfaces using state management patterns like Flux or Redux, ensuring components and the overall application are maintainable and high-quality. You will create new user-facing features with React, Jest, TypeScript, HTML, and CSS, and build reusable front-end libraries. Collaboration with teams across infrastructure layers is essential, requiring strong problem-solving skills and sophisticated design sensibilities. A commitment to delivering quality products and thriving in a fast-paced, innovative environment is crucial for success in this role.