We are seeking a talented and passionate Lead Frontend Developer with deep expertise in ReactJS to spearhead the development of our cutting-edge user interfaces. The ideal candidate will be a technical leader, responsible for guiding the frontend team, defining architectural patterns, and ensuring the delivery of high-quality, performant, and intuitive web applications. This role requires a strong command of modern JavaScript, React ecosystem, and a commitment to best practices in UI/UX development. **Key Responsibilities** + Lead the design, development, and implementation of complex, scalable, and responsive web applications using ReactJS and its ecosystem. + Define and enforce frontend architectural patterns, coding standards, and best practices to ensure consistency, maintainability, and performance across all frontend projects. + Provide technical leadership, mentorship, and guidance to a team of frontend developers, fostering their growth and ensuring high-quality code delivery. + Collaborate closely with UX/UI designers, product managers, and backend engineers to translate wireframes and designs into pixel-perfect, highly functional user interfaces. + Oversee and conduct thorough code reviews, ensuring adherence to quality, performance, security, and accessibility standards. + Optimize application performance, identify and resolve frontend bottlenecks, and improve overall user experience. + Drive the adoption of new technologies, tools, and methodologies to enhance our frontend development capabilities. + Stay up-to-date with the latest trends and advancements in frontend development, ReactJS, and web technologies. **Required Qualifications** + Bachelor's or Master's degree in Computer Science, Software Engineering, or a related technical field. + Professional experience in frontend web development, with at least 3 years in a lead or senior role focused on ReactJS. + Expert-level proficiency in ReactJS, including a deep understanding of its core principles, component lifecycle, hooks, and state management libraries (e.g., Redux, Context API, Zustand). + Strong command of modern JavaScript (ES6+), HTML5, and CSS3, with experience in pre-processors (e.g., SASS, LESS) and styled-components or CSS-in-JS solutions. + Demonstrable experience with frontend build tools (e.g., Webpack, Vite, Babel) and package managers (npm, yarn). + Proficiency in writing unit, integration, and end-to-end tests for frontend applications (e.g., Jest, React Testing Library, Cypress). + Solid understanding of responsive design principles and cross-browser compatibility issues. + Experience with version control systems, particularly Git. + Excellent problem-solving skills, strong analytical capabilities, and clear communication skills (verbal and written). **Preferred Qualifications** + Experience with other JavaScript frameworks or libraries (e.g., Angular, Vue.js). + Familiarity with server-side rendering (SSR) frameworks like Next.js or Remix. + Experience with GraphQL APIs. + Knowledge of accessibility standards (WCAG) and implementing accessible user interfaces. + Understanding of CI/CD pipelines and deployment processes for frontend applications. + Experience with cloud platforms (e.g., AWS, Azure, GCP). + Familiarity with UI component libraries and design systems (e.g., Material-UI, Ant Design, Storybook). ------------------------------------------------------ **Job Family Group:** Technology ------------------------------------------------------ **Job Family:** Applications Development ------------------------------------------------------ **Time Type:** Full time ------------------------------------------------------ **Most Relevant Skills** Please see the requirements listed above. ------------------------------------------------------ **Other Relevant Skills** For complementary skills, please see above and/or contact the recruiter. ------------------------------------------------------ _Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law._ _If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review_ _Accessibility at Citi (https://www.citigroup.com/citi/accessibility/application-accessibility.htm)_ _._ _View Citi’s_ _EEO Policy Statement (https://www.citigroup.com/global/eeo-aa-policy)_ _and the_ _Know Your Rights (https://www.eeoc.gov/sites/default/files/2023-06/22-088\_EEOC\_KnowYourRights6.12ScreenRdr.pdf)_ _poster._ Citi is an equal opportunity and affirmative action employer. Minority/Female/Veteran/Individuals with Disabilities/Sexual Orientation/Gender Identity.