Summary: The Sr Developer – Front End builds and enhances modern web user interfaces using React.js, focusing on high-quality UI features, integration, performance, and stability. Highlights: 1. Be part of one of the largest companies in the digital sector worldwide 2. Promote an inclusive culture, valuing diverse perspectives 3. Improve your career in a fast-growing IT services provider 00068075411 * Date published **Mar 30 2026** * Location **MexicoCy,CD\-Plaza Polanco** **/** **Mexico** * Job category **Technology \& Engineering** * Work model **Hybrid** At Cognizant we have an ideal opportunity for you to be part of one of the largest companies in the digital sector worldwide. A Great Place To Work where we look for people who contribute new ideas, experiencing a dynamic and growing environment. At Cognizant we promote an inclusive culture, where we value different perspectives providing career growth and development opportunities. \#WelcomeToCognizant! The Sr Developer – Front End is a hands\-on engineer responsible for building and enhancing modern web user interfaces using React.js, JavaScript, HTML5, and CSS3\. This role focuses on delivering high\-quality UI features and extensions, maintaining UI/UX consistency, integrating with backend services, and ensuring performance and stability for business\-critical retail or store\-facing applications. **Requirements:** 4\-6 years of experience as Frontend Developer React.js (components, basic state handling, routing fundamentals) JavaScript (ES6\+) / TypeScript (basic to intermediate) HTML5 (semantic markup) CSS3 (Flexbox/Grid, responsive design) UI libraries (Bootstrap / Tailwind / Material UI) ADVANCED ENGLISH IS A MUST Hybrid role in CDMX **Key Responsibilities:** Build and maintain responsive UI screens and reusable components using React.js, HTML5, and CSS3, based on provided wireframes and UI/UX guidelines. Implement UI enhancements and extensions following established component patterns, naming conventions, and coding standards. Integrate front\-end screens with backend services by consuming REST APIs and handling common UI data flows (loading, success, error states). Assist with debugging and defect fixing using browser developer tools and logs; support SIT/UAT cycles by reproducing issues and validating fixes. Participate in Agile ceremonies, collaborate with designers, backend engineers, and QA, and contribute to documentation, unit tests, and code reviews. Why Cognizant? Improve your career in one of the largest and fastest growing IT services providers worldwide Receive ongoing support and funding with training and development plans Have a highly competitive benefits and salary package Get the opportunity to work for leading global companies We are committed to respecting human rights and build a better future by helping your minds and the environment We invest in people and their wellbeing. We create conditions for everyone to thrive. We do not discriminate based on race, religion, color, sex, age, disability, nationality, sexual orientation, gender identity or expression, or for any other reason covered. At Cognizant we believe than our culture make us stronger! Join us now! **The Cognizant community:** We are a high caliber team who appreciate and support one another. Our people uphold an energetic, collaborative and inclusive workplace where everyone can thrive. * Cognizant is a global community with more than 300,000 associates around the world. * We don’t just dream of a better way – we make it happen. * We take care of our people, clients, company, communities and climate by doing what’s right. * We foster an innovative environment where you can build the career path that’s right for you. **About us:** Cognizant is one of the world's leading professional services companies, transforming clients' business, operating, and technology models for the digital era. Our unique industry\-based, consultative approach helps clients envision, build, and run more innovative and efficient businesses. Headquartered in the U.S., Cognizant (a member of the NASDAQ\-100 and one of Forbes World’s Best Employers 2025\) is consistently listed among the most admired companies in the world. Learn how Cognizant helps clients lead with digital at www.cognizant.com Cognizant is an equal opportunity employer. Your application and candidacy will not be considered based on race, color, sex, religion, creed, sexual orientation, gender identity, national origin, disability, genetic information, pregnancy, veteran status or any other characteristic protected by federal, state or local laws. If you have a disability that requires reasonable accommodation to search for a job opening or submit an application, please email CareersNA2@cognizant.com with your request and contact information. *Disclaimer:* *Compensation information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.* *Applicants may be required to attend interviews in person or by video conference. In addition, candidates may be required to present their current state or government issued ID during each interview.* d