**Company description** Publicis Sapient is a digital transformation partner helping established organizations get to their future, digitally enabled state, both in the way they work and the way they serve their customers. We help unlock value through a start-up mindset and modern methods, fusing strategy, consulting, and customer experience with agile engineering and problem-solving creativity. United by our core values and our purpose of helping people thrive in the brave pursuit of next, our 20,000+ people in 53 offices around the world combine experience across technology, data sciences, consulting, and customer obsession to accelerate our clients’ businesses through designing the products and services their customers truly value. **Overview** Are you driven by the challenge of creating seamless, high-impact digital experiences? Join our team as a Senior Frontend Developer and play a key role in building intuitive, scalable solutions that users love. Here, you'll collaborate with passionate professionals, bring innovative ideas to life, and contribute to projects that truly make a difference. **Responsibilities** + Develop and maintain high-quality web applications using React.js. + Collaborate with cross-functional teams to define, design, and ship new features. + Optimize applications for maximum speed and scalability. + Write clean, maintainable, and efficient code. + Ensure the technical feasibility of UI/UX designs. + Conduct code reviews and mentor junior developers. + Stay up-to-date with the latest industry trends and technologies. **Qualifications** + Bachelor's degree in Computer Science, Engineering, or a related field. + 5+ years of experience in frontend development. + Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model. + Thorough understanding of React.js and its core principles. + Experience with popular React.js workflows (such as Flux or Redux). + Familiarity with RESTful APIs. + Knowledge of modern authorization mechanisms, such as JSON Web Token. + Experience with common frontend development tools such as Babel, Webpack, NPM, etc. + Ability to understand business requirements and translate them into technical requirements. + Strong problem-solving skills and attention to detail. + Excellent communication and teamwork skills. Preferred Qualifications: + Experience with TypeScript. + Familiarity with code versioning tools such as Git. + Knowledge of modern CSS frameworks (e.g., Tailwind CSS, Bootstrap). + Experience with testing frameworks like Jest or Mocha Preferred Locations: This position is ONLY available for candidates based in Mexico, Colombia and Costa Rica.