Mantra Consultancy Services requires a React.js Developer or Senior Developer with over five years of experience in Bangalore. Essential skills include React.js, Next.js, Redux, JavaScript, and TypeScript, plus expertise in HTML5, CSS3, and preprocessors like SASS or LESS. Proficiency with build tools such as Webpack, Gulp, or Rollup is necessary, along with exposure to CI/CD pipelines and DevOps practices. You must also excel in web performance optimization. Responsibilities encompass developing scalable, responsive web applications, constructing reusable frontend components, improving application efficiency, collaborating with product, UX, and engineering teams, and participating in deployment and production support. eCommerce domain experience is advantageous. Immediate availability for a face-to-face interview in Bangalore is preferred. The annual salary is between ₹800,000 and ₹1,493,432, with benefits like health insurance and provident fund.