Senior Front-End Engineer (Contract - Longtime) @ Uplers

We are looking for a skilled Senior Front-End Engineer with 5 to 10 years of experience to lead the development of next-generation e-commerce solutions, including high-performance web applications, Progressive Web Apps (PWA), and hybrid mobile experiences. This role is based in Kolkata.

• Collaborate with cross-functional teams to align technical work with client expectations.
• Lead end-to-end development of large-scale projects, including full-site rebuilds and feature enhancements.
• Design and implement scalable front-end solutions aligned with business goals.
• Write clean, reusable code focusing on performance, testing, and maintainability.
• Optimize applications for speed, scalability, and Core Web Vitals.
• Mentor junior engineers and contribute to architectural discussions around state management, caching, and deployment.

• Strong communication skills in English (written and verbal).
• Ability to collaborate effectively with global teams and explain technical concepts to non-technical stakeholders.
• 5+ years of front-end development experience, including at least 2 years in a senior role.
• Expertise in React 17+, Next.js, and modern JavaScript/TypeScript.
• Proficiency in REST API integration and performance optimization (CDNs, caching, code splitting).
• Strong knowledge of CSS preprocessors (SASS, LESS) and responsive/mobile-first design.
• Experience with server-side rendering, static site generation, and build tooling (Webpack, Babel).
• Familiarity with CI/CD pipelines, cloud platforms (AWS, Vercel), and testing frameworks.
• Solid understanding of e-commerce concepts and analytics tools (Google Analytics, GTM).