We are seeking a highly capable Lead JavaScript Developer with a passion for building rich, responsive web and hybrid-mobile applications. In this role, you will leverage your expertise in JavaScript/TypeScript, React, and Next.js to deliver fast, SEO-friendly, and mobile-first user interfaces.

You will focus on crafting exceptional web experiences that look and feel like native mobile apps, optimizing performance for both desktop and mobile web view browsers (including iOS Safari). Working closely with backend engineers, UX designers, and product owners, you will translate interactive designs into clean, modular, and reusable front-end code.

Responsibilities
- Architect and develop fast, responsive web applications with React and Next.js, taking full advantage of capabilities like SSR, SSG, and API routes
- Deliver pixel-accurate, mobile-first interfaces that adjust smoothly across screen sizes, paying particular attention to refining layouts, animations, and touch behaviors for mobile viewports on iOS and Android browsers




- Handle sophisticated client-side state through libraries such as Redux, Zustand, or Context API, while connecting applications to backend RESTful or GraphQL APIs
- Analyze and fine-tune applications to reach top-tier loading speeds, healthy Core Web Vitals scores, and fluid rendering on less powerful mobile hardware
- Produce clean, maintainable, and testable JavaScript/TypeScript code, perform in-depth code reviews, and expand the shared UI component library

Requirements
- A minimum of 5 years of demonstrated professional experience in software development
- At least one year of experience guiding and coordinating development teams
- Track record in modern web development with a clear emphasis on shipping user-facing functionality
- Deep command of JavaScript (ES6+), TypeScript, and React for creating scalable and interactive front-end applications
- Hands-on experience with the Next.js framework, covering App Router or Pages Router as well

📌 Lead JavaScript Developer (Guadalajara)
🏢 Epam Systems
📍 Guadalajara