Juan Carlos Marrufo 👋

Front-end developer with solid experience building responsive, scalable, and accessible web applications using the MERN stack. I specialize in React and have a strong foundation in full-stack JavaScript development. Core Strengths: React (Hooks, Context API, Router) JavaScript & TypeScript Tailwind CSS, CSS3 (Flexbox, Grid) REST APIs & JSON Git & GitHub / GitLab Clean architecture & SOLID principles Reusable component libraries & design systems Additional Experience: Node.js, Express MongoDB (CRUD, Aggregation, Mongoose) UI libraries: Material UI, Bootstrap, HeadlessUI Form handling: React Hook Form Agile workflows: Scrum, Jira, Trello Testing: Jest, React Testing Library, Supertest, Vitest, Mocha, Chai Working Knowledge Of: Authentication: JWT, OAuth, Firebase Auth Firebase & AWS (S3, EC2 basics) PostgreSQL & SQL Docker & basic DevOps Tools I Use Daily: VS Code, Sublime, Postman, Figma, Chrome DevTools I've worked on production-grade apps with dynamic UIs, role-based access, and mobile-first designs. I led front-end development for internal dashboards and scheduling tools, collaborating closely with back-end engineers and UI/UX designers. I'm passionate about building user-centric, high-performance interfaces that solve real-world problems. Always learning. Always shipping.