I’m Juan Lopez, a senior full stack engineer with 9+ years of experience building and maintaining high-performance web applications and dashboards, along with secure, scalable back-end systems.
I’m Juan Lopez, a senior full stack engineer with 9+ years of experience building and maintaining high-performance web applications and dashboards, along with secure, scalable back-end systems. I work across modern JavaScript/TypeScript frameworks and focus on clean architecture, performance, and reliable CI/CD delivery using Docker, Kubernetes, and cloud platforms.
I also develop mobile and AI-powered features, leveraging React Native, Ionic/Flutter, and Expo for great user experiences, plus AI services and LLM workflows to deliver intelligent chat and automation capabilities. From REST and GraphQL integrations to testing, monitoring, and responsive UI work with Tailwind, Material UI, and Bootstrap, I’m passionate about turning complex requirements into dependable products.
This project developed in Roku TV, Fire TV, Tizen TV and Android TV. This app have home screen, search screen and detail screen. We have showing ads like pre-roll, mid-roll, post-all using vast tag4
As a skilled web developer & full-stack developer, I built this innovative travel web app to empower users worldwide. This website uses AI tool, interactive map & geolocation for smooth exploration. Built with React for frontend development & Node.js for backend solutions, it ensures responsive, scalable performance. As a freelance developer, I focused on clean code, design & accessibility. This shows expertise in AI-driven web development, full-stack engineering, and community platforms.
Kunooz is an Ecommerce Web and Mobile Application for Purchasing Cosmetic Products. Customers can filter products based on certain categories, best-selling items, and discounted offers and add them to the cart with Promo code functionalities for placing the order. Customers can also scan the bar code of the product to search the product automatically. Skills and deliverables
I developed a responsive React-based wellness platform for Nour Danno, designed to reflect the elegance and mindfulness of her brand. The interface was built using Material UI for a clean, modern look with modular, reusable components. The app includes: Dynamic Hero and CTA sections Branch-based routing for smooth page transitions Programs and Classes module (Pregnancy, Hormonal Health, Nutrition) Interactive Blog & Podcast components with custom filters AWS S3 media storage for optimized image and video delivery SEO-friendly structure and serverless deployment on AWS
Strava is a leading fitness platform for tracking running, cycling, and outdoor activities, serving over 100 million users. The web app is built with React, Next.js, and Backbone.js for a dynamic, high-performance UI, while Ruby on Rails powers the robust backend. Sentry ensures real-time error monitoring, and AWS provides scalable cloud infrastructure. I can deliver similar, scalable solutions using this modern stack, integrating advanced analytics, social features, and seamless device compatibility
Developed cross-platform mobile applications with React Native and Expo, integrated with a Django back end and Stripe payments, and delivered real-time location-based features using Mapbox. Built a modern full-stack web platform using React.js, TypeScript, Refine.dev, and Material UI with deployment via Fly.io using Docker containers. Designed robust back-end services in Django with PostgreSQL and optimized deployments for scalability, security, and maintainability. Integrated OpenAI APIs for an AI chatbot, content/blogging workflows with Ghost CMS and Strapi, and improved UX using React, Material UI, and Tailwind. Implemented end-to-end CI/CD pipelines with Docker and Fly.io and leveraged Refine.dev to rapidly build CRUD/admin interfaces connected to multiple back ends (Strapi, Django, and custom APIs).
Developed a modern web application and admin panel using React.js, TypeScript, Tailwind CSS, and Next.js for SSR, improving SEO and load times through optimizations like load balancing and data-structure improvements for telecom client use cases. Built a social media web application with React.js, Redux, and Tailwind, integrating Firebase for real-time data updates. Implemented AI chatbot workflows using LLMs, LangChain, Pinecone vector database, and Azure OpenAI. Added automated testing for React.js components using Jest and Enzyme. Integrated GraphQL using Apollo Client on the React.js front end and built secure REST APIs with Django. Used Agile/Scrum practices, Git/GitLab for version control, and Trello for streamlined planning and collaboration.
Contributed to the Platform Insights application, an internal platform used to discover and understand data across entities such as datasets, internal dashboards, and business metrics. Used Fusion.js as the primary framework for constructing a web app. Leveraged Vue.js to build the application front end and created interactive components such as charts, tables, filters, and menus for presenting data and insights. Implemented Vuex for consistent and predictable global state management across the application. Designed and implemented RESTful APIs using FastAPI to enable seamless integration between front end and third-party services, focusing on performance optimizations including lazy loading, memoization, and efficient rendering. Performed rigorous testing (unit, integration, end-to-end) using tools like Jest and Enzyme to ensure reliability and robustness.
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