AI Engineer & MERN Stack Developer | LLM, RAG, Chatbots, APIs
Hi, I'm Guillermo Lopez - a Full-Stack AI Developer specializing in web and mobile application development, OpenAI API integration, machine learning models, AI chatbots, automation systems, and business-ready software solutions.
I help businesses build practical AI-powered digital products from idea to working application.
I can create responsive websites, mobile-friendly web apps, dashboards, backend APIs, ChatGPT-style assistants, customer support chatbots, document Q&A systems, predictive machine learning models, and workflow automation tools.
My strength is combining AI engineering with full-stack development.
That means I can build the frontend interface, backend logic, database connection, API integration, AI workflow, and clean delivery structure in one complete solution.
- What I can help with:
✅OpenAI API integration for websites and apps
✅AI chatbot and assistant development
✅Machine Learning prediction models
✅Web and mobile-friendly application development
✅React, Node.js, Next.js, Python, FastAPI, and MERN stack apps
✅Backend API development and 3rd-party integrations
✅Dashboard UI, admin panels, and business portals
✅PDF/document AI and RAG-based Q&A systems
✅Workflow automation and AI business tools
✅Responsive design for desktop, tablet, and mobile
✅Clean source code, testing, and setup documentation
My process is simple and professional.
I review your goal, plan the system, build the frontend and backend, connect APIs or AI features, test carefully, and deliver clean source code with clear instructions.
If you need a developer who can build AI-powered web/mobile applications, OpenAI integrations, chatbots, Machine Learning models, or full-stack business platforms, I can help you turn your idea into a working solution.