Years Experience
AI & Full-Stack Development
Hi, I'm Guillermo Marín
I build AI-powered applications that deliver real business value
Full Stack Developer specializing in integrating AI technologies (LLMs, RAG systems, vector databases) into production applications. I help businesses leverage OpenAI and Google Gemini to create intelligent solutions that drive measurable results.
Users reached with PrecioPana in first month
Gemini API Competition finalist with LMS-AI
Workload reduction with Repo Assistant AI
Meet the Developer Behind the AI Solutions
Systems Engineer specialized in AI with 5+ years creating solutions that deliver real business value
Guillermo Marín
Lead Full Stack Developer
Professional Summary
Full Stack Developer with specialized expertise in integrating AI technologies (LLMs, RAG systems, vector databases) into production applications. With over 5 years of experience, I focus on delivering practical AI solutions that drive real business value.
I've successfully built AI-powered products including conversational agents, analytics systems, and personalized platforms leveraging OpenAI and Google Gemini. My work has achieved significant impact, including 10K+ users in the first month for PrecioPana and 50% workload reduction with Repo Assistant AI.
Currently serving as Lead Full Stack Developer at RoraimaDevs, I specialize in Next.js, Node.js, and Python, with a focus on transforming business requirements into scalable, production-ready AI applications.
Technical Expertise
Featured Projects
Real-world applications where AI drives business transformation
PrecioPana
Real-time supermarket price comparison SaaS platform for Venezuela
AI-Powered Dashboard Platform (Datamission)
Dynamic dashboard with configurable cards and AI insights
LMS-AI
Custom Learning Management System with personalized AI content
Villa De Marcos Booking System
Custom booking system with AI-powered WhatsApp automation
Ready to Build Your Next AI Solution?
With my experience in production AI applications, let's transform your business ideas into scalable solutions
Start Your ProjectProfessional Experience
5+ years of full-stack development with specialized expertise in AI integration and business automation
RoraimaDevs
Lead Full Stack Developer
July 2021 – Present · Remote
Leading AI integration initiatives and full-stack development projects with focus on business automation and productivity enhancement.
- Developing internal application with speech-to-text models for automated meeting summaries, enhancing team productivity by 30%
- Built web platform with AI-powered chat bot for WordPress API management via custom MCP server
- Developed real-time charting interface integrating OpenAI APIs for dynamic data visualization
- Established CI/CD pipelines using GitHub Actions and Docker, reducing deployment times by 40%
Oxoft
WordPress Full Stack Developer
June 2019 – July 2021 · Remote
Specialized in WordPress development and custom solutions for international clients across multiple industries.
- Developed and maintained over 15 client websites using WordPress, PHP, HTML, CSS, and JavaScript
- Created custom WordPress plugin for offline payment processing specific to Venezuelan regulations
- Collaborated with design teams on website and blog redesigns to enhance user engagement
Villa De Marcos
Full Stack Developer
Mar 2024 – Sep 2024 · Remote
Delivered complete custom booking system with AI automation for hospitality client.
- Developed custom booking system using Next.js and Stripe integration
- Built AI-powered WhatsApp bot using LLMs for automated booking and guest support
- Implemented seamless fallback to human support for enhanced user experience
Education
Academic Background
Santa Maria University
Bachelor of Science in Systems Engineering
Sep 2015 – June 2023 · Barcelona, Venezuela
Core Strengths
What sets me apart
Technical Skills & Expertise
Comprehensive technical stack focused on modern web development and AI integration for production applications
Programming Languages
Frameworks & Libraries
AI Technologies
Databases
Cloud & DevOps
Communication & Collaboration
Specialized in AI Integration
Expert in combining traditional web development with cutting-edge AI technologies to create intelligent applications that drive real business value
Featured Projects
Real-world applications showcasing AI integration, full-stack development, and measurable business impact
PrecioPana
Full Stack Developer · Personal Project · Nov 2024 – Present
SaaS platform for real-time supermarket price comparison in Venezuela with AI assistant and WhatsApp bot integration.
AI-Powered Dashboard Platform (Datamission)
Developer · Internal Project · Nov 2024 – Present
Dynamic dashboard application with configurable cards, direct SQL integration, and AI assistant for natural language insights.
LMS-AI
Architect & Developer · Personal Project · Mar 2023 – Present
Custom Learning Management System with personalized AI content, accepted into Google Gemini API Competition.
Repo Assistant AI
Developer · Personal Project · Jan 2024 – Present
GitHub application using TypeScript and Docker to enhance repository management with AI-driven automation.
Villa De Marcos Booking System
Full Stack Developer · Client Project · Mar 2024 – Sep 2024
Custom booking system for hospitality client with AI-powered WhatsApp bot for automated guest services.
Professional Services
Comprehensive AI and full-stack development services designed to transform your business ideas into production-ready applications
AI Integration & Development
Custom AI solutions using LLMs, RAG systems, and vector databases to solve real business problems.
- AI-powered chatbots and conversational agents
- RAG systems with Pinecone and LangChain
- Custom OpenAI and Gemini integrations
- AI assistants for data analysis and insights
Full-Stack Web Development
Modern web applications built with Next.js, React, Node.js, and TypeScript for scalable solutions.
- Next.js applications with TypeScript
- Backend APIs with Node.js and Python
- Database design (PostgreSQL, MongoDB)
- CI/CD pipelines and deployment
WhatsApp Bot Development
Intelligent WhatsApp bots that automate customer service, bookings, and business processes.
- Custom WhatsApp Business API integration
- AI-powered natural language understanding
- Automated booking and inquiry handling
- Seamless human agent handover
AI-Powered Analytics Platforms
Dynamic dashboards with AI insights for data visualization and business intelligence.
- Real-time data visualization
- AI-generated insights and recommendations
- Custom SQL query interfaces
- Interactive dashboard components
Automation & Integration
Streamline business processes with custom automation solutions and API integrations.
- Business process automation
- Third-party API integrations
- Workflow optimization
- Performance monitoring and alerts
Consulting & Strategy
Technical consultation for AI adoption, architecture review, and technology strategy.
- AI readiness assessment
- Technical architecture planning
- Technology stack recommendations
- Team training and knowledge transfer
Ready to Transform Your Business with AI?
Let's discuss your project requirements and create a custom solution that delivers measurable results. From concept to deployment, I'll guide you through every step of the process.
Ready to deploy your AI partner?
Drop a message with your product vision, and I’ll map out how an AI assistant or automation can unlock it within days—not months.