Python Backend with +15 years building production systems: REST APIs with FastAPI and Django, complex integrations (REST, XMLRPC, SOA), Automation, Microservices and legacy system migration. Specialist in Odoo ERP, electronic invoicing, and ETL processes on PostgreSQL. I manage my own infrastructure (Proxmox, Docker, Kubernetes, CI/CD) where I develop, test and deploy end-to-end solutions. Experience across multiple sectors: finance, retail, manufacturing, telecommunications and services. I complement my backend profile with hands-on AI Engineering experience: designing RAG Pipelines, Agentic AI, Prompt Engineering workflows and solutions with LLM, applying AI to solve real business problems.
Development and maintenance of custom Odoo ERP modules for field service management, improving coordination and traceability of on-site technical tasks. Resolution of critical production bugs impacting the daily operations of the clinical engineering team. Design and deployment of production infrastructure based on Proxmox with LXC containers, ensuring ERP availability and reducing operational costs.
Designed and developed RESTful APIs with FastAPI for a digital services platform, implementing JWT authentication with granular role-based authorization. Built the administrative backoffice with comprehensive user management, permissions and report generation. Integrated AWS services (S3 for storage, SES for notifications) and established the deployment pipeline with Docker, including production monitoring and logging.
Led the migration of legacy automation processes to Python, replacing obsolete scripts with robust solutions using SFTP, MSSQL and data processing with Pandas. Defined the team's DevOps guidelines, implementing CI/CD pipelines with Jenkins and container orchestration on Kubernetes. Developed the internal RPA-UTILS library, standardizing robotic process automation and reducing development time for new automations.
Grew from Developer to Senior leading +7 Odoo ERP implementations in retail, manufacturing and services. Developed custom modules with Python/ORM and implemented the Electronic Invoicing system for SUNAT (XML, digital signature, OSE). Built complex integrations with REST, XMLRPC and SOA APIs against third-party systems. Designed the deployment infrastructure on AWS (EC2, Route53, S3) with Docker and established the CI/CD pipeline with GitLab CI, including a mini-PaaS for environment management. Optimized PostgreSQL, developed ETL data migration processes and trained both end users and Junior developers.
Full-Stack web development (PHP/Laravel, Python/Odoo, VueJS, WordPress), technology consulting and ERP modules for clients across 4 sectors in Venezuela, Chile and remote engagements. Extended CV at https://resume.rafnixg.dev
Self-hosted AI lab on multi-host Proxmox infrastructure with ~56 operational containers managed via Docker/Portainer. Integrates AI services like AnythingLLM, OpenClaw and autonomous agents in n8n for LLM-powered workflow automation. Enables hands-on evaluation of open-source SLM/LLM models via LM Studio, comparing quality, latency and cost per use case.
Real-time seismic monitoring application for Venezuela with official FUNVISIS data. FastAPI backend (Python 3.13) with modular architecture, interactive Leaflet.js map, advanced filters and statistics updated automatically every 5 minutes. Deployed with multi-arch Docker, CI/CD with GitHub Actions, SEO optimized (Open Graph, Schema.org) and Cloudflare Tunnel compatible.
Open-source Python library published on PyPI that works as a personal card from the terminal. Includes CLI with multiple commands: styled personal info with Rich, blog posts via Hashnode GraphQL API and JSON resume parser. Automated PyPI publishing via GitHub Actions.
Educational implementation of a WSGI server built from scratch following the PEP 3333 specification. Includes custom routing system, middleware, Request/Response object abstraction and FastAPI compatibility. Designed as a learning resource about web server architecture and the HTTP protocol.
Exchange rate API combining official BCV data with Binance P2P USDT prices for the Venezuelan market. Built with FastAPI, includes SQLite persistence for historical analysis, web interface, health checks and scheduled automated updates. Aimed at providing transparent and accessible financial data.
Music download tool with Spotify metadata optimized for Jellyfin servers. Retrieves audio from YouTube Music via yt-dlp, generates synchronized LRC lyrics and NFO files with automatic folder structure. Offers three interfaces: CLI, REST API and Web UI with real-time progress. Deployed with Docker via GitHub Container Registry.
Python, FastAPI, Django, Flask, Odoo ERP, Odoo Development, REST APIs, GraphQL, Microservices, XML/XMLRPC, Electronic Invoicing, Payment Integration, WooCommerce, E-commerce Platforms, API Design
PostgreSQL, MySQL, MariaDB, Redis, SQLite, Database Optimization, Query Performance, Pandas, Apache Airflow, ETL Pipelines, Automation, RPA, Web Scraping, BeautifulSoup
LLM, LLM Application Design, RAG Pipelines, Agentic AI, Prompt Engineering, Tool Calling, LangGraph, LangChain, n8n Agents, AnythingLLM, LM Studio, Open-Source LLM Evaluation, AI Observability
AWS (EC2, S3, SES, Route53), Docker, Docker Compose, Kubernetes, Linux Administration, Bash Scripting, CI/CD, GitHub Actions, GitLab CI, Jenkins, Terraform, Infrastructure as Code, Proxmox, LXC, LXC Containers, Portainer, NewRelic APM, Cloudflare, Cloudflare Tunnels, Travis CI, Uptime Kuma, Pi-hole, Service Reliability, Self-hosted Platforms
JavaScript, HTML5, CSS3, Vue.js, React, jQuery, Jinja2, Leaflet.js, Responsive Design
RabbitMQ, Celery, Event-Driven Architecture, Asynchronous Processing, Git, GitHub, GitLab, VS Code, Regular Expressions, Code Review, Agile Methodologies, TDD