Experience3 years, 10 months.
FULL-STACK SOFTWARE ENGINEER · INDEPENDENT DEVELOPER
hey, I’m Guada.
I’m an engineer who enjoys understanding systems in context: the custom workflows behind them and the people who rely on them. I build reliable software that fits the way work actually happens and makes it simpler.
↗ WHAT DRIVES ME
Making thoughtful technical choices, working generously with others, and building software that remains cared for over time.
About me.
My work spans user-facing interfaces, APIs, data, and the practical details that make a product work well as a whole. I build integrations and internal tools that support daily work.
Backend engineering is where I feel most at home, especially background jobs, queues and retries, observability, authentication, and clear service boundaries. At the same time, I care about the whole development lifecycle, from understanding a problem to shipping and supporting a solution.
On a normal workday I use AI agents, MCP servers, and coding assistants for research, prototyping, and routine development tasks. I find this new wave of tools fascinating.
Experience.
Professional experience across SaaS, logistics, integrations, and internal tools.
Software Engineer
MedTrainer ↗Owned Symfony features from design through production support for a SaaS platform serving 8,000+ organizations. Authored and presented technical design proposals, and designed and shipped an internal MCP integration to production on OpenAI’s Responses API.
Full-Stack Developer
Mienvío ↗Owned the Laravel 5.2 to 6.x monolith migration version by version for a logistics platform serving 1,000+ active merchants. Built and publicly shipped API v2 for shipment rates and labels with a staged rollout; implemented SAML 2.0 SSO with Auth0 for enterprise customers; maintained and refactored marketplace and carrier integrations.
Web Developer Intern
Universidad Politécnica de Querétaro ↗Worked on system analysis, UI implementation, Laravel APIs, and documentation.
Projects.
Each project includes a concise case study of the system, trade-offs, and delivery. My professional experience is described separately in the Experience section.
Internal tool
Book Management System
A local book-management dashboard with role-based access, append-only audit history, and live notifications.
Laravel Vue.js Node.js TypeScript Redis
View projectIntegration & document processing
CFDI 4.0 Generator
A focused Laravel technical test that converts structured JSON into CFDI 4.0 Ingreso XML and validates it locally.
Laravel PHP Docker
View projectPublic data application
Geographical Keys
A public Laravel application for browsing Mexico’s federal entities and municipalities through the INEGI Geo Catalog.
Laravel Vue.js MySQL Docker
View projectServices.
I take on focused work involving integrations, automation, backend systems, and internal tools.
Primary focus
APIs & integrations
Connect e-commerce, payment, shipping, invoicing, and internal systems through APIs and webhooks.
Focused offer
Automation & data
Automate repetitive reporting, CSV, spreadsheet, and data-cleanup tasks.
Primary focus
Backend & web systems
Build and maintain APIs and web systems with PHP, TypeScript, JavaScript, Go, Python or other languages as appropriate for the project.
Focused offer
Custom tools & AI
Build small internal tools and practical AI-assisted workflows for specific needs.
Technologies I use.
A mix of what I use often and things I’m getting better at.
PHP Laravel Symfony Node.js NestJS Python Go REST APIs SOAP APIs Microservices JavaScript TypeScript React Vue.js Nuxt PostgreSQL MySQL Redis Docker Amazon S3 Amazon SQS Amazon EC2 Git GitHub Actions Jenkins PHPUnit Swagger Sentry New Relic Model Context Protocol (MCP) OpenAI Responses API Hermes Agent Codex Claude Code GitHub Copilot
Contact.
Have a project in mind, or want to talk about working together?