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Diego Armando Guillen de la Cruz

@diegoarmandoguillend

Software Engineer building Python backend systems, including an AI-powered restaurant ordering platform with Google Gemini and deterministic order workflows.

Mexico

Message

Since 2024, I’ve worked independently on software projects, including an AI-powered restaurant ordering platform that turns natural-language requests into structured orders using Google Gemini.

I designed its deterministic workflow for intent handling, product resolution, cart management, review, checkout, and order creation, keeping critical business rules outside the LLM. I also developed its FastAPI backend and React/TypeScript administrative dashboard with real-time order tracking.

At SW-LIMAC, I developed a .NET 7 API integrating the CONTPAQi SDK and a Windows service that automated Shopify sales synchronization with accounting systems. I also built backend APIs for biometric access-control systems.

At ALTERNATURA PRODUCE, I developed Python automation software for agricultural irrigation systems and integrated industrial PLCs for real-time monitoring and control. Automation improvements contributed to approximately 30% energy savings, and I also developed ERP modules and a point-of-sale system.

Experience

Work history, roles, and key accomplishments

Current

Independent Software Engineer

Current

Self Employed

Jan 2024 - Present (2 years 9 months)

Design and develop backend and full-stack applications using Python, FastAPI, PostgreSQL, React, TypeScript, Redis, Docker, and REST APIs. Designed and deployed an end-to-end AI-powered restaurant ordering platform using Google Gemini to convert natural-language requests into structured orders.

Python fastAPI PostgreSQL React TypeScript Redis Docker REST APIs Gemini SQLAlchemy JWT WebSockets Redis Pub Sub Render Vercel Flask EC2 Nginx HTTPS

Software Engineer

SW-LIMAC

Jan 2023 - Jan 2024 (1 year)

Developed a .NET 7 API integrating the CONTPAQi SDK to expose employee and payroll information to external applications. Designed integration workflows that reduced dependencies on client-side processes and built backend APIs for biometric access-control systems.

Net 7 Contpaqi SQL REST APIs Business Integration Automation Windows Services Shopify Biometric Access Control

Software Engineer

Alternatura Produce

Jan 2020 - Jan 2023 (3 years)

Developed Python-based automation software for agricultural irrigation systems running on Raspberry Pi 4. Integrated industrial PLC systems over LAN for real-time monitoring and control of irrigation equipment, contributing to approximately 30% energy savings.