Juan Martin
Canguillen
AI Engineer | Software Engineer
I build production software end to end — web application features, REST API integrations and process automation — with a focus on applying AI to concrete business problems. Core stack: Python, Django, Node.js / NestJS, React and PostgreSQL.
In my last role I built an automation layer with language models that classifies and routes operational data automatically, cutting manual processing by 40%. I use Claude Code daily to review AI-generated code against tests and real behaviour before it ships.
Technical Expertise
I specialize in robust backend systems. My toolkit is built around reliable, scalable, and maintainable technologies.
AI & Automation
Backend Frameworks
Frontend & Tools
Data & NoSQL
Programming Languages
DevOps & Infrastructure
Electronics
Mathematics & Science
Social Sciences, Economics & Finance
Engineering Journey
AI Engineer
Owns services and automation end to end: shipping LLM-driven systems that classify and route operational data automatically, cutting manual processing by 40%.
Key Achievements
- Ship production workflows on n8n, Make and Airtable over REST APIs and webhooks, with conditional logic, workflow validation and error handling.
- Write LLM steps with functional prompts, confidence thresholds and human review routing, so operational data is classified and routed automatically.
- Own data modeling, dashboards, docs and cross-functional delivery of stable systems, end to end.
Software Engineer
Designed and shipped a batch working engine that processes millions of leads daily, with NestJS microservices over PostgreSQL and AI-powered workflow automation.
Key Achievements
- Built a batch engine for millions of daily leads with Node.js / NestJS, increasing system throughput by 35% across high-traffic production environments.
- Integrated OpenAI / Anthropic APIs with custom RAG architectures to automate workflow data extraction, boosting end-user task efficiency by 40%.
- Shipped Vue.js / TypeScript front ends, cutting page load times by 25%, and ran Docker, AWS and GitHub Actions for continuous integration and environment consistency.
Software Engineer Intern
Owned the end-to-end technical execution of a standalone MVP in an Agile team, from requirements gathering through production deployment.
Key Achievements
- Owned a standalone MVP end to end in an Agile team, from requirements gathering to final deployment.
- Enforced code quality standards through peer code reviews and automated unit testing, achieving 95%+ unit-test coverage.
- Delivered production-ready documentation for a dashboard serving 200+ daily users.
Data & Infrastructure Engineer
Built enterprise-grade ETL pipelines for critical infrastructure network analysis across 12 global verticals, from multi-source ingestion to relational and graph models.
Key Achievements
- Built ETL pipelines over GTFS, BGP, AIS and TLE data into standardized relational and graph models, covering 12 verticals.
- Owned compliance and licensing for 20+ official sources, with ISO / IATA QA frameworks and provenance tracking.
- Optimized PostgreSQL schemas and analytical SQL for sub-second monitoring latency.
Full Stack Web Developer
Designed, built, and deployed custom full-stack web solutions for multiple clients, including a real-time auction platform with high-concurrency bidding.
Key Achievements
- Built full-stack solutions, including a real-time auction platform supporting concurrent bidding operations.
- Delivered 10+ client apps with Next.js, React and Django, cutting 3 weeks off time-to-launch per project.
- Developed secure RESTful APIs and user authentication logic with Django, Python, NestJS, and PostgreSQL.
Academic Background
Universidad Empresarial 'Siglo 21'
Focus on scalable software architectures, cloud computing strategies, and agile project management for enterprise environments.
Universidad Tecnológica Nacional
Information Systems Engineering focuses on designing, implementing, organizing, and managing the information systems required by public and private organizations. It combines knowledge of mathematics, programming, data management, software, hardware, and networks.
Nuestra Señora De Luján
Developed strong analytical foundations, critical thinking, and communication skills essential for effective stakeholder management and team leadership.
Licenses & Certifications
Databases and SQL
TodoCode
Comprehensive review to strengthen core foundations in relational algebra and SQL/PLSQL.
JavaScript with NodeJS
Udemy
Generative AI Core Foundations
Microsoft
Foundation C# With Microsoft
Microsoft
#ICanCode JA
Junior Achievement Argentina
C Language From Zero To Expert
Udemy
Plan Your Future - JA
Junior Achievement Argentina
Certification in Ruby and JS: 'Sé Programar'
Mumuki / Argentina Programa
#Socios2021 Apprenticeship
Junior Achievement Argentina
Global Mindset
My international experience and multilingual proficiency enable me to seamlessly integrate into diverse, global engineering teams.
Languages
Cultural Adaptability
Proven ability to thrive in fast-paced international environments in the US, handling diverse customer interactions with resilience.
Work & Travel USA Experience
Beach Attendant
1 Hotels | Miami, FLProvided premium service in a high-end hospitality environment. Refined English communication skills through constant interaction with international guests and effectively solving on-site issues.
Beach Attendant & Cashier
Boucher Brothers Management | Miami Beach, FLHandled fast-paced transactions and logistics in a high-volume tourist area. Developed situational leadership and cash handling procedures while collaborating with a multicultural team.
Selected Work
A selection of projects that demonstrate my ability to solve complex engineering problems and deliver high-quality products.
Dental Clinic Platform
A comprehensive landing page for a dental practice featuring interactive treatment modals, location services, and patient FAQs.
- •Designed a clean, trustworthy UI with accessible navigation.
- •Implemented custom modals for detailed procedure information.
- •Integrated location services and responsive FAQ sections.
Mundo Figus Store
Full-stack SEO-first e-commerce platform built end-to-end with ownership across architecture, backend, frontend, data model, infrastructure, and deployment.
- •Built a production-grade architecture with SSR storefront, REST APIs, auth, admin roles, and transactional workflows.
- •Implemented SEO-driven product pages, metadata strategy, and performance optimization for organic acquisition.
- •Deployed and operated the platform on private VPS infrastructure with containers, Nginx, and automated releases.
MundoFigus Mobile App
Native mobile app for the Mundo Figus sticker-album business: browse the album catalog, track which stickers you own or still need, and buy or exchange the missing ones with a built-in cart and checkout.
- •Built the cross-platform app in Flutter/Dart with Riverpod state management, GoRouter navigation and secure local storage for auth tokens.
- •Designed the collection UX: cover catalog by release year, numbered sticker grid with owned/missing/just-acquired states, and a cart with subtotal and checkout.
- •Owned the FastAPI + PostgreSQL backend with SQLAlchemy/Alembic migrations, Redis caching, Mercado Pago payments and Firebase Cloud Messaging push notifications.
- •Shipped through Docker Compose and Nginx, with Codemagic CI/CD pipelines for Android releases and automated in-app updates.
Real-Time Auction Platform
A backend-driven real-time auction system leveraging Django Channels for instant bidirectional WebSocket communication.
- •Architected a robust WebSocket layer using Django Channels for sub-second updates.
- •Implemented complex bidding logic with purely backend-managed state.
- •Containerized the complete ecosystem using Docker for scalable production deployment.
Enterprise Analytics Dashboard
Ticket Management System with responsive data grids and comprehensive admin panels.
- •Virtualized data grids for performance.
- •Completely responsive UI for mobile administration.
- •Integrated with complex backend ETL pipelines.
Portfolio & Client Sites
High-performance marketing sites and personal portfolio with focus on SEO and Vital metrics.
- •Lighthouse scores > 90 across all metrics.
- •Fully accessible and responsive designs.
- •Automated CI/CD pipelines via GitHub Actions.