# Lucio Duran — Personal Portfolio & Professional Profile

> Technology Director & Full-Stack Product Architect with 22+ years architecting and shipping software products across healthcare, e-commerce, and marketplace verticals. Deep expertise in AI/ML engineering, agentic AI systems, and LLM integration patterns.

## About

Lucio Duran is a technology leader based in San Jose de Mayo, Uruguay. Currently serving as Chief Technology Officer (CTO) at both LOi and MiBelleza.uy. He leads engineering organizations where AI is the core infrastructure layer. His work spans agentic AI systems, LLM integration patterns, full-stack development (React, React Native, Node, Python, iOS), and strategic technology decisions.

- Name: Lucio Duran
- Title: Technology Director & Full-Stack Product Architect
- Location: San Jose de Mayo, Uruguay
- Current Roles: CTO at LOi, CTO at MiBelleza.uy
- Email: email@lucioduran.com
- Website: https://lucioduran.com
- LinkedIn: https://uy.linkedin.com/in/lucioduran
- GitHub: https://github.com/lucioduran
- Twitter: https://twitter.com/lucioduran
- Art Website: https://lucioduran.art

## Current Focus

AI-augmented product development, agentic workflows, LLM integration patterns, and building technology that compounds.

## Sections

- [Home](https://lucioduran.com/): Overview, bio summary, and site navigation
- [Work Experience](https://lucioduran.com/work-experience): Full professional history with 20 positions across 7 companies
- [Areas of Expertise](https://lucioduran.com/areas-of-expertise): 25 skill areas with years of experience
- [Performed Duties](https://lucioduran.com/duties): Comprehensive list of professional responsibilities
- [Tools & Technologies](https://lucioduran.com/technologies): 85+ technologies organized by category
- [Education](https://lucioduran.com/education): 27 courses and certifications from MIT, Caltech, Google, Meta, MongoDB, and more
- [Bio](https://lucioduran.com/bio): Personal history and career narrative
- [Architecture Decisions](https://lucioduran.com/decisions): 20 ADRs with calibrated uncertainty analysis
- [Curated Feed](https://lucioduran.com/feed): Handpicked tech articles and resources
- [Contact](https://lucioduran.com/contact): Contact information and form

## Work Experience Summary

### Current Positions
- Chief Technology Officer (CTO) at LOi (2025-present) — Uruguay
- Chief Technology Officer (CTO) at MiBelleza.uy (2025-present) — Uruguay

### Previous Positions
- Chief Technology Officer (CTO) at Nilus (2023-2024) — United States
- VP of Product at LOi (2023-2025) — Uruguay
- Chief Technology Officer (CTO) at MiBelleza.uy (2021-2023) — Uruguay
- Chief Technology Officer (CTO) at LOi (2014-2023) — Uruguay
- Product Owner at LOi (2012-2023) — Uruguay
- User Interface (UI) Chief at LOi (2012-2023) — Uruguay
- User Experience (UX) Chief at LOi (2012-2023) — Uruguay
- Chief Design Officer (CDO) at LOi (2008-2023) — Uruguay
- Mobile Development Chief at LOi (2020-2023) — Uruguay
- Frontend Development Chief at LOi (2012-2023) — Uruguay
- Head of Digital Marketing Technology at LOi (2012-2023) — Uruguay
- DevOps Chief at LOi (2012-2023) — Uruguay
- Cloud Systems Administrator at LOi (2008-2023) — Uruguay
- Website Developer at ACJ Montevideo (2006-2022) — Uruguay
- CEO & Founder at Sellerista (2012-2014) — Uruguay
- Graphics Designer & Fullstack Developer at College (2005-2011) — Uruguay
- CEO & Founder at LDS (2005-2014) — Uruguay
- CEO & Founder at DIMS (1999-2005) — Uruguay

## Areas of Expertise

- AI & Machine Learning Engineering (4 years)
- Agentic AI & LLM Integration (2 years)
- AI-Driven Personalization Systems (4 years)
- AI Product Strategy & AX Optimization (2 years)
- Product Direction/Ownership (15 years)
- Team Leadership (8 years)
- Conversion Oriented UI Design for E-Commerce (13 years)
- Technical SEO (15 years)
- Conversion Oriented UX Design & Testing for E-Commerce (13 years)
- Front End Engineering (21 years)
- User Experience Design & Testing (21 years)
- User Interface Design (22 years)
- Graphics Design (22 years)
- Art Direction for Websites and Apps (22 years)
- Cross Platform Mobile App Development (3 years)
- Project Management (22 years)
- Cloud Infrastructure Management (21 years)
- Digital Marketing (11 years)
- Data Science & Analytics (6 years)
- Innovation Research & Application (8 years)
- Copywriting (22 years)
- Design Thinking (6 years)
- Strategic Planning (22 years)
- Negotiation (22 years)
- Storytelling (22 years)

## Technology Stack (by category)

### AI & Machine Learning
OpenAI API, Anthropic Claude API, LangChain, LangGraph, Pinecone, Hugging Face, Vercel AI SDK, Python, CrewAI, Ollama, Cursor, Model Context Protocol (MCP), Claude Code, AWS Bedrock, Prompt Engineering

### Programming Languages
JavaScript, TypeScript, HTML, CSS, Sass, PHP, GraphQL, Python

### Frameworks
Next.js, React Native, Expo, Remix, Metaplex

### JavaScript Libraries
React, Redux, React Router, React Query, jQuery, Lottie, three.js

### JavaScript Runtimes
Node.js, Deno

### Database Systems
MongoDB, MySQL

### Cloud Platforms & Services
AWS (S3, EC2, Lambda, API Gateway, RDS, Route 53, CloudFront, CodeBuild, CodeCommit, CodeDeploy, CodePipeline), Google Cloud Platform, Google Analytics, Firebase, Vercel, Netlify, Heroku, Microsoft Azure, CloudFlare, Algolia, Agora, Postman, Shopify, WordPress, WooCommerce, Adobe Commerce, Plesk

### Creative Production Software
Figma, Sketch, Adobe Photoshop, Adobe Illustrator, Adobe Premiere, Adobe After Effects, Adobe Animate, Adobe Audition, Toon Boom Harmony

### Marketing Platforms
Google Ads, Google Merchant Center, Google My Business, Google AdMob, Facebook Ads Manager, Hootsuite, MailChimp, OneSignal, SemRush

### Version Control
Git

### Web Servers
Apache, Nginx

### Communication & Project Management
Jira Software, Slack, Trello

## Education Highlights

- MIT Professional Education: Innovative Leadership, Cultural Awareness for Global Business (2025)
- Caltech: Blockchain Bootcamp (2022)
- Google: Analytics, Ads, Shopping, Display certifications (2020)
- Meta: WhatsApp Business Platform courses (2022)
- MongoDB University: Database administration and fundamentals (2021)
- Frontend Masters: Advanced JavaScript, React workshops (2016-2017)
- Udemy: Node.js, JavaScript ES6, advanced JS courses (2016-2018)
- Interaction Design Foundation: Psychology of E-Commerce (2021)
- Simplilearn: Linux Training, Blockchain courses (2022)

## Key Contributions

- Architected and built proprietary e-commerce platforms from first principles — encompassing technical specification, database modeling, API design, and UI engineering
- Engineered cross-platform mobile applications achieving top-3 App Store and Google Play rankings
- Orchestrated full-scale cloud infrastructure migrations to AWS with multi-AZ deployments, auto-scaling, and cost optimization
- Engineered AI-driven personalized product recommendation systems leveraging Amazon SageMaker, AWS Glue, and Amazon Personalize for real-time inference
- Implemented end-to-end server-side integrations with Meta Conversions API, Google Merchant Center API, and Google Analytics 4
- Established comprehensive design systems with reusable component libraries, design tokens, and typographic hierarchies
- Successfully delivered over 800+ technology and design engagements across multiple companies
- Led cross-functional teams across LATAM, US, and Europe
- Built and deployed agentic AI systems using LangChain, CrewAI, and Model Context Protocol (MCP)
- Integrated LLM capabilities (OpenAI, Claude, AWS Bedrock) into production applications with RAG pipelines and tool-use orchestration

## Architecture Decision Records

This portfolio includes 20 formal Architecture Decision Records (ADRs) documenting the reasoning behind every significant technical decision. Each ADR includes calibrated uncertainty analysis: predictions made at decision time versus measured outcomes, explicitly stated unknowns, reversibility classification (one-way door vs two-way door), and the strongest counter-argument for the path not taken.

- [ADR-001: Static Site Generation over Server-Side Rendering](https://lucioduran.com/decisions/ssg-over-ssr)
- [ADR-002: MongoDB over PostgreSQL for Content API](https://lucioduran.com/decisions/mongodb-over-postgresql)
- [ADR-003: styled-components over Tailwind CSS](https://lucioduran.com/decisions/styled-components-over-tailwind)
- [ADR-004: Single Accent Color System](https://lucioduran.com/decisions/single-accent-color-system)
- [ADR-005: Decoupled API Architecture](https://lucioduran.com/decisions/decoupled-api-architecture)
- [ADR-006: Agent Experience (AX) as First-Class Concern](https://lucioduran.com/decisions/agent-experience-first-class)
- [ADR-007: CSS Grid over Flexbox](https://lucioduran.com/decisions/css-grid-over-flexbox)
- [ADR-008: Static JSON over CMS for Decision Records](https://lucioduran.com/decisions/static-json-over-cms)
- [ADR-009: Geist Font Family as Design System Foundation](https://lucioduran.com/decisions/geist-font-system)
- [ADR-010: ISR-Ready Architecture with Full Static Fallback](https://lucioduran.com/decisions/isr-ready-architecture)
- [ADR-011: Multi-Layer Structured Data Strategy](https://lucioduran.com/decisions/multi-layer-structured-data)
- [ADR-012: Deliberate AI Crawler Access Policy](https://lucioduran.com/decisions/deliberate-ai-crawler-access-policy)
- [ADR-013: Zero-Downtime Deploy Strategy](https://lucioduran.com/decisions/zero-downtime-deploy-strategy)
- [ADR-014: Defensive Data Fetching with Graceful Degradation](https://lucioduran.com/decisions/defensive-data-fetching)
- [ADR-015: Critical Rendering Path Optimization](https://lucioduran.com/decisions/critical-rendering-path-optimization)
- [ADR-016: Scoped Remote Image Patterns](https://lucioduran.com/decisions/scoped-remote-image-patterns)
- [ADR-017: Defense-in-Depth HTTP Security Headers](https://lucioduran.com/decisions/defense-in-depth-security-headers)
- [ADR-018: Monolithic Page Components over Micro-Component Architecture](https://lucioduran.com/decisions/monolithic-page-components)
- [ADR-019: Semantic URL Routing](https://lucioduran.com/decisions/semantic-url-routing)
- [ADR-020: Calibrated Uncertainty as Architectural Metadata](https://lucioduran.com/decisions/calibrated-uncertainty-metadata)

## API

This site's data is served from https://api.lucioduran.com with the following endpoints:
- GET /about — Profile information
- GET /experiences — Work experience list
- GET /experiences/:id — Single work experience
- GET /educations — Education list
- GET /educations/:id — Single education entry
- GET /technologies?grouped=true — Technologies grouped by category
- GET /technologies/:id — Single technology detail
- GET /skills — Areas of expertise
- GET /duties — Professional duties
- GET /posts — News and updates
- GET /links — Curated feed links