Hi, I'm Jorge Castillo

Declarative migration tool for Cloud Firestore that enables defining field additions, removals, and transforms in simple migration files.

• Built a complete CLI workflow supporting migration generation, dry-run previews, status tracking, and safe rollbacks.
• Implemented flexible operations for adding fields (static defaults or computed values), removing fields, and transforming existing data, with batched writes and migration tracking.
• Delivered a reusable, production-ready package that brings structured, version-controlled schema evolution to Firestore projects.

Lightweight shell-based CLI tool for bootstrapping, managing, and syncing AI-related project files across development environments.

• Created a modular command system that initializes .ai/ project structure (rules, skills, AGENTS.md), generates personalized design documents, and syncs configuration to multiple AI tool formats.
• Implemented practical utilities including status checks, diagnostic doctor commands, clean installation/uninstallation, and Makefile targets for streamlined workflows.
• Delivered a zero-friction helper that standardizes AI tooling setup and keeps configuration consistent across projects on macOS and Linux.

Lightweight, modular bash-based CLI tool for generating TypeScript boilerplate code aligned with shared-kernel and Domain-Driven Design patterns.

• Created a template-driven system that generates CQRS commands, queries, handlers, aggregates, entities, value objects, domain events, criteria, and exceptions with consistent structure and naming.
• Added support for bounded contexts, TOML-based configuration, and automatic project structure detection, enabling flexible code generation across different domains.
• Delivered a zero-dependency, easily extensible tool that accelerates development and enforces architectural consistency in TypeScript projects following clean architecture principles.

Modular, type-safe foundation for building expressive and maintainable applications with core abstractions for domain modeling, CQRS, authentication, persistence, networking, and more.

• Delivered rich Domain-Driven Design primitives including Aggregates, Entities, Value Objects, Domain Events, Result types, and a fluent Criteria query builder.
• Implemented CQRS (Command/Query buses and handlers), Sagas for long-running processes, Event Bus with retries and dead-letter support, plus interfaces for Auth, RBAC/ABAC, DAO, Unit of Work, Offline Store, HTTP, JSON:API, Pub-Sub, State Management, Guided Tours, i18n, and structured logging/error tracking.
• Created a comprehensive open-source package that enforces type safety, domain expressiveness, and clean architecture principles across frontend, backend, and serverless environments.

Scalable, cloud-native multi-tenant POS and restaurant management platform built with Hexagonal Architecture.

• Architected and led the development of a scalable multi-tenant POS and restaurant management platform using Hexagonal Architecture, isolating core business logic from infrastructure concerns.
• Designed and implemented a high-performance NestJS backend with Firestore, a declarative Criteria pattern, and a fully type-safe DAO layer.
• Integrated Mercado Pago payments and hardware printing services, resulting in 30% faster service times and a 25% reduction in kitchen errors.
• Implemented granular RBAC, real-time notifications, and cross-location inventory synchronization across multiple instances.

Streamlined, modular setup system for macOS and Unix environments that automates installation and configuration of a complete modern developer toolchain.

• Created a two-stage process (setup + configuration) that installs core tools including Homebrew, Mise, NeoVim with NvChad, multiple AI coding agents, and language runtimes for Node.js and Python.
• Implemented modular, idempotent configuration scripts covering LSP support, formatting, indentation, and framework-specific settings for JavaScript, TypeScript, NestJS, Vue, Svelte, Shell, and Markdown.
• Delivered a batteries-included terminal experience that provides a consistent, high-productivity development environment with minimal manual setup.

Type-safe, domain-driven abstraction over IndexedDB persistence integrated with shared-kernel constructs.

• Enabled expressive, consistent, and testable offline data access with full CRUD support and powerful Criteria-based querying (filtering, ordering, limits, and offsets).
• Implemented Unit of Work support for grouping multiple operations into reliable transactions.
• Delivered a reusable, architecture-aligned package that brings clean domain-driven design patterns to browser-based offline storage.

Type-safe, domain-driven abstraction over Firestore persistence using the Firebase Admin SDK.

• Enabled expressive and consistent server-side data access with full CRUD support and Criteria-based querying (filtering, ordering, and limits).
• Provided a clean mapping layer between domain entities and Firestore documents through toPrimitives / fromPrimitives patterns and entity registration.
• Delivered a reusable package that brings Domain-Driven Design principles and strong type safety to backend Firestore operations.