Hi! I'm Ezequiel, a software developer specialized in backend with a passion for creating scalable, efficient, and robust solutions.
My focus is on designing and building systems that not only work but endure and evolve.
I mainly specialize in backend development, but I also have frontend experience with Astro, HTML, and CSS to create simple and efficient interfaces.

I combine practical experience with constant curiosity for new technologies to deliver effective solutions to any challenge.

Also experienced with:

• Logging tools: Morgan, Winston
• API documentation: Swagger (OpenAPI 3.0)

• MySQL, SQLite, MongoDB
• Prisma, Sequelize (ORMs for SQL)
• Mongoose (ODM for MongoDB)

🔗 RESTful API Development
Creation of scalable and well-structured APIs with Node.js, Express, and TypeScript, applying best practices such as separation of concerns and SOLID principles.

🔐 Authentication and Security
Implementation of robust authentication systems using OAuth2 and JWT to ensure application security.

💾 Database Integration

• NoSQL (MongoDB): Development with flexible data schemas using ODMs like Mongoose
• SQL (MySQL/SQLite): Applications requiring ACID transactions and complex data relationships using ORMs like Sequelize

☁️ Cloud Work
Experience using cloud services such as Google Cloud and Dropbox for storage, deployment, and application management.

🔧 Technical Problem Solving
Query optimization, error handling, and web application performance improvement.

CLI tool for text file analysis

A powerful command-line tool developed in TypeScript that allows analyzing text files, generating statistics, extracting code comments, and managing directories efficiently.

Key features:

• Statistical analysis of text files (word count, frequencies)
• Comment extraction from programming files
• Word and phrase search across multiple files
• Multi-language support (English and Spanish)
• Intelligent stopword filtering

Tech stack:

• TypeScript for static typing and better maintainability
• Jest for unit testing
• TypeDoc for automatic documentation
• ESBuild for fast bundling
• ES6+ with modern syntax

npm install -g txtspy

RESTful API e-commerce

A robust and scalable API built to handle essential e-commerce operations such as product management, user authentication, and order processing — optimized for production and containerized deployment.

Key features:

• JWT-based authentication
• CRUD operations for products, users, and more
• Middleware for token validation and error handling
• Swagger documentation for endpoints
• Docker and Render-ready setup

Tech stack:

• Node.js & Express for backend logic
• TypeScript for type safety
• MongoDB with Mongoose for data modeling
• Winston & Morgan for structured logging
• Docker for containerization
• Swagger UI for API documentation

TypeScript library for consistent HTTP error handling

A comprehensive library designed for seamless error management across Express, NestJS, and Fastify APIs. Provides type-safe error classes, framework-specific middleware, and standardized responses to simplify backend development.

Key features:

• Pre-built error classes for common HTTP statuses (400, 401, 403, 404, 422, etc.)
• Framework integrations for Express, NestJS, and Fastify
• Type-safe with full TypeScript support
• Consistent API error responses
• Customizable and extensible for custom error types
• Well-tested and reliable

Tech stack:

• TypeScript for type safety and developer experience
• Node.js runtime
• Express, NestJS, Fastify integrations
• Subpath exports for modular imports
• Comprehensive testing with full coverage