Roberto A. López

Full-Stack Developer — React, Node.js & PostgreSQL

About Me

I build modern web applications focused on performance, usability, and real-world business needs.

I’m a Full-Stack Developer with a background in audio engineering and creative production, which gives me a unique edge in building user-focused digital products.


I specialize in developing complete web applications from front-end to back-end using technologies like React, Node.js, Express, PostgreSQL and REST APIs.


I have built real-world projects involving authentication, databases, APIs, and cloud deployment, and I focus on writing clean, maintainable, and scalable code.


My goal is to join a professional development team where I can contribute, grow, and help build meaningful products that users love.

Services

End-to-end web development services for startups, teams, and digital products.

Full-Stack Web Development

Design and development of complete web applications including frontend, backend, databases, and authentication systems.

Backend & API Development

Building secure and scalable REST APIs using Node.js, Express, and PostgreSQL, including user authentication and data management.

Frontend Development

Modern, responsive user interfaces built with React, focusing on performance, usability, and clean design.

By The Numbers

Real experience building and deploying full-stack applications.

5+

Full-Stack Projects

1000+

Hours of Coding

15+

GitHub Repositories

2

Deployed Applications

Featured Work

A selection of full-stack projects demonstrating my frontend, backend, and database skills.

SmartBrain – Face Recognition App

A full-stack web application that allows users to register, log in, and submit image URLs to detect faces using an external AI API.


SmartBrain is a production-ready full-stack web application where users can create accounts, log in, and submit image URLs to detect human faces. The frontend is built in React and communicates with a custom backend API developed with Node.js and Express. User data and image submissions are stored in a PostgreSQL database. The app integrates with a third-party face detection API, allowing real-time image analysis. Because the backend is deployed on Render, the first request may take a few seconds to respond due to server cold start — after that, performance becomes normal.

React Node.js PostgreSQL REST API Authentication

User Management System

Backend system with authentication, password hashing, database, and REST API endpoints for managing users and permissions.

REST API Express Password Hashing PostgreSQL

Let's Create Something Amazing

Ready to build or improve your web application? Let’s talk.

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