Hi, I'm Daniel Ruiz
Technical Lead & Software Engineer

Currently Technical Lead at Spotahome. I design and build scalable backend systems, modern web applications, and mobile experiences. Based in Spain, passionate about clean code and great user experiences.

View My Work GitHub
// About Me

A little about myself

Daniel Ruiz — Software Engineer avatar

Building software that matters

I'm a Technical Lead at Spotahome based in Spain. With a background in Computer Engineering from Universidad de Cádiz and previous experience building scalable systems at companies like Zankyou, I specialize in building robust backend services, crafting intuitive frontend interfaces, and developing cross-platform mobile applications.

With experience across multiple languages and frameworks — from PHP and Go on the backend, to React and React Native on the frontend — I enjoy tackling complex problems end-to-end and delivering polished products.

When I'm not coding, you'll find me exploring new technologies, contributing to open-source projects, or discovering new places ☕.

18 Repositories
524 GitHub Stars
6+ Languages
// Tech Stack

Skills & Technologies

A versatile toolkit built through years of shipping real products

🏗️

Software Architecture

Designing scalable, maintainable systems using modern architectural patterns.

DDD Hexagonal Architecture Microservices Event-Driven Clean Architecture CQRS
⚙️

Backend & APIs

Building scalable services, RESTful APIs, event-driven architectures, and microservices.

PHP Go Node.js Python SQL PostgreSQL Docker
🎨

Frontend & Web

Creating responsive, accessible, and performant user interfaces with modern frameworks.

TypeScript React Next.js HTML/CSS JavaScript MUI
📱

Mobile Development

Cross-platform mobile apps with native performance and excellent user experience.

React Native Expo Android
// Blog

Latest Writing

Technical articles and deep-dives published on Medium

· 5 min read

Why Your Struct Takes Up More Memory Than It Should in Golang

An exploration of data alignment, struct padding, and how reordering fields can significantly reduce memory usage and improve performance in Go applications.

Go Performance Memory
Read on Medium
· 6 min read

How to Create an Image in Go, Step by Step

A practical guide on using Go's standard library and image packages to programmatically generate images, draw graphics, and add text overlays.

Go Tutorial Image Processing
Read on Medium
View all posts on Medium
// Projects

Featured Work

A selection of projects I've built and contributed to

🎯

Image Generation Example

A Go-based image generation service demonstrating programmatic image creation and manipulation techniques.

Go Image Processing
🧩

Chrome Extension

A browser extension example showcasing Chrome APIs, content scripts, and extension manifest configuration.

JavaScript Chrome APIs
📱

Android Flavors Tutorial

A practical tutorial demonstrating Android build flavors for managing multiple app variants from a single codebase.

Java Android Gradle
// Published on Google Play

Mobile Apps

Public transit companion apps published under Infoceanic

🚌

Info Metropolitana Granada

Route search, timetables, and transit operator info for the metropolitan area and province of Granada. Powered by the Andalusian Transport Consortium Open Data API.

Android Public Transit Granada
Google Play
🚍

Info Metropolitano Cádiz

Routes, schedules, and stops for intercity public transport in the Bay of Cádiz. Covers Cádiz, San Fernando, Chiclana, and surrounding towns via official open data.

Android Public Transit Cádiz
Google Play
View all apps on Google Play
// Get In Touch

Let's work together

I'm always interested in hearing about new projects and opportunities. Whether you have a question or just want to say hi, feel free to reach out!

GitHub LinkedIn Email Medium