Software Engineer · Valencia, Spain
Leonardo
Maldonado
Software engineer at Namecheap, where I built Spaceship's domain search platform from scratch. Passionate about building fast, polished web experiences.
Software Engineer at Namecheap
Built Spaceship's domain search platform from scratch as the sole front-end developer. React, TypeScript, Zustand, TanStack Query. Reduced API calls by 60%, bundle size by 40%, and re-renders by 80% through WebSocket batching and code splitting.
Technical Author at Progress
Wrote extensively about JavaScript, TypeScript, React, GraphQL, and modern web development for the Telerik blog.
Technical Author at LogRocket
Created content empowering developers to learn about JavaScript, TypeScript, GraphQL, React, Node.js, and programming fundamentals.
Software Engineer at Popstand
Built Taco Maps, a React Native food delivery app for Los Angeles. Architected from the ground up with Redux, TypeScript, Firebase, and Detox e2e testing.
Software Engineer at Foton
Delivered React and React Native applications for Brazilian banking projects. Built scalable frontend solutions with Redux, TypeScript, and Firebase.
90+ articles published across JavaScript, React, TypeScript, Node.js, GraphQL, and modern web development. Over 1 million views total.
33 JavaScript Concepts
33 JavaScript concepts every developer should know. 66K+ stars and translated into 40+ languages by the community. Recognized by GitHub as a top open-source project of 2018.
Spaceship
Built the domain search platform from scratch as the sole front-end engineer. Real-time WebSocket pricing across 500+ TLDs, Beast Mode bulk search, multi-currency engine across 30+ currencies.
Shopwyse
Multi-tenant retail ERP. POS/checkout, inventory, CRM, and financial reporting. Built with TanStack Start, React 19, Elysia, Drizzle ORM, and PostgreSQL.
Polyglot
AI writing assistant that interviews you first, then drafts content in your voice from different angles. Full-stack TypeScript.
Otis Finance
Stock market API for real-time prices, SEC filings, earnings, and financials.
gone
Fast, concurrent dead link detector. Interactive terminal UI, auto-fix for redirects, and output formats for CI/CD pipelines. Written in Go.
betterhook
Git hooks manager built for parallel AI coding agent workflows. DAG-based scheduling, content-addressable cache, and streaming output via Tokio. Written in Rust.
Have something in mind? Reach out.