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Building.
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Building.
3.2k followers · 303 following

Achievements

Achievement: QuickdrawAchievement: Pair Extraordinairex3Achievement: YOLOAchievement: Pull Sharkx3Achievement: Arctic Code Vault ContributorAchievement: Starstruckx4

Achievements

Achievement: QuickdrawAchievement: Pair Extraordinairex3Achievement: YOLOAchievement: Pull Sharkx3Achievement: Arctic Code Vault ContributorAchievement: Starstruckx4

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Organizations

@react-brasil

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leonardomso/README.md

👋 Hi

My name is Leonardo Maldonado. Software engineer from Brazil, based in Valencia, Spain. I work with JavaScript, React, TypeScript, Node.js, and Go. Creator of 33 JavaScript Concepts — 66K+ GitHub stars, translated into 40+ languages, recognized by GitHub as a top open-source project of 2018.

About me

  • 7+ years building for the web, from early-stage startups to international product companies.
  • 100+ published technical articles on JavaScript, TypeScript, React, and Node.js across LogRocket and Progress.
  • I like building side projects and I'm always learning new things.

Projects

I like to build things and learn by doing. Here are some of my projects:

  • 33-js-concepts — Every JS concept you need to know. 66K+ stars, community translations in 40+ languages.
  • Shopwyse — Full-stack multi-tenant ERP for retailers. POS, inventory, CRM, and financial reporting.
  • Polyglot — AI-powered writing assistant. Guided interviews, multiple draft angles, content refinement in your voice.
  • Otis Finance — Stock market data API. Real-time prices, SEC filings, earnings, and financials.
  • gone — Fast, concurrent dead link detector for files.
  • rust-skills — A collection of 179 rules that AI coding agents can use when writing Rust.
  • betterhook — Fast, worktree-native git hooks manager built for parallel AI coding agents.

Get in touch

Pinned Loading

  1. 33-js-concepts 33-js-concepts Public

    📜 33 JavaScript concepts every developer should know.

    JavaScript 66.3k 9.2k

  2. gone gone Public

    Fast, concurrent dead link detector for files.

    Go

  3. rust-skills rust-skills Public

    A collection of 179 rules that AI coding agents can use when writing Rust.

    147 19

  4. betterhook betterhook Public

    Fast, worktree-native git hooks manager built for parallel AI coding agents.

    Rust