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@alexvcasillas

Alex Casillas

alexvcasillas
Córdoba, Spain

👋 Hi, I'm Alex

Alex Casillas' Cat named Ruso

Core Tiptap engineer based in Spain 🇪🇸 — building software products, tools, and open-source. Self-taught developer with a strong product mindset and a passion for scalable systems, performance, and developer experience.

Find me online

I have a 😸 cat —a Bombay called Sirius (2). He supervises most of my coding sessions.

💼 Open Source & Professional Work

✍️ Tiptap — Rich Text Editor Framework (Core Contributor)

I’m a core contributor at Tiptap, one of the most popular open-source rich-text editor frameworks used by thousands of developers and companies worldwide.

Tiptap powers modern text editing experiences across SaaS products, documentation tools, and collaborative platforms. My work focuses on editor architecture, extensions, performance improvements, and developer experience.

→ https://tiptap.dev

🚀 Live Products & Tools

📊 Pulsora — Anonymous Analytics

A privacy-first, cookie-less web analytics platform built as a lightweight alternative to Google Analytics.

Pulsora focuses on:

  • Anonymous traffic tracking
  • GDPR-friendly data collection
  • No cookies or invasive fingerprinting
  • Simple dashboards and actionable insights
  • Fast, minimal scripts for modern websites

Designed for founders, indie hackers, and product teams who want useful analytics without sacrificing user privacy.

⚡ curl-runner

A modern CLI tool for managing and running HTTP requests using YAML configuration files.

curl-runner makes API workflows reproducible and automation-friendly:

  • Define requests declaratively
  • Run collections of endpoints easily
  • Ideal for API testing, scripting, and CI pipelines
  • Built on Bun for speed and performance

Perfect replacement for scattered curl commands and ad-hoc scripts.

📦 Cratebox.io — Open Source

A fast global CDN for NPM registry assets.

Cratebox allows you to instantly retrieve any public package file using a simple URL pattern:


cratebox.io/:package@:version/:file

Optimized for performance, caching, and developer convenience.

📚 Published Courses

Newline Guide to Building a React App with MobX State Tree

A complete hands-on course covering:

  • Application architecture
  • Centralized state management
  • Async actions and snapshots
  • Performance optimization with observers
  • Production-ready React patterns

Focused on building scalable React apps with clean state design.

📘 Published Books

The JavaScript Cooking Book: Node.js

A practical guide to building server-side applications and CLI tools with Node.js — from fundamentals to real-world use cases.

The JavaScript Cooking Book

A beginner-friendly introduction to JavaScript fundamentals, syntax, and core programming concepts.

Thanks for stopping by — let’s build great software 🚀

1 sponsor has funded alexvcasillas’s work.

@alexvcasillas

I'd like to be able to maintain https://www.curl-runner.com infrastructure and continue developing amazing features :)

@thaothompsonpp5r

Featured work

  1. alexvcasillas/animated-styled-components

    React Animated Styled Components

    JavaScript 138
  2. alexvcasillas/cratebox

    A global, fast content delivery network for NPM

    TypeScript 19
  3. alexvcasillas/react-onboarding

    Onboarding library for React

    TypeScript 67
  4. alexvcasillas/use-observer

    React Intersection Observer implementation done right!

    TypeScript 2
  5. alexvcasillas/graphdb

    An in-memory database with sync capabilities. Zero runtime dependencies. Bun-first.

    TypeScript 4
  6. toptal/picasso

    Toptal UI components library

    TypeScript 137

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