Frontend technologies
CSS- 19 projects
A style sheet language used for describing the presentation of a document written in a markup language like HTML.
TypeScript- 19 projects
A strongly typed programming language that builds on JavaScript, giving you better tooling at any scale.
ReactJS- 17 projects
A JavaScript library for building user interfaces, maintained by Facebook and a community of individual developers and companies.
JavaScript- 16 projects
A high-level, just-in-time compiled, object-oriented programming language.
Tailwind CSS- 12 projects
A utility-first CSS framework for rapid UI development.
GraphQL- 7 projects
A query language for your API, and a server-side runtime for executing queries by using a type system you define for your data.
Next.js- 6 projects
A React framework for production, providing hybrid static & server rendering, TypeScript support, smart bundling, route pre-fetching, and more.
React Native- 6 projects
A framework for building native apps using React.
ShadcnUI- 4 projects
A collection of beautifully designed components built with Radix UI and Tailwind CSS.
TanStack Query- 4 projects
Powerful asynchronous state management for fetching, caching, and updating data in React applications.
AngularJS- 3 projects
A structural framework for dynamic web apps.
Bootstrap- 3 projects
A free and open-source CSS framework directed at responsive, mobile-first front-end web development.
nuqs- 3 projects
A type-safe URL query state management library for Next.js applications.
Expo- 2 projects
A set of tools and services for React Native development.
Mootools- 2 projects
A compact, modular, Object-Oriented JavaScript framework designed for the intermediate to advanced JavaScript developer.
Redux- 2 projects
A predictable state container for JavaScript apps, helping you write applications that behave consistently.
Wagmi- 2 projects
A collection of React hooks for Ethereum.
Data Charts- 1 project
Tools and libraries for creating interactive and dynamic data visualizations.
LESS- 1 project
A backward-compatible language extension for CSS.
Stitches- 1 project
A CSS-in-JS library with near-zero runtime, SSR support, and a great developer experience.
TanStack Form- 1 project
A React form library with hooks for state and validation.
TanStack Start- 1 project
A starter kit for building modern web applications with TanStack libraries.
ViroAR- 1 project
ViroAR is a React Native platform for building cross-platform AR applications, offering tools for interactive 3D experiences.
WebGL- 1 project
A JavaScript API for rendering interactive 3D and 2D graphics within any compatible web browser.
Zustand- 1 project
A small React state library with a hook API and little boilerplate.
Writing about Frontend
AI Agents are Infrastructure
May 20, 2026
Managed and self-hosted AI agents, agentic infrastructure, and why the runtime around the model matters more than benchmarks alone.
Intersection of AI and Web3 (Part 2)
November 13, 2025
Agentic finance, stablecoin rails, and decentralized AI infrastructure after a year of building at the intersection.
Why I still use Expo
October 1, 2025
OTA updates, EAS cloud builds, and shared TypeScript from production React Native work.
Agentic Finance
September 30, 2025
A deep dive into how AI agents are becoming autonomous financial actors with the ability to transact, execute, and move capital
AI Model Context Protocol (MCP)
June 8, 2025
Exploring the Model Context Protocol (MCP) for standardizing AI model interactions using TypeScript
RAG with TypeScript
June 2, 2025
TypeScript implementations of Retrieval-Augmented Generation (RAG) systems for integrating external knowledge with language models
The Skillset of a Product Engineer
March 25, 2025
Exploring the role of a product engineer
EVM on Bitcoin - The Future of DeFi
March 17, 2025
Bitcoin DeFi evolves with EVM, unlocking new financial possibilities.
The Power of Bitcoin Runes
March 2, 2025
How Bitcoin Runes is transforming tokenization with scalability and real adoption
Engineering Principles
February 25, 2025
Engineering principles for building scalable and maintainable systems
Math in JavaScript and DeFi
January 19, 2025
Best Practices for Math in JS & DeFi
useMemo and useCallback Are (Mostly) Obsolete
January 17, 2025
Why useMemo and useCallback hooks are becoming obsolete in modern React applications
React Fractal Compoundnents
November 25, 2024
Modular Design for a Compounding Effect
Modern Next.js Web3 Architecture
October 1, 2024
URL state, collocation, React Query, wagmi, and viem in Next.js Web3 apps.
Introducing BasilicEVM
August 15, 2024
FullStack EVM Project Starter with 0x and Codex integration
Architecture Decision Records
July 20, 2024
How Architecture Decision Records improve communication and efficiency in software teams
Comparing Ethers.js and Viem/Wagmi
July 20, 2024
A comparative analysis of Ethers.js and Viem/Wagmi in Ethereum development
The Intersection of AI and Web3
July 7, 2024
A July 2024 snapshot of shared infrastructure between AI and Web3: compute, identity, data, and open networks.
Async Patterns in React (PolkadotJS)
September 5, 2023
Async Patterns for maintaining a clear separation between core logic and presentation.
Conventions for React Apps
January 29, 2023
File naming, collocation, state, and structure I use in React apps.
TypeScript Generation from GraphQL
January 19, 2020
Generate TypeScript from a GraphQL schema with Codegen
Enhancing Your GitHub Workflow
August 8, 2018
Tips for improving your GitHub workflow in software development.
Nodeschool International Day 2016
June 7, 2016
JavaScript and Node.js through in-person workshops
Paintball.js recap
May 30, 2016
At Costa Rica JS this time we broke the mold a bit and went to Under Fire Paintball territory.
Best Practices for Designing RESTful APIs
October 3, 2015
When designing an API, there are important decisions that have a great impact on the way other applications will interact with the service...
Automatic Node.js Version Switching
July 18, 2015
When working on multiple Node.js projects it is important to configure your development environment to automatically switch to right node version for a particular project.
On Continuous Delivery
July 10, 2015
Continuous delivery is practice in software development in which development teams work in a way that allows companies to update their systems at any point in time or continuously through automated processes, the system's code base is always deployable and tested.
Unit Testing - Mocks, Stubs and Spies
September 15, 2014
Understanding mocks, stubs, and spies in unit testing
Introduction to Unit Testing
September 1, 2014
Getting started with unit testing in JavaScript
NodeJS HTTPS and SSL Certificate for Development
August 15, 2014
Setting up HTTPS and SSL certificates for Node.js development
Introduction to Gulp.js
April 15, 2014
Getting started with Gulp.js build system
Developing Software in Costa Rica
January 15, 2014
The software development ecosystem in Costa Rica
Data Visualization in Costa Rica
August 1, 2013
Data Visualization meetup in Costa Rica
My Favorite JavaScript and Engineering Podcasts
December 22, 2012
Simply the best Javascript podcast out there.