Hi, I'm Hernan Alvarado (halvaradop).
Frontend Engineer & TypeScript Developer based in Colombia.
I build type-safe, performant, and developer-focused web experiences using Next.js, TypeScript, and modern Web APIs. Driving adoption of modern Web standards and type safety through open-source contributions to Auth.js and creation of the Aura Stack ecosystem.
October 2025 - Present
A modular, framework-agnostic authentication library inspired by Auth.js, designed to implement secure and fully type-safe OAuth 2.0 flows using a robust cookie-based strategy.
October 2025 - Present
A modern, TypeScript-first router and endpoint definition library that provides automatic type inference and first-class middleware composition. Ensures seamless compatibility with Next.js, Nuxt, and SvelteKit by returning native Response objects.
November 2024 - Present
A preset of utility classes (animations/utilities) designed to efficiently extend default Tailwind behavior. Demonstrates specialized knowledge in CSS frameworks and front-end styling optimization.
November 2024 - Present
A lightweight package publishing 70+ advanced TypeScript utilities for deep object transforms and numeric/string logic. Drastically improves autocomplete, inference accuracy, and developer confidence in large TypeScript codebases.
November 2024 - Present
Created a reusable, themeable component library of 10+ accessible, composable components using advanced patterns (Slot, Compound, Dot). Integrated Turborepo to optimize workflows and reduce build times by 30%.
January 2025 - Present
Collection of 10+ common React hooks for efficient component logic abstraction.
Frontend Software Engineer (Freelance)
December 2024 - July 2025