C. Lewis

@ctjlewis
JS/TS Contributor: Auth0, AWS, Google, MSFT, Netlify, Rollup, Vercel
Chicago

Node.js

TypeScript

React

React Native

Self-Taught

Remote Worker

JavaScript

Flutter

PHP

Python

CSS

Software Engineer

Open Source

AWS

Web Performance

Freelancer

Software Engineering

GitHub

Writer

Advisor

Founder

Mobile Dev

Front End Developer

Front-end Developer

Board Member

Product Design

I specialize in JS/TS, ESM-CJS interop, module bundling/compilation, pageload optimization, and frontend development (incl. React and React Native).

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I'm open to

open source contributions,

joining company boards,

advising companies,

making introductions,

speaking on podcasts,

and beta testing new products.

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Portfolio

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tsmodule TypeScript Module Toolkit Replaces tszip, allows for modular component libraries and pure ESM packages. https://github.com/tsmodule/tsmodule

tszip (deprecated) TypeScript to ESM compiler Released preview build; currently testing and iterating. Produces minified ESM with native index resolution (see README). https://github.com/tszip/tszip

Rollup Plugins Added .cjs to default file extensions for the CommonJS plugin, consistent with modern Node module resolution spec. https://github.com/rollup/plugins/pull/524

Vercel Next.js CLI Adds documentation for the new --typescript, --ts flag. https://github.com/vercel/next.js/pull/25349