How Holepunch Is Redefining Peer-to-Peer Apps with Bare.js — A New Era for JavaScript Developers -JSJ 681

In this episode, we sit down with Mathias Madsen, CEO of Holepunch, and take a wild ride through the cutting edge of peer-to-peer JavaScript development. Mathias shares his journey from accidentally discovering JavaScript in college to becoming a prolific contributor with over 1,500 open source modules. His passion? Building decentralized, peer-to-peer systems where JavaScript isn’t just for the browser—it powers the entire stack.

We dive deep into how Holepunch is reimagining application distribution with their Pear system —essentially turning peer-to-peer into a first-class citizen for distributing full applications, not just files. No hosting, no servers — just apps shared directly, BitTorrent-style. And because packaging and distributing Node-based apps can be painfully complex, they took things a step further by building a new runtime: Bare.js

Bare.js is refreshingly "bare": it strips away the heavy, opinionated APIs bundled into Node or Deno, leaving just the JavaScript core and a powerful module system. What’s revolutionary here is Bare's ability to run the same codebase across desktop, mobile, and even tiny embedded devices—swapping out engines like V8, JavaScriptCore, or JerryScript depending on the platform's needs. This allows Mathias' team to write backend logic once, share it across all platforms, and iterate at lightning speed.

Key takeaways:
-Peer-to-peer can go far beyond media sharing — it's being used for full app distribution.
-Bare.js decouples JavaScript from specific platforms, creating a universal backend that just works anywhere.
-Modular design isn't just a philosophy — it's the secret to Holepunch’s rapid development pace.
-The combination of React Native for UI and Bare.js for backend creates an insanely productive development pipeline, fully cross-platform.


If you’re into JavaScript, peer-to-peer tech, or just love hearing about developers breaking the mold, this one’s for you.


About the Guest

Mathias is the CEO of Holepunch (https://holepunch.to/). He brings his passion for open-source software, and deep experience in the area, having  published more than 1000 modules to npm, the Node.js package manager, totaling billions of downloads every month.

Mathias Buus is a self taught Javascript hacker from Copenhagen. He works full time on open source projects and has been working with Node.js since the 0.2 days. Mathias likes to work with P2P and distributed systems and is the author of more than 550 modules on npm, including some of the most popular ones for working with streams. In addition he has spoken about mad science projects at various conferences around the world.

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