matthew
karsten


builder — creator — founder, purple squirrel media

60+
Countries
1,800+
Commits
7
Languages
12+
Years Creating

My code is open.
My work speaks.

After a decade of full-time travel to 60+ countries, I turned the lens from adventure to infrastructure. Now I build decentralized media tools, ship open-source projects, and help creators own their content and audience.

I write TypeScript, Python, Rust, Ruby, Go, and whatever the problem demands. I deploy to edge networks, train models on Apple Silicon, and architect systems that don't need permission to run.

What I build

Company

Purple Squirrel Media

Decentralized video infrastructure. Mesh network CDN, AI content intelligence, blockchain-verified ownership. Kino player built in Rust.

purplesquirrel.media →
Security

Coldstar

Air-gapped Solana cold wallet. QR-code transaction signing, zero network exposure. Rust signer, CLI, distribution build system.

coldstar.dev →
Mobile

NorthCatch

Fishing companion app. Expo/React Native for iOS and Android. GPS logging, catch tracking, weather integration.

AI

ACE

AI Content Engine. FastAPI + ChromaDB + Celery pipeline for automated content processing, vectorization, and retrieval.

Toolkit

Ruby CLI Suite

16 repos, 163 CLI commands. Deploy, database, config, monitoring, QA, integrations, publishing. All symlinked to PATH.

Infrastructure

MCP Servers

cPanel MCP (47 tools, npm published), publishing MCP, dashboard MCP, file organizer. Built for Claude Code integration.

Tools I use

TypeScript Python Rust Ruby Go Solana React Native Next.js FastAPI Rails 8 Cloudflare Docker PostgreSQL ChromaDB Ollama FFmpeg GStreamer WASM Anchor Claude Code

Key moments

2014

Left the 9-to-5

Started full-time travel and content creation. Built Expert Vagabond into a leading travel brand.

2020

Shifted to building

Pivoted from pure content to infrastructure. Started writing code, shipping products, learning systems.

2025

Founded Purple Squirrel Media

Decentralized video platform. Built Kino player in Rust. Formally verified with TLA+ specs.

2025

Shipped Coldstar

Air-gapped Solana wallet. Colosseum Hackathon #62. Grant applications to DD.xyz and FairScale.

2026

Now

1,800+ commits. 7 languages. 58 TypeScript projects, 16 Ruby repos, 7 Rust crates. Building from Tulum.

Let's build something