Building the systems that scale from zero to >100B GTV. Former CEO @ UBX. Astrophysicist turned builder. Building ventures & guiding boards/leaderhsip teams on AI, Fintech & Energy Transition.
I create AI-native tools and infrastructure that turn chaotic workflows into durable, version-controlled knowledge. Current obsessions: agentic systems, markdown-first everything, and developer tools that actually ship.
- margo: Lightning-fast, Hugo-inspired Go CLI that turns pure Markdown into beautiful, scriptable slide decks for developers and AI agents.
- crm-llm: Agentic AI-powered, markdown-native CRM. Turns Google Workspace activity into a durable Git-versioned knowledge base with specialized LLM agents.
- google-drive-email-extension: Chrome extension that lets you right-click any Google Drive file and instantly create a Gmail draft with the file attached.
- freshdeskr: Clean, idiomatic R package wrapping the Freshdesk API — built as a practical example of modern R package development with devtools, testthat, and CI.
- homebrew-margo: Official Homebrew tap for one-command installation of Margo.
- Deterministic Evals: Hardening AI Skills for Production
- From CRM App to LLM Knowledge Base: A Markdown-Native CRM for the Agent Era
- Investing in Atoms: How AI is Forcing Venture Capital to Break its Software Addiction
- Website & Lab → januszczak.org
- X → @johnjanuszczak
- LinkedIn → johnjanuszczak
Currently exploring agentic workflows, local-first tools, and the next generation of fintech infrastructure. Always happy to chat about building at the intersection of AI, capital, and physics-level rigor.