Erg
Built a workflow orchestrator for Claude Code. It watches your issue tracker, spins up containerized AI sessions to implement the work, creates PRs, handles review feedback, monitors CI, and auto-merges. Written in Go, available via Homebrew.
Zack Hubert
Engineering leader. Founder. Novelist. Two patents. One book. Lots of code.
Projects
Plural
Built a CLI for running parallel Claude sessions. Because sometimes you want to try three different approaches without losing your place. Written in Go, available via Homebrew.
Rush Programming Language
Built an experimental programming language from scratch using AI pair programming. Functional + OO paradigms, three-tiered execution (interpreter → bytecode VM → ARM64 JIT), and surprisingly fun to write.
Intro to Transformers
Writing a book that teaches transformer architecture from first principles. Covers building transformers, understanding gradients, and generating images from noise.
Singular
Wrote a science fiction novel called Singular. Vintage computers, artificial intelligence gone rogue, the fate of humanity.
Work
Planning Center
- Director of Engineering 2026 – present
- Senior Engineering Manager 2025 – 2026
- Software Engineering Manager 2024 – 2025
- Senior Software Developer 2012 – 2024
Leading engineering teams at Planning Center. We build tools that help churches run better.
The City
Built a social network for churches from scratch. Grew it to nearly a million users before Zondervan acquired it.
Amazon
- Manager / Senior Manager, Software Development 2004 – 2007
- Senior Website Engineer 1999 – 2004
Built pricing algorithms and anomaly detection systems before “data science” was even a thing. Earned two patents.
Los Alamos National Lab
Wrote modeling software for the Sudbury Neutrino Observatory. Very small role, but hey—the project’s chief scientist won the 2015 Nobel Prize in Physics.
