Sage Haven chat platform
Messaging built for kids and the parents watching over them — architected from nothing, down to the watchOS client and the Terraform that ships it.
ST. AUGUSTINE, FLORIDA
Michael Hohlios.
Twenty years in software, from first engineer to founding CTO. I’ve grown teams from five to sixty, led one business through two acquisitions, and shipped AR and ML products to enterprise customers. Today I’m founding CTO at Sage Haven. On the side, I run Vyttle, a small studio for privacy-first apps and developer tools.
$ uptime — 20 years · 4 companies · 2 acquisitions
01
Work
Work
AR virtual try-on
Eyewear try-on engine and SDKs — six products, 50+ engineers, one patent. Acquired by 1-800 Contacts in 2022; sold to Fittingbox in 2023.
FilmArray diagnostics
Software and UI built from nothing for BioFire’s multiplex PCR system, carried through FDA 510(k) clearance.
02
Career
Career
2024—Now
Sage Haven
Founding CTO
⌁ 0 → 1
2016—2024
Ditto → Luna (1-800 Contacts)
Sr. Engineer → VP Eng → Head of Engineering, U.S.
⎇ 5 → 60+ · ACQUIRED ×2
2012—2016
MetaSource
Senior Software Engineer
~ CI/CD
2006—2012
BioFire / Idaho Technology
Software Engineer
i FDA 510(k)
03
OSS
OSS
Wiffletree
a native Mac workspace where Claude & Codex agents work as a team · creator · MITGive one coordinator a goal. It plans the work, staffs each repository with its own ticket and worktree, and reports back with tested branches. Rust and GPUI, durable messaging between agents, and you stay the one who approves and merges.
Rust · GPUI
macOS · Apple Silicon
Claude + Codex
HOW A GOAL MOVES
■ coordinator — plans, asks you once
■ ticket — one repo, one worktree
■ implementer — writes the change
■ tester · reviewer — verify it
■ you — accept and merge
Celadon · MIT
A sage-green theme family for terminals, generated from OKLCH with contrast gates. This site is wearing it. celadontheme.com ↗
Reviso · Apache-2.0
Local pre-PR code review that catches AI slop — a Claude Code plugin. github ↗
termic · contributor · AGPL-3.0
Run claude, codex & more in parallel git worktrees. termic.dev ↗
04
Special projects
Special projects
Vyttle
small by designA spare-time studio for intentionally small, privacy-first apps. No accounts, no tracking, no servers.
vyttle.com ↗Sixteen to One
A coffee ratio calculator that does one thing well — water, coffee, ratio, done.
Pica
Puzzles, one cell at a time.
05
Toolkit
Toolkit
TECHNICAL
Go · Python · TypeScript · C#/.NET · Terraform · AWS · GCP · CI/CD · GitHub Actions · Jenkins
DOMAINS
AR/ML · Computer Vision · SaaS B2B · B2C · Healthcare Tech · Mobile/watchOS
LEADERSHIP
Talent Development · Remote Teams · ISO 27001 controls · GDPR · enterprise security audits · M&A Integration · Stakeholder Comms · Strategic Planning