About
Joseph Ruscio is a software engineer who builds scalable, fault-tolerant, distributed systems. He helped found Librato, where he continued to work as an engineer, and he writes technical blog posts on topics like setting up APT repositories, LVM disk resizing, and installing git on CentOS. He also authored and released an open-source Ruby "Aggregate" statistics gem for streaming histogram-based stats. He is based in San Francisco.
Joseph Ruscio @josephruscio
It’s simple math. There is no world in which we have enough human bandwidth to review all agent-generated code. We might as well try to stop the sun from rising tomorrow. The only question is which code still warrants human review, and at what intervals and chokepoints. https://t.co/MU0LI3hf7w
Jul 25, 2026 · ♥ 7
Joseph Ruscio @josephruscio
Sometimes a picture truly is worth 1000 words. https://t.co/Qk84sngk0K
Jul 25, 2026 · ♥ 7
Joseph Ruscio @josephruscio
Now Fable I can get into ☕️ https://t.co/1VOw0XsbBy
Jul 25, 2026 · ♥ 2
Invests in
AI & Machine LearningCybersecurityData & InfrastructureDeveloper ToolsEnterprise Software
Beyond investing
- Founded
- Helped found Librato, where he continues to work as an engineer.
- Hobbies
- Enjoys running, snowboarding, and home-brewing in his spare time.
- Pets
- Has cats.
- Family
- Lives in San Francisco with his wife Jory and their cats.
- More
- Authored and released the open-source Ruby 'Aggregate' statistics gem.
From Joseph's own website — common ground for a warm intro.
Deals · 5
Devenue Inc.Board seat
via Heavybit · filed Jun 2026 · $11.3M raise
L9 Labs Inc.Board seat
via Heavybit · filed Dec 2025 · $6M raise
Exceptional, Inc.Board seat
via Heavybit · filed Nov 2023 · $3.2M raise
Streamfold, Inc.Board seat
via Heavybit · filed Nov 2022 · $3.2M raise
Highly Valued, Inc.Board seat
via Heavybit · filed Feb 2022 · $3.7M raise
Attribution from SEC filings, press coverage, and firm rosters.
Colleagues at Heavybit
Network1
Investors connected to Joseph in public investor directories — a warm-intro map.