Peter Rallojay

Peter Rallojay

Founding engineer and engineering leader in San Francisco. 0→1 across AI infra, devtools, and mobile.

About

Most recently a founding engineer at Mesa, building MesaFS, a filesystem for AI agents. Built Mesa Code Review, an LLM code-review agent used by 300+ teams.

Before that, I co-founded Fastro (AI analytics for commercial real estate), led engineering at EyeTell (an AI video creation platform), managed a 21-engineer platform org at Mythical Games ($166M+ in marketplace sales), and scaled engineering at GreenPark Sports from 2 to 12 (acquired by JOA in 2025).

Day-to-day across the stack: TypeScript (web, API, SDKs), Rust and Python (data pipelines and processing). Postgres for anything that matters; I pick the rest based on the problem.

Tools I built

sqlite-utils-jev open source · MIT

Automatically categorize text in SQLite with Jev, for tasks like routing support tickets. Saves results locally, resumes interrupted jobs, and tracks API costs.

Claude Concise open source · MIT

Less filler. Clearer answers. A lightweight Claude Code hook that automatically gives each response one editing pass for concision and clear technical English.

Saguaro Code Review open source · Apache 2.0

Local-first code-review harness for Claude Code, Codex, and Cursor. CLI, stop hook, and background daemon modes.

Writing

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GitHub

Peter Rallojay's GitHub contribution graph