Skip to content

OpenAI Eng & Dev Tools Founder: How Software Engineering Is Changing | Charlie Marsh

June 22, 2026 · 1 h 23 min

Show notes

Charlie Marsh is the founder of Astral, the Python devtool startup that was acquired by OpenAI. I inteviewed him about how software engineering is changing and learnings from starting his own company as an engineer.


• My ergonomic keyboard project I mentioned, you can follow along here: https://read.compose.llc/

• The Kickstarter page for it: https://www.kickstarter.com/projects/ryanlpeterman/compose-simple-ergonomics-beautifully-done


Podcast links:


• YouTube: https://youtu.be/Iw65FD4MGgs

• Apple: https://podcasts.apple.com/us/podcast/the-peterman-pod/id1777363835

• Transcript: https://www.developing.dev/p/openai-eng-and-dev-tools-founder


Thank you to this episode's sponsor for supporting my work:


• WorkOS: makes your app Enterprise Ready with easy to use APIs to add SSO, SCIM, RBAC, and more in just a few lines of code, check them out at https://workos.com/


Timestamps:


(00:00) Intro

(00:40) Origin story

(06:04) The front page of Hacker News

(14:35) Why he chose Rust

(20:10) Full codebase migration from Zig to Rust

(28:40) LLM generated code and open source

(35:34) Performance optimizations

(44:54) Optimization with AI and combating slop

(01:02:08) Learnings as an eng starting a company

(01:17:55) Top technical talk recommendation

(01:18:56) Advice for his younger self

(01:22:00) Outro


Where to find Charlie:


• LinkedIn: https://www.linkedin.com/in/marshcharles/

• GitHub: https://github.com/charliermarsh

• X/Twitter: https://x.com/charliermarsh


Where to find Ryan:


• Newsletter: https://www.developing.dev/

• X/Twitter: https://x.com/ryanlpeterman

• LinkedIn: https://www.linkedin.com/in/ryanlpeterman/

• Threads: https://www.threads.com/@ryanlpeterman

• Instagram: https://www.instagram.com/ryanlpeterman

• TikTok: https://www.tiktok.com/@ryanlpeterman


Referenced in this episode:


• Python tooling could be much, much faster: https://notes.crmarsh.com/python-tooling-could-be-much-much-faster

• The coolest PR he's ever seen: https://github.com/astral-sh/uv/pull/789

• Andrew Kelley’s data-oriented design talk: https://www.youtube.com/watch?v=IroPQ150F6c

• Ruff: https://github.com/astral-sh/ruff

• uv: https://github.com/astral-sh/uv

• ty: https://github.com/astral-sh/ty

• Salsa: https://github.com/salsa-rs/salsa

All episodes of The Peterman Pod

Settings

Display

Language

Decides which stations you see first on the home page.

History

Recently played stations and episodes and your latest searches are only stored in this browser.

Notifications

A short notice when a podcast you follow has a new episode. Turn off single podcasts with the bell on their page.

Account

Save favorites – in the app and on the website.

Keyboard shortcuts

/
Open search
Space
Play or pause
← →
In the player: back 15 s, forward 30 s (episodes) · in a row: next tile
↑ ↓
In a row: target within the tile
Home / End
In a row: first or last tile
Esc
Close window or menu
?
This overview
Now playing

Go to station page

Play next

    Add episodes with “Play next” – they play after the current episode.