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Mark Kalman

@marmars

Blob of organized mud that likes to eat tacos. Formerly engineering lead for media on here.
San Francisco Joined April 2008
1.5K Following 7K Followers 223 Posts

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Mark Kalman @marmars
Hey all, this is what I’ve been working on since leaving X last year. I’m really proud of what we’ve built (so far!). Check it out!
Kayvon Beykpour Verified account @kayvz Sep 17, 2025
excited to share what I’ve been up to:

today, we’re launching @Macroscope: an AI system that uses your codebase to answer questions about what’s happening and automatically reviews your PRs for bugs. we raised a $30M Series A led by Lightspeed & Thrive Capital, Adverb and GV.
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