Co-founder of Instagram. Anthropic's chief product officer for two years, then moved into an individual contributor role at Anthropic Labs, the team that incubates experimental products.
Why their word counts: Works inside Anthropic Labs and was Anthropic's chief product officer, so he describes how the team builds and reviews work from the inside. Anthropic sells AI products, so his account of its own practice is first-party.
Profile from this source , checked 2026-10-30 .
Photo: Mike Krieger, Wikimedia Commons , CC BY-SA 4.0 .
“ if you align the org chart too much to the individual projects, you're going to end up re-orging every two weeks, which would be a total nightmare. … And there is the concept of a bet lead or a directly responsible individual. But the interesting thing is that they don't manage usually any of the other people, which … breaks the … previous way in which a lot of these things were done. But I think it leads us to be really flexible when you say, OK, actually, this project is not going to work out. Let's disband and keep going, and it's not a big deal.” Mike Krieger Head of Anthropic Labs · Leader ,
Context. Continuing his answer on how Anthropic Labs is structured; 'bets' are the project teams inside Labs.
Interview: How Anthropic Builds: Lessons from Labs , AI Engineer (YouTube) , July 2, 2026, at 12:46 .
[ Grade C ] Said in the last year Anthropic: $47 billion revenue, run-rate, May 2026 Sells AI tools Passage page
“ We are definitely still bottlenecked on reviews, especially for things that are touching some architecture pieces. And it's actually more subtle than just being bottlenecked on review, … we can carve out time differently. It's … bottlenecked on human ability to even fully conceptualize what we're doing.” Mike Krieger Head of Anthropic Labs · Leader ,
Context. Answering a question from the host on whether code review is a bottleneck and whether code could be merged without a person looking at it.
Interview: How Anthropic Builds: Lessons from Labs , AI Engineer (YouTube) , July 2, 2026, at 10:13 .
[ Grade C ] Said in the last year Anthropic: $47 billion revenue, run-rate, May 2026 Sells AI tools Passage page
“ I was like, OK, I need to port this whole thing from Python to TypeScript. Like, as a-- you know, if I put on my, like, 2010s engineering hat, or even my early 2020s, like, that's a dumb idea. … But I was like, I think this is doable now. And I basically created this dynamic workflow set up. And over the weekend, … port the whole thing, like, verify it, double check it, … and then came back Monday to complete a workflow that was a ported version of that thing.” Mike Krieger Head of Anthropic Labs · Leader ,
Context. Describing a Labs project he moved from Python to TypeScript, in answer to a question on being more ambitious with prompts.
Interview: How Anthropic Builds: Lessons from Labs , AI Engineer (YouTube) , July 2, 2026, at 4:38 .
[ Grade C ] Said in the last year Anthropic: $47 billion revenue, run-rate, May 2026 Sells AI tools Passage page
“ actually talked to Claude about the code and say, all right, these are the questions that I would have. Can you go investigate it? So it is kind of … code review, but still human-driven, and for the really important ones. And for the ones that are cosmetic visual changes, it's much more like we'll fix forward if we need to fix forward.” Mike Krieger Head of Anthropic Labs · Leader ,
Context. Continuing his answer on review. The sentence before this passage, on not reviewing every line of a pull request, is not quoted because the two passes disagreed on its wording.
Interview: How Anthropic Builds: Lessons from Labs , AI Engineer (YouTube) , July 2, 2026, at 11:13 .
[ Grade C ] Said in the last year Anthropic: $47 billion revenue, run-rate, May 2026 Sells AI tools Passage page
“ We have one of our Slack challenges, like Project Unship, which is like, what is in the product right now? … Like, we unshipped styles, I think, recently, … used by a small percentage of people … very, sort of, prescriptive in the way that it worked, and skills were a much better application, something like that.” Mike Krieger Head of Anthropic Labs · Leader ,
Context. Answering a question on what Anthropic would delete from its products.
Interview: How Anthropic Builds: Lessons from Labs , AI Engineer (YouTube) , July 2, 2026, at 15:43 .
[ Grade C ] Said in the last year Anthropic: $47 billion revenue, run-rate, May 2026 Sells AI tools Passage page
“ But most usage is actually much more delegating via tagging… And then more advanced version is really trying to think of it as a teammate that is actually … has memory and can be proactive. And that's just really changed how we operate internally. It's much more like this multiplayer async proactive way than it is most people off in their own CLIs.” Mike Krieger Head of Anthropic Labs · Leader ,
Context. Describing how people at Anthropic work with Claude. The recording's transcripts render the name of what is being tagged unclearly, so the passage is cut at 'tagging'.
Interview: How Anthropic Builds: Lessons from Labs , AI Engineer (YouTube) , July 2, 2026, at 8:57 .
[ Grade C ] Said in the last year Anthropic: $47 billion revenue, run-rate, May 2026 Sells AI tools Passage page
“ So one of the reasons we built … artifacts that we shipped a couple of weeks ago was partially for that, which is you would send somebody a PR, and then they'd be like, I don't know, man, this is like 2000 lines of code. It looks like code to me. And what we started doing instead is sharing much more like, here's a … artifact. Here's the explanation. Here's the intention of the change. Here's the trade-offs that were made.” Mike Krieger Head of Anthropic Labs · Leader ,
Context. Continuing his answer on review bottlenecks. The product name before 'artifacts' is rendered unclearly in the recording's transcripts, so the passage is cut around it.
Interview: How Anthropic Builds: Lessons from Labs , AI Engineer (YouTube) , July 2, 2026, at 10:30 .
[ Grade C ] Said in the last year Anthropic: $47 billion revenue, run-rate, May 2026 Sells AI tools Passage page
Mike KriegerHead of Anthropic Labs · Leader, 
Anthropic