Co-founder/CEO of @convex. Former Sr. Director/Principal Engineer of Storage & Databases at Dropbox. Shameless startup junkie.

Seattle, WA, USA
Joined April 2009
Jamie Turner retweeted
Run, do not walk, from any cloud provider who is throwing public shade at Railway (or any other provider). The better your security team is, the more internal pressure you have not to mouth off about security in Q4 2026.
9
37
5
456
14,996
175% agree with this. we've just sped up the discovery of software which wasn't quite right all along.
150% agree with this, and I said so publicly before in conferences, and here too. The truth of the matter is we, as an industry, are painfully aware of the many ways in which we do things that suck. We know the issues exist but we bank on the fact that the economic incentives to exploit them are not there. Well, now they are.
5
4
29
4,670
Live at 11a PT. It's been a quiet few days in the tech world, so not much to talk about... 😜 Come say hi.
1
21
1,118
Jamie Turner retweeted
software engineering is now 1% writing code and 99% gaining confidence that the code is correct
1
2
1
15
672
Yesterday the software industry learned a hard lesson. At @convex, we've rotated all random numbers. They are no longer 4. We will not be disclosing the new number.
21
3
1
303
14,602
imagine if I had shipped this to convex customers
15
3,732
today in engineering-is-dead land
8
2
2
90
41,555
we already don't talk to each other enough
This is bad for humankind as a whole X 0head take> "BUT PRIME, THINK ABOUT THE LONELY PEOPLE" This will only serve to create a greater chasm betwixt the lonely and the rest. This will create an entire lonelier generation. AI's super danger is that it creates in you more and more selfish longings whether you realize it or not. This shit is dangerous and evil.
2
17
1,666
Okay I finally permanently changed my coding harness. This one has stuck. I'm no longer on opencode. I'm on opencode 2.
20
1
236
10,863
If a @convex optimized fine-tuned model as smart as kimi, but 2.5x as fast and 30x cheaper would be interesting to you, lmk. Maybe these will start appearing in the Convex AI gateway soon.
20
2
1
140
6,875
I'll be playing with a new set of evals based on what we've learned about successful architectures in the near future. We can fine tune cheap models to be near SOTA with everything we know about how to use Convex's building blocks (primitives, components) to maximize success.
2
12
556
This is the version of the labs I want. Would love to pay them to create derivative models.
And interesting frontier lab strategy would be to encourage distillation, set price that mass distillation is unit economic positive, and then just focus on building the best models. This results is a downstream ecosystem addicted to you. And with no capability to surpass.
1
23
3,094
The vast majority of VCs are downside protecting, not upside seeking. They’re not looking for an outlier, they’re looking for a “consensus outlier” that’s the same “crazy” bet everyone else is making. Then you don’t stand out and get fired in the next downturn when LPs pull their money. Nothing wrong with that except when VCs pretend to be anywhere near as bold or visionary as founders. That’s horseshit. This is a big part of why most of the best VCs are ex founders. They know exactly how crazy that path is. They don’t pretend to know things they don’t, and they take only the appropriate share of credit for portco success. Those VCs are wonderful to work with.
In the summer of 2023, my friend @benspector, who co-founded Anysphere (aka Cursor), reached out to one top venture funds in Silicon Valley, suggesting we meet. They turned down the intro, saying it wasn’t a category they were interested in. Ben insisted that he thought our team was special and that they had to meet us, but the partner still wouldn’t even take a meeting. I drove over to their office on Sandhill Road and left a note at the front desk saying: “I think you couldn’t be more wrong. This is the largest opportunity of the 21st century.” They ignored my note, and I never heard back. My cofounders were still enrolled and left torn as to whether they should drop out with no funding. We ended up taking the leap of faith and building the fastest-growing company in history. It was a valuable lesson in persistence and why not to listen to investors. The best startups are deeply contrarian.
3
1
1
48
3,208
agents are really good at generating code they're not good at generating the right code they generate too much code and seldom delete code you can fix it with abstractions, feedback, and architecture put them in boxes that make bad code impossible then win-win-win
18
4
2
128
4,983
I'm sorry, y'all, AI is still so dumb. I just spend all my "development" hours now just telling this dimwit it missed another detail or screwed something up and burned a lot of tokens while doing it. I'm sure this is progress, but it feels very silly sometimes.
11
63
5,090
LLMs are completely unafraid and they value their time at zero. If you tell Claude to use this instead of that, it doesn't say no or ask why or wonder if it will be "worth it." Getting a large group of humans to change behavior requires real visceral pain—there has to be a compelling reason or it won't happen. Most people just want today to go like yesterday. But give an LLM a skill file and the behavior changes instantly. That makes innovation much easier.
9
1
2
57
3,982
Property testing practices and package installs are tracking almost exactly with agentic engineering adoption over the last 18 months. They give your agent more feedback about what your system should do and what success and failure mean.
2
1
17
1,588
Jamie Turner retweeted
accidentally left my duckdb ingest script on an infinite loop now it's foie gras db
1
3
34
1,291