Intelligence and Interfaces Eng Lead @CashApp

Joined June 2009
196 Photos and videos
Pinned Tweet
8 Aug 2025
We are uncovering better ways of developing software by doing it and helping others do it. 
Through this work we have come to value: - Individuals and interactions over processes and tools 
- Working software over comprehensive documentation 
- Customer collaboration over contract negotiation 
- Responding to change over following a plan That is, while there is value in the items on the right, we value the items on the left more.
1
11
2,440
Jun 13
I didn’t like fabel anyway
1
57
gertig retweeted
Meet Cash App Mobile*: unlimited 5G on AT&T's network for $40 a month, taxes and fees included. No contracts, no credit checks, and no store visits. Manage your phone plan right next to the rest of your money. Rolling out now 💚 cash.app/download
164
188
1,339
2,251,188
gertig retweeted
introducing ... < CASH APP MOBILE > unlimited 5G for $40/mo for ... everyone no long term contracts or credit checks could NOT be more excited about this one more to build ---> cash.app/press/cash-app-mobi…
61
57
620
569,312
Jun 11
it’s all context and loops
Apr 8
it’s all context and loops
2
190
Jun 4
it's block thursday
3
80
Jun 4
I've been testing this in the wild for a few weeks now and the reactions people have when the see me use a physical object to tap-to-pay is so fun. can't wait for you all to get your hands on this!
Jun 4
pay by magic
1
10
578
Jun 3
Had a conversation with someone and they asked me how an agent knows when to stop working on something. This felt very much like a curse of knowledge moment. I explained that agents exist because models gained the ability to do tool calling, and that we use the lack of any tool calls as an indication to the harness that the model is done working. What would you have said?
1
6
752
May 31
Should we rebrand agent loop compaction?
1
3
277
May 15
first it’s -p, next it will be no more jsonl to disk. iykyk
2
267
May 13
Good luck buying a hacky sack rn
1
163
May 11
people and their differing opinions are now sharply the limiting factor to velocity; some of that is still good though to prevent speed in the wrong direction; some.
1
4
197
May 6
huge if true
Introducing SubQ - a major breakthrough in LLM intelligence. It is the first model built on a fully sub-quadratic sparse-attention architecture (SSA), And the first frontier model with a 12 million token context window which is: - 52x faster than FlashAttention at 1MM tokens - Less than 5% the cost of Opus Transformer-based LLMs waste compute by processing every possible relationship between words (standard attention). Only a small fraction actually matter. @subquadratic finds and focuses only on the ones that do. That's nearly 1,000x less compute and a new way for LLMs to scale.
1
272
May 2
My kids just discovered Suno. 🪦
1
186
May 1
Codex app team is cooking so fast this Update button is literally always there
7
47
2,684
May 1
Illinois is not on that ai voice cloning grind
1
233
May 1
McKinsey says that... yep stopped reading
224
May 1
some extra gaslighting would have been fine
1
213
Apr 30
just made @CashApp a lot smarter
4
2
62
6,360
Apr 29
This guy gets it
Apr 29
my morning psychosis - ralphing a better github on top of @freestyle_dev git server new loop - I have heard from a few folks that codex 5.5 is the first model that can reliably simplify code without out messing it up, so we're doing 3 passes per loop: codex 5.5. low - ralph opus 4.7 high - ralph codex 5.5 low - simplify this code, make @martinfowler proud Repeat stay tuned and follow along (link in comments)
4
757
Apr 28
this UI from Google Docs is one of my least favorite things
5
6
154
9,019