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personjerry

7,329 karma · joined November 28, 2013

Previously Head of Growth at Dendron (YC W21), and machine learning at Facebook before that.

If you're stuck on your startup and need to bounce ideas, talk metrics, or figure out customer development, I'm happy to chat.

My email is personjerry [at] gmail [dot] com

My blog is at https://jerry.wtf

submissionscomments
personjerry··on Why so few Matt Levines?
Hmm it's kinda crazy how well his main points [on why Matt Levine educates so well] map to ML concepts:

1. cases with known outcomes/answers => data with labels

2. first-principles explanations: most people experience an “illusion of depth” => avoiding local minima

3. spaced repetition enabled by fast turnover => stochastic optimization

personjerry··on Learning to Learn
> Very quickly identify what the foundational knowledge is.

This seems to be the most important part but also has the hidden and problematic dependency of... already knowing (i.e. already having learned) what the foundational stuff is?

personjerry··on Show HN: HN Update – Hourly news broadcast of top HN stories
"First up a webgpu wifi simulator has emerged, although details remain sparse due to trouble extracting data from the linked resource"

Sounds about right

personjerry··on Notion's mid-life crisis
There's ways to export the notes btw, for example https://github.com/storizzi/notes-exporter
personjerry··on Averaging is a convenient fiction of neuroscience
Reminds me of "When U.S. air force discovered the flaw of averages" [0]

[0]: https://www.thestar.com/news/insight/when-u-s-air-force-disc...

personjerry··on I won't be renewing my Pinboard subscription
Every paid service shuts down eventually.
personjerry··on Entire staff of game publisher Annapurna Interactive has reportedly resigned
In their nascent years I played two of their early games, both mobile games - Florence and Gorogoa. Both beautiful. I still play Florence once in a while and it really evokes emotions. Gorogoa is a great puzzle game that the HN crowd would love. Highly recommend both if you haven't tried them!
personjerry··on Questions about LLMs in Group Chats
Is that the only thing you talk to your friends about?

I mean yeah literally you could talk about your plans [i.e. by yourself or with the other real people] or what's going on in your life and have the bot chime in with thoughts too. You could talk about food, philosophy, politics, travel, complain about stuff, get advice for relationships or work, gossip. All in a group chat setting.

It's not hard to imagine a bot that's able to contribute here and there in a meaningful way in any of these subjects, and other unlimited subjects. But perhaps you weren't open to it in the first place so I'm not going to try to convince you further if you don't buy it; If you don't want to really give it consideration then nobody is going to convince you otherwise.

personjerry··on Questions about LLMs in Group Chats
For all the same reasons you talk to humans...
personjerry··on Questions about LLMs in Group Chats
I think it's inevitable that group chats will involve LLM agents in the future.
personjerry··on Cruise ships chopped in half are a license to print money
This comment was very useful and informative! Thank you.
personjerry··on Show HN: Icebreaking AI. A free tool to help you find close friends
Nobody talks like this, it's super awkward

Real interaction is about living in the moment and reading the room

This is a nerd solution to a nerd problem

personjerry··on Code Smarter, Not Harder: Developing with Cursor and Claude Sonnet
That's a failure of imagination. If I can architect and describe my interfaces and have Claude write the current component, then I can repeat with every other component and write minimal code / corrections.

At the same time, I've minimized complexity in my codebase. It's a win-win, and honestly probably the next paradigm of software engineering.

personjerry··on Ask HN: Who wants to be hired? (September 2024)

  Location: NYC
  Remote: Preferred
  Willing to relocate: Maybe
  Technologies: Machine Learning, AI, Product Management, Growth Strategy, Python, Data Analysis, Web Development, App Development, Community Engagement
  Résumé/CV: https://www.linkedin.com/in/personjerry
  Email: jerryliu@berkeley.edu
I'm a product and growth leader with over 8 years of experience in Silicon Valley, including roles at Facebook and a YC startup. My expertise includes:

- Product-led growth strategies

- AI/ML product development and consulting

- Building and scaling engineering teams

- Data-driven decision making and analytics

- Community engagement and retention improvement

I'm open to roles in product management, growth, or AI/ML engineering, particularly in startups or companies focused on social impact. Let's connect if you're looking for someone who can drive product success and user growth!

personjerry··on Did your car witness a crime? Bay Area police may be coming for your Tesla
Kinda sounds like we're heading for the authoritarian surveillance state that China has spearheaded, only with more steps
personjerry··on Maduro lost election, tallies collected by Venezuela's opposition show
I don't understand, if I think something is going to do well am I not allowed to invest in it? Isn't that the whole point of investing? Where is the misalignment here?
personjerry··on TinyPod – Apple Watch case with scroll wheel
This has made me want the Apple Watch more than any ad
personjerry··on Nevada’s public employee pension fund invests passively and beats peers (2016)
> There’s strong evidence no individual trader can expect to beat the market.

I don't understand that. If you just bought Apple instead of SPY 20 years ago wouldn't you be doing great?

personjerry··on Show HN: Resurrecting a dead Dune RTS game
Any chance to port this to mac? :)
personjerry··on The shape of information
Reminds me of the probability based counting algorithm that was on the front page last month: https://news.ycombinator.com/item?id=40379175
personjerry··on Show HN: I made a puzzle game that gently introduces my favorite math mysteries
How does the zero-knowledge solution make sense? Can't you just cheat and show me two random different colors whenever I click two post-its?
personjerry··on “Attention assault” on Fandom
Surely there's a way to build a wiki on top of GitHub? That automatically converts wiki changes to PRs for example. So that arbitrary wikis can be built open source and leverage github's free hosting
personjerry··on Coqui.ai TTS: A Deep Learning Toolkit for Text-to-Speech
Not surprising. When I was researching options for a client I tried a few companies including ElevenLabs and Play.ht, each seemed happy to talk to us... except Coqui. I think I went as far as reporting bugs to them, just to have them aggressively ignore me. I guess they're more of a research team than a business?
personjerry··on Your Phone, Minus the Distractions
I mean it feels like 2-factor authentication where both factors are one and the same.

If someone had the willpower to ignore distractions already, they would do so with or without gadgets like this one. And ultimately if they crave those distractions again they're just going to stop using this tool after those 15 minutes or whatever time.

Similar tools have existed for a long time, and while sure there's an opportunity to capture a small market in the same way diet pills sell to a few people, it's nothing novel or even effective at solving the real problem.

This is just yet another gimmick that tries to tackle the symptoms of the underlying issue that we actually like the distractions and need those dopamine hits.

personjerry··on Shu Ha Ri (2014)
Here's the whole article:

> Early stages of learning focus on concrete steps to imitate (shu), the focus then shifts to understanding principles (ha) and finally into self-directed innovation (ri)

personjerry··on The right not to be subjected to AI profiling based on publicly available data
Surely the issue in "AI profiling" is "profiling" not "AI"?
personjerry··on Ask HN: Who wants to be hired? (June 2024)

  Location: US/Canada
  Remote: Strongly preferred
  Willing to relocate: Yes
  Technologies: Python, JS, React, PHP, ML
  Résumé/CV: https://www.linkedin.com/in/personjerry/
  Email: on my HN profile
Looking for remote Product / Growth opportunities. I have a proven track record in product management and growth, helping startups build teams and leading them to create successful software products with fast user growth and high retention, most recently as Head of Growth at Dendron Inc. (YC W21).

I'm technical, with engineering and leadership experience at Facebook.

personjerry··on We're Watching Facebook Die
Having the right metrics is very important in product development. Your team will improve the things you measure.

Daily active people is the de facto north star metric for a lot of companies, and to move forwards and adjust their definition is interesting.

"Obfuscated" is a judgment we're making. I'm assuming internally it's very well-defined. Perhaps they need to better define it outwardly.

I am giving them the benefit of the doubt and if they are indeed doing it as obfuscation, I agree it's not good.

personjerry··on We're Watching Facebook Die
> When a company starts playing weird games with how it reports user activity, something is going very, very wrong. In general, when a company starts trying to obfuscate the true numbers about its revenue, growth, or profit, it’s a bad sign.

Citation needed. When companies shift from Monthly to Daily active users for example it's a perfectly valid way to recognize that they want to change the way they think about their north star metrics. At Facebook scale, I think it's rather brave for them to change the most important metrics that they report, showing that they're still open-minded to innovate on that frontier (and they are most certainly on that frontier as few companies operate on that scale). Having worked there in the past I would believe that this isn't just a vanity change, most likely a fundamental change on how their teams will be viewing these metrics and objectives, and may lead to material differences, likely for the better.

personjerry··on [dead]
This is a paid ad. Flagged.
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