johnjwang

6 ms·

1.
The engineering behind the US Strategic Petroleum Reserve(johnjwang.com)
212 points by johnjwang 2d ago|83 comments
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Learnings from OpenAI's open source Codex Repo(johnjwang.com)
2 points by johnjwang 15d ago|0 comments
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by johnjwang 1mo ago
There exist methods to detect what kind of watermarking tool that someone is using, and most of the big tools have specific signatures that you can look for. For Anthropic, it’s highly likely that the watermark is a SynthID type mark simila
4.
by johnjwang 1mo ago
I ran some tests from the watermarking literature: https://johnjwang.com/post/2026/08/12/how-claude-watermarkin... Short version: it's likely a SynthID style statistical watermarking scheme that Ant
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How Claude's watermarking (probably) works(johnjwang.com)
3 points by johnjwang 1mo ago|0 comments
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Code review bottlenecks: How we hill climbed our way to higher PR throughput(assembled.com)
11 points by johnjwang 1mo ago|0 comments
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by johnjwang 3mo ago
Fascinating! Hadn't heard of speech-core before, but will check it out if we are thinking about adding voice (though right now are focused on some more core-platform specific things like allowing for multiple changesets in a single ses
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Show HN: 143.dev – we open-sourced our internal coding-agent infrastructure
13 points by johnjwang 3mo ago|3 comments
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Cheap software won't make engineering cheap(johnjwang.com)
5 points by johnjwang 4mo ago|0 comments
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Number of tokens shouldn't be the only metric(johnjwang.com)
1 points by johnjwang 4mo ago|0 comments
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Why are executives enamored with AI, but ICs aren't?(johnjwang.com)
109 points by johnjwang 6mo ago|168 comments
12.
by johnjwang 11mo ago
(Author here) I stand by this comment and I think it’s really important for engineers to recognize that everyone has different places where they gain and lose energy. My team and I have been extremely lucky in hiring Joe, our excellent head
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by johnjwang 11mo ago
(Author here): I hear what you’re saying, though I’ve never “crowed about regularly checking code in on Saturdays and Sundays” and I think that’s a false characterization of my article. Do I love to code? For sure. Is it something I do on t
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Why I code as a CTO(assembled.com)
308 points by johnjwang 11mo ago|282 comments
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Operational issues on AWS us-east-1 – multiple services(health.console.aws.amazon.com)
9 points by johnjwang 11mo ago|2 comments
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by johnjwang 11mo ago
Very true, and I promise we didn’t solve P vs NP over lunch :). We just got much better at not exploring useless parts of the tree
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Old school AI isn't dead: How we achieved a 12× speedup on an NP hard problem(assembled.com)
28 points by johnjwang 11mo ago|6 comments
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We shipped GPT-5 support before lunch(assembled.com)
3 points by johnjwang 1y ago|0 comments
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Blocking LLMs from your website cuts you off from next-generation search(johnjianwang.medium.com)
59 points by johnjwang 1y ago|77 comments
20.
by johnjwang 1y ago
From the API standpoint, it makes a lot of sense for us to be able to provide different types of providers. And we've found also that different models/providers are better at different types of tasks. For example, the Gemini model
21.
Your LLM provider will go down, but you don't have to(assembled.com)
24 points by johnjwang 1y ago|3 comments
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by johnjwang 1y ago
To be clear, we still hire engineers who are early in their careers (and we've found them to be some of the best folks on our team). All the same principles apply as before: smart, driven, high ownership engineers make a huge differenc
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by johnjwang 1y ago
In my experience, it still does take quite a bit of time (minutes) to run a task on these agentic LLMs (especially with the latest reasoning models), and in Cursor / Cline / other code editor versions of AI, it's enough time
24.
by johnjwang 1y ago
Some engineers on my team at Assembled and I have been a part of the alpha test of Codex, and I'll say it's been quite impressive. We’ve long used local agents like Cursor and Claude Code, so we didn’t expect too much. But Codex s
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How we learned to stop worrying and love the AI (in coding interviews)(assembled.com)
16 points by johnjwang 1y ago|0 comments
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Scaling LLMs with Golang: How we serve millions of LLM requests(assembled.com)
17 points by johnjwang 2y ago|0 comments
27.
by johnjwang 2y ago
Thanks for the suggestion -- I'll take a look into adding this!
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by johnjwang 2y ago
Author here: Yes, there are certain functions where writing good tests will be difficult for an LLM, but in my experience I've found that the majority of functions that I write don't need anything out of the ordinary and are relat
29.
Using LLMs to enhance our testing practices(assembled.com)
186 points by johnjwang 2y ago|77 comments
30.
by johnjwang 2y ago
Assembled | Software Engineer, Product Manager | San Francisco or New York | Full-time Assembled helps customer support teams resolve issues with the right agent, providing the right answer, at the right time. Over 300 industry leaders, inc

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