Joined April 2008
- Tweets 5,042
- Following 938
- Followers 1,796
- Likes 2,781
228 Photos and videos
Pinned Tweet
11 Sep 2025
6 months ago, we forked a coding tool and everyone called it a "scam"
Today, we're the #1 agentic coding platform, processing more code than any public platform in history
Here's how we did the impossible 🧵
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Mar 25
Curious about all the fun things and real(or totally convincing fake) news for devs this week? @WeAreDevs just had me on for their live show: youtube.com/live/EjHMWLgPZfE…
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Mar 25
Thanks for having me @danielcranney and Christian Heilman, and a pleasure to meet you @derSchepp!
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Justin Halsall retweeted
2 Dec 2025
Bun is joining Anthropic!
bun.com/blog/bun-joins-anthr…
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Justin Halsall retweeted
8 Oct 2025
Hey everyone, I'm available again for contract work.
I'm a product designer and front-end developer with over 20 years of experience in the tech industry.
I do both high quality UX/UI, and front-end development.
👇 Check out my new portfolio and recent work.
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7 Oct 2025
Calling @rrweb_io users! We're looking for pilot customers to help co-develop an rrweb backend we wished existed when we started building our rrweb backends years ago.
🧵👇
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7 Oct 2025
I'm getting together with another rrweb core team member @eoghanomurray to build yet another rrweb backend. We've built them in the past, but this time we're building one that anyone will be able to use.
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7 Oct 2025
We want to co-develop this together with a number of pilot customers before we open it up to rest of the world.
DM me if you are interested, I'd love to chat with you!
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Justin Halsall retweeted
2 Oct 2025
6 months ago I founded @kilocode to empower developers to pick the best model for the task at hand. We launched our application within a month and have since grown to become the best AI coding orchestration application. Over the last 5 months token usage has grown 1000x, from 4 billion to 4 trillion tokens a month! In September Grok Code Fast was responsible for 46% of those tokens despite only launching 4 days before the month started.
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11 Sep 2025
6 months ago, we forked a coding tool and everyone called it a "scam"
Today, we're the #1 agentic coding platform, processing more code than any public platform in history
Here's how we did the impossible 🧵
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11 Sep 2025
Personal cost was real though.
7am-11pm days. Taking calls while cycling through Amsterdam. Juggling school runs with team meetings.
After 6 months of this pace, it's time for me to step back.
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11 Sep 2025
But @Kilo_Code's story is just beginning. From "scam" to market leader in 6 months. From fork to open source powerhouse. Thank you to everyone who believed when others doubted.
Full story: blog.justinhalsall.com/p/the…
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