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Lye Jia Jun (Jayce) Profile
Lye Jia Jun (Jayce)

@lyejiajun

Followers
142
Following
1K
Media
121
Statuses
630

Building in AI | AI Safety | Ex-YC Startup Engineer | Ex-ByteDance

San Fransisco, CA
Joined May 2019
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@lyejiajun
Lye Jia Jun (Jayce)
16 days
Life update: I've spent the past few months of my life just building & learning. I realized I should probably share some stuff I've built because I quite like the idea of #buildinpublic Just a rough list, some discontinued; some received real active users; some receive several
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@lyejiajun
Lye Jia Jun (Jayce)
15 hours
i've been learning a bit about GEO (generative engine optimization) lately - in summary, making sure your page shows up in chatgpt's answer. it sounds so fancy, but i don't think many people realizes that the fundamentals STILL relates to SEO. IF your page is ranked 1st on
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@lyejiajun
Lye Jia Jun (Jayce)
1 day
is there anyone building in the crypto space?
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@lyejiajun
Lye Jia Jun (Jayce)
1 day
how do you find people building in the crypto space?
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@lyejiajun
Lye Jia Jun (Jayce)
1 day
i just demo'd one of the many things i built to an enterprise customer. it was so simple i feel abit ashamed to share it. but guess what? they loved it. everyday is a reminder how complex your tech is =/= how much value your customers get!
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@herculesdey
Hercules
2 days
The 5 Hard Yeses Say yes to: • Boring reps. • Public scoreboards. • Small wins stacked daily. • Feedback that stings. • Work that pays not work that looks good. Say no to everything that weakens those five. That’s how you get free.
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@lyejiajun
Lye Jia Jun (Jayce)
2 days
not everyday of building is actually building. some days we analyze financial statements 😄
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@lyejiajun
Lye Jia Jun (Jayce)
3 days
what do you do when you feel lost and unsure?
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@lyejiajun
Lye Jia Jun (Jayce)
4 days
ICYMI: OpenAI just dropped AgentKit, a full-stack toolkit for building, deploying, and evaluating AI agents. This is essentially a visual workflow builder, chat UI kit, evals, connectors, and guardrails all in one place. This basically turns “AI agent orchestration” into
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@lyejiajun
Lye Jia Jun (Jayce)
5 days
people has been asking me why the heck am i SO bullish on agentic ai. the reason is simple: i've tried, at least for weeks, countless ways to fix problems related to my WSL setup for my windows device but to no avail. i've tried fixing it almost once every few months for a year
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@lyejiajun
Lye Jia Jun (Jayce)
5 days
i found a way to clone every single website: would anyone be interested in this?
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@lyejiajun
Lye Jia Jun (Jayce)
6 days
Computer Science Undergraduate Association (CSUA) might be the best club in @UCBerkeley
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@lyejiajun
Lye Jia Jun (Jayce)
6 days
trying out google adk
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@lyejiajun
Lye Jia Jun (Jayce)
7 days
in nearly all usecases, i have found ChatGPT and Claude to outperform Gemini. but i finally found one thing that Gemini does better at: handling long context for hour-long videos. both claude and chatgpt is unable to take in so much context through their chat interface. But
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@lyejiajun
Lye Jia Jun (Jayce)
9 days
how did you make your first non-family/friends sales?
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@lyejiajun
Lye Jia Jun (Jayce)
9 days
just curious... does anyone ever have moments where you just feel like you're not reallllyy 'learning' because you're vibecoding everything? it's a weird feeling. lol.
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@lyejiajun
Lye Jia Jun (Jayce)
9 days
what a privilege it is to be overwhelmed by a life i once prayed for. i hope you see life the same way too.
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@lyejiajun
Lye Jia Jun (Jayce)
9 days
i used to think that once i switched from windows to mac, all my debugging hell problems would be solved. boy was i wrong... 😭
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@lyejiajun
Lye Jia Jun (Jayce)
10 days
I built “prompt isolation” for AI chats: a Chrome extension that redacts PII, creds, and API keys before text leaves the page. 100% local. Repo ↓ 1) How it works content.js watches inputs and paste injected.js hooks programmatic sends (XHR/fetch) Defense-in-depth: input,
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@lyejiajun
Lye Jia Jun (Jayce)
10 days
day 61 of building in public! Here are my stats: - 132 followers - 5K impressions - 180 likes still small but trying to grow everyday!
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@lyejiajun
Lye Jia Jun (Jayce)
10 days
4/ The fix in one step. We built SecureGPT — a Chrome extension that auto‑detects and replaces PII, API keys, card numbers, and more across 8+ AI chats, all locally in your browser. https://t.co/0oAJtEQMJ7
Tweet card summary image
chromewebstore.google.com
Protect your privacy in AI chats! Auto-detects and removes emails, credit cards, SSNs with placeholders on ChatGPT, Claude & more.
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