Another Hackathon Win! | Building an App in 4 Hours
This time we participated in the Stripe x Greptile hackathon, where we built an app from scratch in 4 hours. We built an agent that identifies incorrect hosp...

Jake Kang
233.5K views β’ Nov 10, 2025

About this video
This time we participated in the Stripe x Greptile hackathon, where we built an app from scratch in 4 hours. We built an agent that identifies incorrect hospital bills, labels the wrong codes, and drafts a letter for you to send to hospitals.
Affiliates:
Try v0: https://v0.link/jake-kang
Learn to code! at https://scrimba.com/?via=jakekang
AI Note Taking: https://go.granola.ai/jake-kang
Licensed Music: https://www.epidemicsound.com/referral/dmxfyg
Camera: https://amzn.to/3LtF84u
Mic: https://amzn.to/4qCnCeL
Other hackathon videos
Winning 15k at a Hackathon! https://www.youtube.com/watch?v=GNcqD1FEGRo&feature=youtu.be
Our First Hackathon Win: https://www.youtube.com/watch?v=2uedRTJ7h9o
My Hackathon Process: youtube.com/watch?v=8a2TBYaPQQc&feature=youtu.be
Chapters
00:00 - Introducing our Project Idea
00:26 - Brainstorming
1:56 - Where do we start?
2:36 - Creating a mock-up
3:24 - 4 hours left: how we are dealing with the data
4:31 - 2 hours left: UI progress
5:03 - 1 hour left: Codex, integrating, everything is breaking
7:28 - 20 min left: Last minute changes, fixing bugs
8:37 - 10 min left: demo video, final project
9:27 - Preparing for the Demo
9:37 - Post-demo thoughts
9:55 - Post Hackathon Reaction!!
Follow me and my teammates on X:
https://x.com/jakekang
https://x.com/nickmecklenburg
https://x.com/rvtsang
Affiliates:
Try v0: https://v0.link/jake-kang
Learn to code! at https://scrimba.com/?via=jakekang
AI Note Taking: https://go.granola.ai/jake-kang
Licensed Music: https://www.epidemicsound.com/referral/dmxfyg
Camera: https://amzn.to/3LtF84u
Mic: https://amzn.to/4qCnCeL
Other hackathon videos
Winning 15k at a Hackathon! https://www.youtube.com/watch?v=GNcqD1FEGRo&feature=youtu.be
Our First Hackathon Win: https://www.youtube.com/watch?v=2uedRTJ7h9o
My Hackathon Process: youtube.com/watch?v=8a2TBYaPQQc&feature=youtu.be
Chapters
00:00 - Introducing our Project Idea
00:26 - Brainstorming
1:56 - Where do we start?
2:36 - Creating a mock-up
3:24 - 4 hours left: how we are dealing with the data
4:31 - 2 hours left: UI progress
5:03 - 1 hour left: Codex, integrating, everything is breaking
7:28 - 20 min left: Last minute changes, fixing bugs
8:37 - 10 min left: demo video, final project
9:27 - Preparing for the Demo
9:37 - Post-demo thoughts
9:55 - Post Hackathon Reaction!!
Follow me and my teammates on X:
https://x.com/jakekang
https://x.com/nickmecklenburg
https://x.com/rvtsang
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Video Information
Views
233.5K
Likes
6.7K
Duration
11:13
Published
Nov 10, 2025
User Reviews
4.7
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