Don Yu


Hey there!

I mostly do recreational web development for fun and hackathons. Shoot me a message if you wanna hack something together.


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Hackathons Hacks Skills Contact

Volunteer NOW Submitted


Volunteer NOW : fill in your schedule with a few simple clicks and receive emails with volunteer opportunities that match your availabilities and interests. Perfect for the busy college student with a hectic schedule but a giving heart. We solve the logistics for you...Volunteer NOW!... Read More

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Coderprep Submitted

Columbia University DevFest

A website that enables coders to prep & prep each other for coding interviews. Review common topics seen on coding interviews, track your progress on weak areas, and set up mock interviews with other coders. Take a demo mock interview here, explore our lessons, and sign up to track your progress.... Read More

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Grabinero Submitted

FinTech Hackathon

Don't have time to run out and grab lunch?
Going by Staples and have extra room for junk in your trunk?

Ask if there's anyone available to pick things up for you or offer to pick things up for someone else while you're out.

Worried about settling the bill? Peer-to-peer payments are recorded... Read More

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Wing Woman In Progress

Hack'n Jill

Discover the perfect date at the greatest deal!... Read More

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Babbage In Progress

FinTech Hackathon: November 2013

Save more of your cabbage with Babbage!

Babbage is a budgeting tool that reviews your spending by looking at your recent transactions via Yodlee. We then recognize your recurring transactions and automatically extrapolate your checking account balance into the future to see if you're going to h... Read More

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CUArts App Submitted

DevFest 2014

The indie iOS+Android application for the CUArts program at Columbia University. Developed by @don4yu at Devfest 2014. Find free musuems/performances that are covered by your CUID nearby!... Read More