ArenaSwap
A browser extension that watches every live game in your tabs and swaps you to whichever one is most exciting in the moment, scored by a custom algorithm I built called PowerScore.
I like to build cool things using cool tools.
And sometimes I make things that make me laugh. I hope you do too.
Some of my faves
All work
Various CS Projects
Coursework + personal projects from Northeastern.
The Book Nook Project
Built and shipped the website for a Philadelphia-area nonprofit getting books into the hands of underprivileged kids.
Tritons Swim
Full team website for the Deerwood Tritons summer swim team — registration, records, roster, news. Built freelance, now archived.
Newsroom
All of it
Ryan Mullin Ships ArenaSwap 2.0
The rebuilt browser extension now tracks 31 leagues instead of 12, checks each game on its own clock based on how close it is, and speaks 11 languages.
Year One: A Postmortem, a Week of Ship, and What's Next
A look back at my first year at Northeastern — what it cost, what it gave me, how development came alive again, and where I'm headed next.
Ryan Mullin Ships ArenaSwap 1.0
ArenaSwap scores every live game in a viewer's open tabs and switches the browser to whichever one is most exciting at that moment.
Want to chat?
Looking for a co-op? Have freelance work? We both know you have something to say!
© 2026 Ryan Mullin// Hedgehogs are found naturally on every continent except Antarctica 🦔