Live buyers leaderboard
Top buyers ranked in real time as sales land, so the audience sees the competition heat up and regulars get their moment on screen.
Overlay Deck
A commercial product that turns a live selling stream into a broadcast. It reads what's happening on a Whatnot show in real time and paints pro on-stream overlays: a live buyers leaderboard, instant sold reveals, auction countdowns, and AI-powered card pricing. Designed, built, and shipped end to end, available at overlaydeck.com.
RoleSolo: design, build & ship
TypeBrowser extension + desktop app
MarketLive sellers & streamers
StatusShipping commercially
The problem
Live selling is exploding, but sellers' streams look plain next to a real broadcast. They want pro overlays: who's buying, what just sold, what a card is worth. The catch is a technical one. The streaming software can't read the selling platform's live data, and the selling platform can't draw overlays into a stream. The two worlds don't talk.
Sellers needed something that bridges that gap and looks great doing it, without asking a non-technical creator to wire up servers.
What I built
A two-part product that quietly connects the selling platform to the streaming software. A browser extension listens to the live show and a small desktop app turns that stream of events into polished overlays the streaming software can display, all running locally on the seller's own machine. Install, paste one key, and the overlays go live.
AI card pricing
Point at a card and the app identifies it and pulls its current market price on the spot, turning "what's it worth?" into an instant on-stream answer.
Just-sold reveals
Every sale fires a clean sold toast on the stream, giving each purchase a satisfying, broadcast-quality moment.
Live auction overlay
Current bid, countdown, and winner reveal, so auctions feel like an event instead of a number read off-screen.
Hype meter
A bidding-frenzy meter that fills as bids fly and unlocks bonus moments, nudging the room toward the next bid.
Viewer count & branding
A live viewer count and a floating logo round out a consistent, branded look across the whole show.
One-click stream setup
Each overlay drops into the streaming software as a browser source, with copy-paste URLs and one-click add. No technical setup for the seller.
Private by design
Everything runs on the seller's own machine. Buyer information never leaves the computer, and there's no server for them to manage.
Inside the app
The control panel the seller runs alongside their stream.
The overlays
Each one is a self-contained, broadcast-ready graphic.
Built to ship, not just demo
This isn't a prototype. It's a real product with installers for both Mac and Windows, a licensing and subscription system, a guided setup any creator can follow, and a packaging pipeline that assembles the whole sales bundle in one command. I took it from idea to a thing people can buy.
Let's talk
Want to ship a real product?
From the first idea to something people can actually buy. I can take it the whole way.