AIS Aunjai Check-in

A food street you play like a game. AIS Aunjai Check-in turned Banthat Thong — one of Bangkok's most famous eating streets — into a location-based AR hunt for AIS, Thailand's number-one mobile network. Walk the street, scan the checkpoints, and a mascot appears through your phone camera, waiting to be caught. Complete a set and the points land straight in your AIS account, ready to trade for a free meal or a discount at the shops lining the road. Think Pokémon-Go — run at corporate scale, with the rewards waiting in real restaurants on either side of you.

It lives inside MyAIS. There's no separate app to download and no password to type — you open AIS Aunjai Check-in straight from the MyAIS app, and a secured hand-off signs you in automatically. From there the screen is a live map of Banthat Thong with every checkpoint marked and a collection board tracking what you've caught so far. A button at the bottom opens the AR camera; find a checkpoint's QR, raise your phone, and a mascot materialises in the live view — tap to collect it. Fill a set and you earn AIS Points — the carrier's own loyalty currency — which you redeem on the spot for free food or a discount at the participating shops. Map, collection, camera, catch, reward: one Next.js web app, played straight from the street.

The hardest part wasn't the catching — it was the carrier. AIS Aunjai Check-in runs inside the MyAIS ecosystem, so there's no separate account: players arrive already signed in, tapped straight through from the MyAIS app. Behind that hand-off, the game holds a live partner session with AIS's auth server — refreshing its client token continuously — and, on entry, decodes exactly which mobile number is playing. Every catch, every collection, every redemption is written to MongoDB against that number; and each time a player earns points, the backend mints a per-number signed JWT and posts it to the AIS service server, so the points land in the player's real AIS account in real time. The reward economy sits on top: a live ledger of how many prizes remain, a redemption flow, and traffic control for the moment a popular reward drops and everyone reaches for it at once.

A campaign is only as good as its worst minute. With a famous food street, a two-month run and the AIS name on it, the system had to stay up through dinner-rush spikes and the stampede every time a reward dropped. So it was built for scale from the start: a load-balanced fleet behind a CDN, with the backend and MongoDB provisioned to absorb tens of thousands of concurrent players and hundreds of thousands of writes a second — deep headroom, so a reward drop that has people tapping "redeem" at once still counts prizes down to zero without double-spending. All of it — the AR game, the MyAIS integration and the backend — was designed and built solo, end to end. Across two months it carried 14,347 players and 96,514 scans, ran comfortably inside that headroom, and never lost the thread between a catch on the street and the points landing in a player's AIS account.