Reliable POS sync
A queue-based integration makes sure every stamp and order reaches the till, even when a shop's internet drops for a few minutes.
Coffee chain loyalty app
A full rebuild of a regional coffee chain's ordering and loyalty app, with order-ahead, stamps and payments that sync with every till.
- Sector
- Food & retail
- Platforms
- iOS, Android, POS integration
- Timeline
- 4 months to relaunch
- Squad
- Tech lead, 3 engineers, designer, QA
The brief
The chain's first app had been built quickly by an agency that no longer existed. It crashed often, loyalty stamps went missing and baristas had stopped trusting it.
The goal was a relaunch that customers would actually enjoy, connected properly to the point-of-sale system in 40 coffee shops.
What we built
- Order-ahead with live preparation status
- Digital stamp card that syncs with in-store purchases
- Apple Pay, Google Pay and saved cards
- Personal offers based on order history
- Store finder with opening hours and wait times
- Integration with the chain's POS system and kitchen screens
Engineering notes
Fast start
The app opens straight to the last order and nearest shop, with data prefetched so reordering takes two taps.
Gradual rollout
The new app was released to 10% of users first, with crash and order data compared against the old version before full rollout.
Results
- store rating after relaunch, up from 3.1
- 4.6store rating after relaunch, up from 3.1
- share of orders placed ahead in the app
- +31%share of orders placed ahead in the app
- crash-free sessions, up from 94%
- 99.8%crash-free sessions, up from 94%
- missing stamps reported since relaunch
- 0missing stamps reported since relaunch
Stack
- React Native
- TypeScript
- Node.js
- PostgreSQL
- RabbitMQ
- Stripe
- Expo EAS
Have a product in mind?
Send us a short brief, a sketch or a link to what exists today. You will get a reply from an engineer, not a salesperson.