Lattice Coffee Co.
A loyalty app that doubles as a storefront
Designed and built a React Native app with offline-first ordering, push-driven drops, and a tap-to-pay loyalty wallet. Now powers 40k monthly orders without a dedicated engineering team.
Role
Mobile lead & full-stack engineer
Duration
12 weeks
Team
Solo + 1 brand designer
Year
2024
Home — drops + order again
Placeholder · 9/16
40k
Monthly orders
4.9★
App Store rating
+62%
Loyalty repeat rate
12 wks
Time to ship
The problem
Lattice was running their loyalty program on punch cards and their online ordering on a third-party plugin that took 18% of every transaction. They wanted one experience their customers actually opened on purpose.
The approach
React Native via Expo so iOS and Android shipped from the same codebase. Built an offline-first ordering flow so the app works in basement-level cafés with no signal. Pulled loyalty, ordering, and a content feed (drops, new beans, café events) into a single home tab. Backend on Supabase with Stripe for payments and a small Next.js admin panel for store managers.
The outcome
Launched in the flagship store first, then to all 14 locations over two weeks. 40k monthly orders within 90 days, a 62% lift in loyalty repeat purchases, and a 4.9★ App Store rating across 1,800 reviews. Lattice now runs the whole platform with no in-house engineers — just monthly check-ins.
A look inside.
Order flow
Placeholder · 9/16
Tap-to-pay loyalty wallet
Placeholder · 9/16
Store manager admin (web)
Placeholder · 16/9
Stack used
“Our customers actually want to open this. That's the part I didn't expect. The loyalty stuff is a bonus.”
Sam Park
Founder, Lattice Coffee Co.