~/ work / eventstacks mobile · QR · payments · operations
Six mobile stacks,
one event base.
Trainspot KK · own product
Event Stacks is a mobile-first event operations platform built by Trainspot KK for the Japanese event industry. A central data hub (Event Base) plus six specialised mobile stacks — Access, POS, Sales, Vendor, Task, Time — operated by gate staff, vendors, and the operations team.
// context
Live events in Japan are typically run by a different vendor for every problem: ticketing, gate, point-of-sale, staffing, finance. We wanted a single mobile-first stack that scaled from a 500-person conference to a 100k-visitor festival without replacing the underlying tooling, and that fit the Japanese market's payment, language and hosting expectations.
// our role
Engineering across the stack: the Flutter mobile applications used by gate staff, vendors and the operations team; the Event Base cloud backend hosted on Japanese cloud infrastructure; QR-code access control with offline-tolerant validation; mobile POS with SoftBank SBPS QR-code payments; multi-currency and multi-payment handling.
// stack
- Flutter
- QR access
- SoftBank SBPS
- Japan cloud
- Real-time sync
// outcome
Used to run 100+ events: 300,000+ tickets, 1M+ transactions, ¥1B+ in sales (figures published at eventstacks.io). Active product since 2023.
// links
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