Case studies
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In-store QR payments
A net-new in-store payment capability. Async coordination across terminal, gateway, and third-party provider, with fail-closed reconciliation.
Ruby on Rails · REST · Sidekiq · MySQL · Vue.js · Android (Java)
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Elasticsearch migration
Moved payment search off MySQL onto an event-driven Elasticsearch pipeline. Latency and reliability, quietly.
Elasticsearch (Elastic Cloud) · MySQL · Sidekiq · Redis · Datadog · Ruby on Rails