The Customer Experience (CX) team owns the systems that power Kard''s end-to-end rewards experience: transaction matching and the cellar pipeline, offer ingestion and delivery (including partner integrations like Rewards Network and SEATED), the cell-based routing architecture, and the Support API that keeps our internal and partner-facing tooling running. As a Senior Software Engineer II, you''ll operate at the center of this - designing and building the services that ingest, match, and settle transactions at scale, while helping the team raise its bar on operational readiness, testing, and documentation.