AgileEngine, a leading software development partner for Fortune 500 brands, is seeking a Senior Software Engineer to own offline-first data synchronization for a general QSR POS platform. You will design multi-tier sync across device, restaurant edge, and cloud, and implement CRDT-based conflict resolution with vector clocks and eventual consistency. You will also apply event sourcing, CQRS, and saga patterns across order, kitchen, payment, and receipt workflows, while refining the PostgreSQL