Application Development & Architecture: Java, C, C++, Node.js, React, Windows Application Development, REST APIs, Spring boot Framework, JSON, MongoDB, NoSQL Databases, Microservices Architecture, Event-Driven Architecture, Distributed Systems, Enterprise Integration Patterns, Domain-Driven Design. The ideal candidate combines strong people leadership with deep experience in POS or transaction-processing software, cloud-native engineering, distributed systems, integrations, and modern software delivery practices.