Apache Kafka, Application Programming Interface (API), Business Analysis, Card Processing, Code Reviews, Content Management Systems (CMS), Credit Cards, Debugging Skills, Financial Regulations, Java, Maintain Compliance, Messaging Middleware, Messaging Technology, Microservices, PCI-DSS, Payment Processing, Performance Tuning/Optimization, Production Support, Production Systems, Quality Assurance, REST (Representational State Transfer), Scalable System Development, Service Level Agreement (SLA), Software Administration, Software Development, Software Development Lifecycle (SDLC), Software Engineering, System Integration (SI), Systems Administration/Management, Test Plan/Schedule