Solid Principles, Soap, Java, Linux, Regression Testing, Python Scripting, Kotlin, Xml, Git, REST, Scrum, Agile, Groovy, Design Patterns, JIRA, Json, Kubernetes, Docker, Jenkins, Gerrit, API-based integrations, YANG, CI CD, OSS BSS system validation, multithreading techniques, micro-service technologies, UAT execution, Camunda BPMN design, ONAP orchestration