Unix, C, Algorithms, Linux, Diameter, SNMP, Service Assurance, Design Patterns, Data Structures, OSS BSS Architecture, Fault Management, Production Support, Performance Management, Multi threading and Concurrent Programming, Defect Analysis, engineering support, Root Cause Identification, OSS BSS, Protocols Networking, SIP, Inventory Management, Domain Expertise, Service Provisioning, Debugging and Performance Tuning