Algorithms, Testing, Design Patterns, Coding Standards, data structures, build processes, reliability and scaling, component architecture simplification, engineering excellence, large scale distributed systems, code refactoring, object-oriented concepts, code reviews, source control management, operations, multi-tier systems, retail e-commerce system design, high-volume transaction processing

Design Patterns, Testing, Distributed Systems, Coding Standards, build processes, operations, full software development life cycle, code reviews, source control management