Do performance tuning, regression analysis, code optimization, DB/SQL tuning activities
Design algorithms for implementing these features that are performant, scalable, reliable, robust, maintainable, extensible, efficient, and understandable
Create code to implement these algorithms. The code should be performant, scalable, reliable, robust, maintainable, extensible, efficient, understandable, and conform to current programming techniques
Use profiling tools to profile and determine hotspots for resource usage for application server and databases.