Responsibilities:
Improve the performance of our code base by tackling performance debugging (at the single machine or datacenter levels)
developing performance tools to profile hardware utlization at all levels
working with software developers to identify hot spots, and bottlenecks, and optimizing around them

Improve overall performance of our code base by analyzing performance bottlenecks, then designing and implementing changes to the tool chain that would relieve those bottlenecks. Possible projects include improving inter- procedural, in-lining, profile-driven, post-link, or whole-program optimization

Improve overall productivity of our programmers by identifying programming errors that could have been detected by static analysis, then designing and implementing changes to the tool chain that would catch those errors as early as possible

Demonstrable experience in at least one of the following:
Compiler design and code optimization.
Performance debugging and optimization of large C++ applications
Static code analysis