During April 2025, Wu focused on stability improvements across distributed systems, working primarily in C++ and Python. In the facebook/fbthrift repository, Wu reverted an AArch64-specific varint encoding optimization, restoring the previous implementation to address correctness and performance concerns in serialization. In pytorch/torchrec, Wu removed the ITEPLogger and associated scuba logging, simplifying the GenericITEPModule and resolving issues with logging instrumentation. These targeted rollbacks prioritized maintainability and predictable behavior over new feature development, demonstrating a methodical approach to risk reduction ahead of release. Wu’s work reflected strong skills in benchmarking, performance optimization, and clear documentation of engineering decisions.