Kumar Karuppiahyogarajah enhanced reliability and privacy in TTS components across the RDK platform, focusing on rdkcentral/rdkservices and related repositories. He delivered a targeted fix for Broadcom Voice Guidance playback by updating GStreamer plugin configurations and internal audio links using C++ and embedded systems expertise. Kumar also improved security by hardening TextToSpeech logging, aligning build variants in meta-rdk-video to prevent sensitive data exposure in production. Through middleware updates and build system configuration using BitBake and CMake, he reduced log noise and improved observability. His work addressed operational risk and streamlined debugging, demonstrating depth in embedded audio and secure logging.