Worked on the espressif/arduino-esp32 repository to refactor WiFi provisioning for ESP32 devices, focusing on improving reliability and startup performance in embedded systems and IoT deployments. Introduced a dedicated initialization function and variant-based schemes in C++ to ensure provisioning is always initialized before use, addressing race conditions and synchronization issues. The provisioning flow was split into two parts, reducing startup errors and supporting multiple device variants for robust onboarding. These changes enhanced device-specific onboarding, lowered support overhead, and accelerated deployment time, demonstrating a methodical approach to embedded software engineering with a focus on maintainability and field deployment reliability.