Early in my career, I integrated RESTful APIs into Android applications and developed apps using Retrofit for network calls. Retrofit simplified my work and helped me organize my code effectively. It managed network calls efficiently, handling callbacks and threading seamlessly, which allowed me to focus on other tasks without worrying about running processes in separate threads or updating the main UI thread. Although my recent experience has shifted towards the Android framework and automotive systems, I still carry valuable skills in API integration from my early days in app development.