Android App Performance Optimization

I need an experienced developer to take a deep look at my Android application and the server calls that power it, then tune both sides so the user experience feels instant and light. Right now the app shows occasional frame drops, long cold-start times, and higher-than-expected RAM usage... (Budget: ₹1500 - ₹12500 INR, Jobs: Android, Android App Development, Android Studio, API Development, Java, JavaScript, Kotlin, Mobile App Development)