I have the compiled APK of an existing Android app, but no access to its original source code. I need the app’s functionality updated—UI can remain as-is, the priority is changing what the app does under the hood. Because the source isn’t available, the job involves decompiling the APK (apktool, jadx, smali, or a workflow you trust), making the required code-level adjustments, then rebuilding, re-signing, and verifying that the new build installs and runs on current Android versions. I’ll share the exact features I want added or modified once we start, but you can expect work around areas such as business-logic tweaks, in-app flow changes, or small feature additions that don’t demand a complete redesign. Deliverables • Decompiled project with readable smali / converted Java or Kotlin code • Rebuilt, signed APK ready for release and installation • Brief change log summarizing every modified class or resource • One test report (screenshots or video) proving the updated functionality works on at least one modern device or emulator Acceptance Criteria • The updated APK installs cleanly over the original without data loss • All existing functions keep working; only the requested areas are altered • No new crashes, security warnings, or Play Protect flags If you’re comfortable working from an APK alone and have a solid grasp of reverse-engineering tools, this should be straightforward. I’m ready to share the file and start as soon as you confirm interest and your estimated turnaround time.