Keywords: Reverse Engineer, Reverse Engineering, Engineering, Software Engineer, Android Engineer, Android, Mobile Phones, Apps, Applications, Code, Coding, Code Reviews, Code Development, Apple store, Google, Google play, Google applications, Static analysis, dynamic analysis, Java, Java Developer, SDK, Jadx, Ghirda, Frida, Work from home, WFH, Cyber Security, Software development, mobile applications, Cyber, decompilation, security assessments, malware, hackers, ransoware, software reviews, mobile code, binaries, PUPs, PUP, Potentially unwanted programs, Android devices, IDA Pro, Burp, APK, APK Analysis, Kotlin, JavaScript, Mobile software, Yara, APT, Virus total, web, ExploitDB, Mitre, computer security, cryptograpy, rooting, packing, network protocols, vulnerability analysis, capture the flag. The goal of this work is develop static and dynamic signatures for mobile code that detects application user threats including malware and PUPs.