Reverse Engineering (RE) by Fluid Attacks is an outside-in process of deconstructing software, performed by certified, experienced hackers. They analyze and obtain knowledge about applications’ flaws or vulnerabilities using disassemblers, debuggers, and decompilers, relying mostly on their skills and creativity. RE starts with static methods to recognize components and functions, then moves to dynamic methods like sandboxing and symbolic execution for focused experimentation to confirm or discard software operation hypotheses. This helps hackers understand the difficulty of hacking into applications or systems and develop attacks to report cybersecurity weaknesses. Manual and accurate testing is highly useful for teams committed to their company’s security. Fluid Attacks has recognized that relying on automated tools for IT systems’ assessments is not the best option due to high false positive rates. The RE technique reveals the details and components of applications or systems and their interactions to identify patterns and assess cybersecurity risks. The RE technique can be complemented by DAST, SAST, and SCA for comprehensive application security testing, guaranteeing minimal rates of false positives and false negatives in software assessments. Fluid Attacks tests applications and systems, covering all software development stages, assisting clients in quickly identifying and managing vulnerabilities to reduce the risk of incidents and deploy secure technology.