What is a Reverse Engineer?

The Reverse Engineer is a technical expert who analyzes, understands, and deconstructs software, systems, or components to identify their internal logic, vulnerabilities, or operating mechanisms.
It's a profession at the crossroads of cybersecurity, low-level development, and software engineering, often practiced in sensitive contexts: defense, security, industry, or intellectual property protection.

What is the Reverse Engineer's role?

Their goal is to understand the internal workings of a program or system without having its source code.
They use analysis, disassembly, and debugging tools to observe code behavior and reconstruct its logic.

Their main missions include:

• Analyze software or firmware to understand their structure and interactions.
• Identify and fix security vulnerabilities (notably in proprietary or embedded software).
• Study malware to understand how it works and develop countermeasures.
• Audit critical systems to guarantee their integrity and security.
• Document and reconstruct how proprietary tools, protocols, or components operate.

Why do companies need this role?

The Reverse Engineer is essential to:

• Strengthen the security of critical systems (defense, IoT, healthcare, fintech, etc.).
• Analyze and counter cyberattacks or malware.
• Guarantee technological sovereignty, especially in sensitive sectors.
• Audit and harden software solutions when no internal documentation is available.

It's a key profession in offensive and defensive cybersecurity, but also in industrial property (patent analysis, compatibility, backward compatibility).

What skills are needed for a Reverse Engineer?

Technical skills:

• Mastery of assembly language and processor architectures (x86, ARM, MIPS, etc.).
• Solid knowledge of C/C++, operating systems (Linux, Windows, Android, iOS).
• Use of decompilation and debugging tools (IDA Pro, Ghidra, OllyDbg, Radare2).
• Fundamentals of cryptography, networking, firmware, and memory security.
• Understanding of system protocols and layers.

Soft skills:

• Patience and perseverance.
• Intellectual curiosity and attention to detail.
• Analytical mindset and scientific rigor.
• Discretion and respect for security protocols.

What training is needed to become a Reverse Engineer?

There's no single dedicated path, but several routes lead to this role:

• Engineering schools specialized in cybersecurity, embedded systems, or low-level computing.
• Master's degrees in information systems security or cryptology.
• Professional certifications: CEH (Certified Ethical Hacker), OSCP, GREM (GIAC Reverse Engineering Malware).

Many experts also come from the military, research, or offensive cybersecurity.

What is the salary of a Reverse Engineer?

• Junior (0–3 years): 45–55K€
• Mid-level (3–6 years): 55–75K€
• Senior / Expert (7+ years): 75–100K€+ depending on the sector (cyber defense, industrial security, research).

What career paths are possible?

The Reverse Engineer can move into roles such as:

• Offensive Security Expert / Defensive Security Engineer
• Cybersecurity Researcher / Security R&D
• Security Architect
• Cyber Threat Intelligence Analyst
• Cybersecurity CTO or independent consultant specialized in code analysis.