Game Penetration Tester

Cyrex; Rio de Janeiro; On-site; BRL 111,600 - 156,240; Full time

Benefits offered by this job

Opportunity to work on diverse gaming projects

Collaborate with creative professionals

Competitive salary

Training and professional self-improvement opportunities

Job summary

A media and tech start-up in Rio de Janeiro is seeking a Mid-Senior level Penetration Tester to join their team. The role includes performing penetration tests, reverse engineering, and developing internal tools for the gaming industry. Ideal candidates will have over 5 years of experience, strong skills in C++ and Python, and knowledge of networking protocols. This full-time position offers a competitive salary and opportunities for ongoing training in a dynamic environment.

Qualifications

• 5+ years in penetration testing or reverse engineering.
• Strong modern C++ and Python experience.
• Networking: TCP/UDP fundamentals and protocol design.

Responsibilities

• Perform penetration tests on PC, mobile, and console games.
• Reverse engineer game binaries and network protocols.
• Bypass client-side protections.

Skills

C++ programming

Reverse engineering

Penetration testing

Networking protocols

Python

Basic web hacking knowledge

Tools

Wireshark

mitmproxy

Scapy

IDA

Ghidra

x64dbg

WinDbg

LLDB

Job description

Cyrex, a Magic Media company, is a media and tech start-up powered by creativity and innovation. We work with leading developers and publishers in the games industry, providing support and solutions designed around individual needs and carried out by global experts. We produce high-quality results by constantly staying at the forefront of modern technology and cutting-edge processes and practices. The best of our team are known for their strong initiative, not just in taking care of their day-to-day responsibilities but in helping identify ways to build, grow, and do more in their work.

We’re currently looking for a dynamic addition to the team to help work on exciting cybersecurity and development projects for the video games industry. The ideal candidate will work with cross-functional teams to develop critical products and services for our clients and offer excellent technical support to our teams. If you're an enthusiastic, motivated, and lateral thinker, our team is waiting to meet you!

This is a full-time position. The role requires strong low-level technical skills, such as C++ programming, working with network protocols, or reverse engineering. If your experience is mainly in web hacking, you should instead apply for the on-demand penetration testing position, which focuses more on web security.

Responsibilities

• Perform penetration tests on PC, mobile, and console games
• Reverse engineer game binaries and network protocols to identify vulnerabilities
• Bypass client-side protections (SSL pinning, anti-cheat, packing/obfuscation)
• Develop and maintain internal tools and PoCs (C++, Python)

Requirements

• 5+ years in penetration testing, reverse engineering or security research
• Strong modern C++ and Python experience
• Networking: TCP/UDP fundamentals (fragmentation, sequencing, multiplexing) and protocol design/mapping. Experience with Wireshark, mitmproxy and Scapy
• Data/crypto basics: endianness, checksums, hashing, encoding, encryption/signing, bitmasks
• Serialization: binary formats and var-length encodings
• Binary exploitation (practical): crash triage, UAF/OOB/heap/stack, info leaks, ROP/JOP
• Minimal RE capability: read disassembly when needed; use IDA/Ghidra and x64dbg/WinDbg/LLDB to support testing (deep reversing not required)
• Basic web hacking knowledge

Working Knowledge Of

• Unreal Engine (UE4/UE5, UE4SS), Unity, dnSpy, il2cpp

Benefits

• An opportunity to hone and improve your skills by applying them to a diverse variety of gaming projects
• The chance to work closely with a team of like-minded creative professionals in a fast-paced, multicultural environment on a variety of gaming projects
• A competitive salary
• Ongoing training and professional self-improvement opportunities

Seniority level

Mid-Senior level

Employment type

Full-time

Job function

Other

Industries: IT Services and IT Consulting

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If this sounds interesting to you and you'd like to be at the forefront of cybersecurity, we'd love to hear from you.