Game Security Software Engineer

KRAFTON•El Segundo, CA

About The Position

KRAFTON is dedicated to identifying and publishing games worldwide that offer a uniquely enjoyable experience, crafted by our globally recognized production studios known for their distinctive creativity. We continuously push the boundaries of gaming enjoyment by embracing new challenges and technologies and expanding our platforms and services to captivate an even larger fan base. Best known for the genre-defining worldwide sensation PUBG: Battlegrounds, our stellar studios based across the globe include PUBG Studios, Striking Distance Studios, Unknown Worlds, Bluehole Studio, RisingWings and more. In collaboration with our passionate and driven team, we strive to establish ourselves as a renowned creator of masterpieces in the global gaming market. We develop, apply, and operate game security solutions and security operations systems to create a trusted gameplay environment for KRAFTON games. Centered around KRAFTON Security Services (KSS), we provide core capabilities and services required for game security, including Anti-Cheat, Anti-Tamper, security operations, data analysis, and ML-based detection. KSS is a Game Trust Platform that integrates KRAFTON’s game security technologies and operational capabilities. It is evolving into a standardized security platform that multiple game studios can adopt quickly and reliably.

Requirements

Strong C++ software development skills
Experience developing Windows-based client software, or equivalent understanding
Understanding of Windows internals, including processes, threads, virtual memory, synchronization, DLLs, and PE structures
Ability to understand x64 assembly code and analyze the behavior of disassembled code
Understanding of core operating system concepts such as kernels, drivers, system calls, interrupts, and memory management
Basic knowledge of computer architecture, CPU operation, memory structure, and executable file loading processes
Ability to analyze problems from a security perspective and design solutions while considering potential bypass methods

Nice To Haves

Experience developing Anti-Cheat, DRM, EDR, security solutions, or client protection technologies
Experience developing Windows kernel drivers
Understanding of x86/x64 assembly, calling conventions, exception handling, and debugging techniques
Experience using analysis/debugging tools such as IDA, Ghidra, WinDbg, and x64dbg
Understanding of techniques such as code injection, API hooking, manual mapping, DKOM, rootkits, anti-debugging, and anti-tamper
Understanding of Windows platform security technologies such as TPM, Secure Boot, VBS, and HVCI
Experience operating security features reliably in large-scale live game environments
Experience in low-level system programming with consideration for performance, stability, and compatibility

Responsibilities

Develop KSS Anti-Cheat and client security features to detect and respond to cheats, tampering, bypasses, automation, and unauthorized tools that may occur in game runtime environments.
Based on an understanding of user-mode and kernel-mode behavior in Windows environments, you will analyze security threats that occur between game clients and the operating system, and design and implement security features with stability and performance in mind.
Develop C++-based game security / Anti-Cheat client modules
Detect and respond to cheat behaviors such as game client tampering, memory manipulation, code injection, hooking, debugging, and automation tools
Design and implement user-mode and kernel-mode security features
Conduct security analysis based on Windows internals and OS behavior, including processes, threads, memory, drivers, and system calls
Review and improve the stability, performance, and false-positive risk of security detection logic
Analyze new cheat and attack techniques and research defensive technologies
Provide technical support and improvements to ensure KSS security features are reliably applied across various game environments