Senior Game Security Software Engineer

KRAFTON Americas; El Segundo (CA); On-site; USD 146,000 - 200,000; Full time

Job summary

KRAFTON Americas is seeking a Senior Game Security Software Engineer to develop KSS Anti-Cheat and client security features, focusing on detecting cheats, tampering, and automation in game runtimes. You will work on Windows user-mode and kernel-mode security, analyzing threats between game clients and the OS.

This role requires deep knowledge of Windows internals, memory management, and x64 assembly, with hands-on development in C++ and experience with security tooling such as IDA and WinDbg.

Qualifications

• 5+ years of C++ software development skills.
• 5+ years of experience with low-level Windows development focused on security / anti-cheat.
• Understanding of Windows internals: processes, threads, memory, DLLs, PE structures.
• Ability to understand x64 assembly and analyze disassembled code.
• Understanding of kernels, drivers, system calls, interrupts, and memory management.
• Knowledge of computer architecture, CPU operation, memory, and executable loading.
• Ability to analyze security problems and design bypass-resistant solutions.

Responsibilities

• Develop C++-based game security / Anti-Cheat client modules.
• Detect and respond to cheat behaviors like client tampering and memory manipulation.
• Design user-mode and kernel-mode security features.
• Analyze Windows internals and OS behavior; review security detection logic.
• Research new cheats and defensive technologies; reduce false positives.
• Provide technical support to apply KSS security across game environments.

Skills

C++

Windows kernel

Anti-Cheat security

Security analysis

Performance optimization

Tools

IDA

Ghidra

WinDbg

x64dbg

Job description

THE COMPANY

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.

THE OPPORTUNITY

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.

DUTIES

We are looking for a Senior Game Security Software Engineer to 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.

RESPONSIBILITIES

• 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

QUALIFICATIONS

• 5+ years of C++ software development skills
• 5+ years of experience with low-level Windows development expertise focused on working on security and/or anti-cheat. Experience developing Anti-Cheat, DRM, EDR, security solutions, or client protection technologies in a gameplay environment strongly preferred.
• 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

PREFERRED QUALIFICATIONS

• 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

Reasonable Accommodation

KRAFTON Americas is committed to the full inclusion of all qualified individuals. As part of this commitment, the Company will ensure that persons with disabilities are provided reasonable accommodations. If reasonable accommodation is needed to apply for an open position, perform essential job functions, and/or to receive other benefits and privileges of employment, please contact the HR Talent team at KRAFTON Americas, to begin the interactive process.

EEOC statement

KRAFTON Americas provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type.

In California, the expected salary range for this position is $146,000-$200,000. The listed expected salary range represents a good faith estimate and the actual pay may depend on a variety of job-related factors that can include experience, education, skills, and location.