Job Overview
Location: Tokyo, Japan(On-board in China)
Scopely's Security team is looking for a Sr Client Security Engineer to build a new client security function in China. You will design and ship client/server-side protections for large-scale mobile games, combat sophisticated cheating ecosystems, and help ensure fair play for tens of millions of players.
What You Will Do
- Build, and grow the Client Security team in China, setting China specific technical direction, and operational best practices.
- Design, implement, and maintain client-side detections against third‑party cheating tools, modified clients, hooking frameworks, and emulators on Android and iOS .
- Own the client security integration into Scopely's internal anti-cheat platforms working closely with teams to ensure detections are actionable and scalable.
- Define and evolve the obfuscation and hardening strategy for China mobile builds (e.g., binary protection, anti-debugging, anti-tamper, integrity checks), including evaluating and integrating third‑party hardening vendors where appropriate.
- Build and maintain strong coverage for the China mobile ecosystem , including:
- distribution through multiple Android app stores and OEM devices,
- diverse OS/ROM variants and rooted/jailbroken environments,
- and local PC/emulator-based cheating patterns.
- Contribute hands-on code (C++ plus Java/Kotlin and/or Objective‑C/Swift) in security‑sensitive paths, including detection logic, integrity checks, and secure client–server protocols.
What You Will Need
- Experience in mobile security, game anti-cheat, or client-side security engineering, including time working directly on Android or iOS native code.
- Direct experience with reverse engineering.
- Deep hands-on experience with:
- Android and IOS internals
- hooking and instrumentation frameworks,
- and common mobile client security attack vectors.
- Strong proficiency in C/C++ and at least one mobile native language (Java/Kotlin for Android or Objective‑C/Swift for iOS), including experience shipping production code in large apps.
- Demonstrated experience designing and shipping client-side anti-cheat or integrity systems that integrate with server-side enforcement or analytics pipelines.
- Prior experience ing or technically directing a small engineering team
- Experience working with large-scale telemetry or anti-abuse pipelines and using data to tune detections and reduce false positives.
- Professional proficiency in both Mandarin and English, written and spoken
- Requires five days per week in the office
- Requires relocation to Tokyo
Bonus Points
- BS / MS in Computer Science or Software Engineering or equivalent
- Experience shipping and securing mobile games or other large-scale consumer apps specific to the China market, specific exposure to:
- multiple Android app-store ecosystems and OEM variations,
- desktop/mobile emulator usage patterns,
- and tooling development experience sp