Sr.Client Security Engineer

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 specific for china mobile games 
• Previous CTF experience, and CVE contributing experience
• Prior work on client obfuscation / hardening pipelines, including vendor evaluation and integration, and handling performance and stability tradeoffs.
• Familiarity with large-scale cloud environments, streaming data processing, and monitoring/alerting

About Scopely

Scopely is a leading video game and global interactive entertainment company, home to many of the world’s most beloved and enduring experiences, including two of the most successful mobile games of all-time “MONOPOLY GO!” and “Pokémon GO,” along with “Stumble Guys,” “Star Trek™ Fleet Command,” “MARVEL Strike Force,” “WWE Champions,” the Scrabble® franchise, “Yahtzee® With Buddies,” and many others. Across mobile, web, PC, and console, Scopely creates, develops, publishes, and live-operates one of the most diversified and award-winning portfolios in the games industry - bringing hundreds of millions of players together through a shared love of play.

Founded in 2011, Scopely is powered by its exceptional team - including thousands of world-class gamemakers around the globe, a distinctive tenet-driven culture, and its proprietary technology platform, Playgami. Together, these strengths have fueled Scopely’s position as the #1 mobile games company in the U.S. and #2 globally, generating more than $10 billion in lifetime revenue. Whether building global sensations like “MONOPOLY GO!” from the ground up, or expanding through strategic acquisitions, including the FoxNext, GSN, and Scopely Explore games businesses - Scopely consistently delivers experiences players love today and return to for years to come.

Recognized multiple times as one of the "100 Most Influential Companies in the World" by TIME magazine and one of Fast Company's "World's Most Innovative Companies" and “Best Workplaces for Innovators,” Scopely believes that video games can be a force for good - creating meaningful connections, vibrant communities, and making life better through play.

Scopely has global operations and partners across four continents in more than a dozen countries worldwide. For more information, visit: https://www.scopely.com/. 

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Employment at Scopely is based solely on a person's merit and qualifications. Scopely does not discriminate against any employee or applicant because of race, creed, color, religion, gender, sexual orientation, gender identity/expression, national origin, disability, age, genetic information, veteran status, marital status, pregnancy or related condition (including breastfeeding), or any other basis protected by law. We also consider qualified applicants with arrest or conviction records, consistent with applicable federal, state and local law.