Fraud Prevention Engineer (f/m/d)

About this role

adjoe builds the technologies behind mobile apps growth and monetization. With our core product Playtime Arcade, we’ve become the global leader in rewarded advertising, an ad unit built on a simple premise: users earn real in-app rewards for engaging with new apps. The result is one of the most effective value exchanges in adtech, connecting advertisers and publishers with over 770 million users annually. Ensuring Authenticity for Billions of Daily Rewards Industry reports suggest 25 percent of global mobile ad spend is lost to fraudulent activities like click farms, fake installs, SDK spoofing, and emulator farms.

At adjoe, we define our platform through trust and proactive engineering. We build high-performance defenses that guarantee accurate reward attribution, ensuring every interaction is authentic. This creates a sustainable value exchange that empowers our partners to grow with confidence. The Anti-Fraud team develops systems that detect and prevent malicious activity at scale. Our custom Android and iOS SDKs analyze device integrity for modifications like Xposed frameworks, Magisk modules, and jailbroken devices.

Supporting these, Go microservices and DynamoDB deliver millisecond-level responses, while Kafka and SQS process billions of daily events in real time. This infrastructure protects publisher margins and ensures a trustworthy platform for all users. YOUR MISSION & WHO WE ARE LOOKING FOR: - AdTech Domain & Anti-Fraud Core Requirement You bring a solid foundation in the AdTech ecosystem (publishers, advertisers, SDK attribution, monetization) and direct exposure to cheating in mobile games.

Joining our Anti-Fraud Operations unit, you will act as the primary technical PoC for Support, Sales, and BI teams, owning complex fraud escalations and translating business edge cases into technical fixes. - Investigative Mindset & Root-Cause Analysis You possess eagle-eyed curiosity and an investigative, hacker mindset. When publisher margins drop, external platforms (iOS/Android) shift, or campaigns misbehave, you won't wait for step-by-step instructions—you will connect messy clues, reproduce exploit scenarios, and trace non-obvious fraud patterns to their source.