Lead UX/UI Designer (all genders)
Location: Berlin (Hybrid) · Category: Product & Design · Seniority: Lead · Posted: July 3, 2026 · Verified: Sep 28, 2026
Role Overview & Description
About the company
JustPlay
justplayapps.comRewarded mobile gaming platform funded by in-app advertising.
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More Positions at JustPlay
2 more open roles
This role leads and scales quality assurance for JustPlay's core app platform, splitting time between hands-on QA work and leading the QA chapter. The lead will drive AI-driven testing and automation strategies, implement regression testing with tools like Maestro, Espresso, XCTest, and Appium, and use contract testing (Pact) to validate backend integrations. The role requires 5+ years of mobile QA experience with at least 2 years in a leadership capacity.
This role owns fraud prevention strategy for JustPlay's loyalty gaming ecosystem, designing and implementing systems to detect and prevent fraud across user journeys. The product manager will develop real-time detection mechanisms, anomaly analytics, and proactive interventions while prioritizing KPIs like false positives and chargeback rates. Requires 4+ years of product management experience with strong AdTech or ad monetisation background and proficiency in A/B testing for risk scenarios.
