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Develop native Android and iOS components (Kotlin/Swift) and backend integration points for proximity communication, payment flows, and secure transaction handling. - Proactively participate in secure code review, remediation, threat modeling, and security testing across the development lifecycle. - Design and implement developer-friendly APIs and modular SDK components with strong error handling, observability, and comprehensive validation through unit tests and functional tests - Native mobile development for Android and iOS (Kotlin/Swift);
experience with optional cross-platform options (React Native, Flutter) when appropriate. - Hands-on experience with secure handling of sensitive data, and resilient transaction workflows. - Ability to design and implement secure, modular SDK components and developer-friendly APIs. - Experience with automated testing (unit, integration, security testing) and threat modeling.