Mobile SDK Engineer

AppsFlyer builds technology at massive scale, powering measurement, analytics, and fraud prevention across billions of mobile events every day. Join AppsFlyer’s Core SDK Team, responsible for building and maintaining the core mobile technology that powers AppsFlyer’s platform across millions of applications worldwide. The team develops high-performance, reliable, and secure SDK components used by developers globally. The Core SDK team operates across Android and iOS platforms, with a long-term vision of a unified mobile SDK engineering team. Engineers collaborate across platform boundaries while maintaining deep expertise in their primary mobile ecosystem. Operating at the intersection of mobile platforms and large-scale distributed systems, the team tackles complex challenges such as performance optimization, platform compatibility across thousands of devices, and maintaining highly reliable code that runs on billions of devices. As the team evolves, we are also expanding beyond traditional mobile development and scaling engineering capabilities with AI. This includes building and using AI-powered tooling, MCP-based systems, and agent-driven automation to improve developer productivity, testing, and SDK innovation. Engineers in the team therefore have the opportunity to work not only on mobile platform challenges, but also on emerging areas where mobile infrastructure, AI systems, and developer platforms intersect. What you’ll do Develop and maintain AppsFlyer mobile SDK features used by developers worldwide Design and implement reliable and performant SDK components across multiple mobile platforms and operating system versions Take ownership of end-to-end quality, including design, implementation, testing, and production reliability Debug and resolve complex issues across different devices, OS versions, and runtime environments Improve SDK performance, stability, and reliability at scale Develop and maintain SDK wrappers and integrations for cross-platform frameworks such as Unity, React Native, Flutter, and other mobile environments Work with modern AI-driven engineering tools, automation systems, and internal developer platforms Collaborate with engineers across mobile, backend, frontend, and platform teams Participate in code reviews and contribute to engineering best practices What you have B.Sc. in Computer Science or Software Engineering (or equivalent experience) 2–3 years of mobile development experience on Android or iOS Strong experience in one or more of the following: Kotlin, Java, Objective-C, or Swift. Solid understanding of Android SDK, Android Studio,Gradle, Xcode Experience developing and maintaining production-level mobile applications or SDK components Good understanding of software engineering fundamentals (OOP, design patterns, data structures) Experience debugging and troubleshooting mobile applications Very good English communication skills Strong ownership mindset and ability to learn and grow in a fast-moving environment Bonus points Experience with SDK or library development Experience working with cross-platform mobile frameworks (React Native, Flutter, Unity, etc.) Knowledge of Android performance optimization and memory management Experience working with CI/CD pipelines and automated testing Familiarity with mobile security concepts Experience working with AI-assisted development tools, agents, or automation systems Recommended by an AppsFlyer employee As a global company operating from 25 offices across 19 countries, we reflect the human mosaic of the diverse and multicultural world in which we live. We ensure equal opportunities for all of our employees and promote the recruitment of diverse talents to our global teams without consideration of race, gender, culture, or sexual orientation. We value and encourage curiosity, diversity, and innovation from all our employees, customers, and partners. “As a Customer Obsessed company, we must first be Employee Obsessed. We need to make sure that we p