Senior Software Engineer, Mobile SDK - Tokyo,Japan

About Appier Appier is an AI-native Agentic AI as a Service (AaaS) company that uses artificial intelligence (AI) to power business decision-making. Founded in 2012 with a vision of democratizing AI, Appier’s mission is turning AI into ROI by making software intelligent. Appier now has 17 offices across APAC, Europe and U.S., and is listed on the Tokyo Stock Exchange (Ticker number: 4180). Visit www.appier.com for more information. About the Team We are a high-ownership, hybrid, and international team based in Taipei and Tokyo. We own all five SDK surfaces—iOS, Android, React Native, Flutter, and Web—which serve as the critical integration layer for enterprise clients with millions of daily active users. We operate with an AI-first engineering mindset within a Scrum/Gitflow workflow. We offer a flexible hybrid work model in Taipei/Tokyo CBDs, competitive benefits, and a dedicated budget for your AI tooling and continuous learning. About the role This is a hands-on, high-ownership senior role focused on building, maintaining, and architecting Appier's unified mobile growth stack. You will bridge engagement technologies with monetization and measurement solutions, ensuring high performance, cross-platform consistency, and privacy-first standards while driving AI-assisted engineering innovations. Responsibilities Architect Cross-Platform SDKs: Design features and developer-friend...