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Senior Mobile Engineer at 12Go Asia. Connect with us to connect the world. Are you prepared to join the R&D team at 12Go and help us build the leading online travel platform, providing seamless booking experiences for travelers worldwide? . 12Go, being a part of . Travelier. group, offers a wide range of transportation options, including trains, buses, ferries, and flights, to help customers travel conveniently and affordably. Our vision is to enable any customer to instantly book any route in the world.. In our R&D department you will get to work on groundbreaking solutions that reshape how people explore the world, using a modern tech stack and following top industry standards to ensure security, scalability, and a reliable travel experience. You will thrive in a collaborative culture where passionate colleagues love sharing ideas, and your work will have a real impact on our users' travel adventures.. Join us in crafting this exciting journey, where your contribution will be key to our success!. Responsibilities:. -Act as the Mobile Expert within the Marketing team;. -Leading all mobile-related marketing initiatives.. -4+ years of experience building and maintaining production-grade client applications in JavaScript/TypeScript, with demonstrated ownership and significant impact on development, deployment, and monitoring;. -2+ years of hands-on experience delivering hybrid/cross-platform production mobile apps using at least one of the following technologies: Capacitor, Cordova, React Native, Flutter;. -Ability to debug hybrid mobile applications end-to-end — including native iOS/Android layers, WebView interactions, and complex flows with in-app browsers and third-party SDKs — as well as validate and trace data flows across analytics, attribution, ad platforms, and backend systems;. -Experience with performance optimization — e.g., rendering efficiency, startup time, and WebView resource usage;. -Confident experience with app analytics and attribution SDKs (e.g., Google Analytics, AppsFlyer, CleverTap, Datadog, Amplitude);. -Understanding of privacy and consent requirements (GDPR, ATT, Consent Mode, CMP/UMP SDKs).. Nice to Have:. -. Knowledge of platform-specific attribution frameworks (e.g., SKAdNetwork, Google Play Install Referrer);. -Production experience in native iOS and Android development (Swift/Kotlin/Java);. -Familiarity with server-to-server event forwarding and reconciliation between backend and analytics platforms;. -Experience with feature-flag systems (e.g., GrowthBook, LaunchDarkly, Unleash or similar) and staged rollout of SDK integrations;. -Background in crash/performance monitoring (e.g., Firebase Crashlytics, Sentry) and setting up alerting for SDK/analytics health;. -Curious about new AI technologies that improve productivity.. Company Location: Indonesia.