Mobile Engineer

Responsibilities1. Develop native enterprise IM app (iOS/Android).2. Mobile architecture; optimize performance, battery, traffic, startup.3. Stable backend communication.4. Resolve mobile compatibility issues.5. Collaborate with backend/product/testing for quality delivery. Requirements1. Bachelor's degree or above in Computer Science or related fields; 3+ years native iOS or Android.2. iOS: Swift/ObjC; Android: Kotlin/Java; UI optimization, multithreading, memory.3. IM/social/RTC experience preferred; WebSocket/MQTT/APNs/FCM.4. Mobile security (encryption, cert validation), network optimization (weak network), monitoring.5. Coding standards, unit testing, problem-solving.6. Good communication, learning, teamwork.