Mobile Engineer

Responsibilities 1. 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. Requirements 1. 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.