Mobile Software Engineer – Messaging Team

About the role

Join TikTok's Messaging team to build the next generation of mobile chat experiences. You will work on core features such as chatrooms, stickers, streaks, and real‑time voice and video calls, helping users connect and share moments directly from their smartphones.

Key responsibilities

• Develop and iterate client‑side Android and iOS messaging features, including chatroom, stickers, and streak interactions.
• Build and optimise real‑time voice & video call capabilities and the on‑device IM infrastructure (IMSDK, data management).
• Explore AI‑powered tools to improve development efficiency, create AI agents, and enhance cross‑platform consistency.
• Continuously improve client performance, stability, package size, and resource consumption.

Required profile

• Bachelor's degree or higher in Computer Science, Software Engineering, Electronic Information Engineering, or a related field.
• Strong learning ability, communication skills, and a sustained passion for technology.
• Excellent logical analysis and system abstraction skills; capable of debugging large, complex codebases.
• Experience or interest in AI coding tools and AI‑driven development workflows.

Required skills

• Proficiency in at least one mobile development stack: iOS (Objective‑C or Swift) or Android (Kotlin or Java).
• Familiarity with platform frameworks and client‑side IM infrastructure (IMSDK).
• Solid understanding of computer fundamentals such as data structures, algorithms, and operating systems.
• Experience with AI coding tools or AI‑assisted development environments.