Hồ Chí Minh
Full-time
As a member of the Platform Team, your primary responsibility is to develop and maintain core instant systems (real-time/instant experiences) with a strong emphasis on deep technical know-how and algorithmic/problem-solving capability.
This role is open to candidates with a strong mobile background in either iOS or Android.
What you will do
Design, develop, and optimize high-performance mobile platform components and core functionalities (iOS/Android), with minimal reliance on third-party libraries.
Tackle complex technical challenges using strong algorithmic and analytical skills, ensuring performance, reliability, and scalability at the platform level.
Continuously explore and integrate new technologies, frameworks, and best practices to enhance Zalo’s instant platform efficiency and developer productivity.
Collaborate with cross-functional teams (Product, Design, Backend, QA, etc.) to implement and refine product features with a platform-first mindset (reusable, stable, long-term maintainable).
What you will need
Must have:
2+ years of software development experience with strong exposure to core system architecture and platform-level thinking.
Strong proficiency in either Android (Java/Kotlin, Android SDK, app/framework internals, tooling) or iOS (Swift/Objective-C, iOS SDK, runtime fundamentals, tooling)
Solid knowledge of algorithms, data structures, and OOP.
Hands-on experience with memory management and multithreading/concurrency:
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Android: JVM/ART memory behavior, threading, concurrency primitives
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iOS: ARC, retain cycles, GCD/OperationQueue/Swift Concurrency
Experience in performance optimization (profiling, tracing, CPU/memory/battery/network optimization) is highly desirable.
Proactive, open-minded, strong sense of ownership, and eager to learn and grow.
Nice to have* C/C++ knowledge (useful for low-level system work, performance-critical modules, native integrations).
Familiarity with the core functionality of cross-platform frameworks such as Flutter or React Native (integration patterns, performance trade-offs).
Strong research skills with the ability to quickly adapt to technologies beyond mobile (e.g., networking/real-time systems, runtime optimization, platform tooling).