Senior Mobile Engineer Collaborator

Top 3 Reasons To Join Us Môi trường đẩy nhanh phát triển năng lực Nơi quy tụ nhân tài người Việt trên toàn cầu Văn hóa thành công, đề cao sáng kiến The Job We are looking for an experienced Senior Mobile Engineer Collaborator (IOS/Android) to join our product team. This is a fantastic opportunity to join One Mount Group, a well-established, leading start-up in Vietnam. As part of One Mount's mission to become a leading technology ecosystem in Vietnam, our team is building a revolutionary fintech platform. We are dedicated to providing the most convenient and comprehensive financial and payment services for customers, driving the digital transformation of Vietnam's financial landscape. Work Location: Hanoi Level: Senior Quantity: 02 (01 IOS & 01 Android) RESPONSIBILITIES: 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 platform efficiency and developer productivity; Your Skills and Experience 5+ years of experience, including 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); Hands-on experience with memory management and multithreading/concurrency: Android: JVM/ART memory behavior, threading, concurrency primitives, 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). Why You'll Love Working Here Salary & Allowances Competitive monthly salary aligned with the market; Provided with a laptop, screen, and other necessary equipment/accounts/tools for work; Opportunity to participate in mega-events across the Ecosystem (Techcombank - One Mount - Masterise Group) with high-value rewards; Career Growth Free learning sources on Udemy, O'Reilly platforms; internal workshops, certification sponsorship, and exclusive mentoring from C-levels; Recognition and awards at team and organizational levels; Working Environment Open & collaborative working space fosters both individual focus and teamwork activities; Young, dynamic, and collaborative working atmosphere; Unwind zones: gaming, table tennis, yoga, gyms, bathrooms, sleep corner; Quarterly/yearly team-building & engaging internal events.