Senior Mobile Engineer Collaborator (IOS/Android)

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

Job description

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.