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One Mount Group

Times City, 458 Minh Khai, Hà Nội

Company Size : 25-99

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Job Summary

  • 25-99
  • Product
  • Việt Nam

Senior Mobile Engineer Collaborator

One Mount Group

  • Hoàn Kiếm, Hà Nội
  • Negotiable
  •  Full Time
  •  English
  •  Experienced (Non-Manager)
2
1

  •  Posted:29/09/2026

  • Apply now
Senior Mobile Engineer Collaborator
Apply now
Technical Skill: Android , iOS , Swift , Java , C++ , Objective C , C , Android SDK , Networking , Multi-Threading , Mobile App , JVM , iOS SDK , React Native , Ecommerce , Kotlin , ARC , CPU , Flutter , System Architecture

Job description

Overview of 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;

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.

Job Requirement

  • 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).

Languages

    • English

    • Speaking: Intermediate - Reading: Intermediate - Writing: Intermediate

Technical Skill

  • Android
  • iOS
  • Swift
  • Java
  • C++
  • Objective C
  • C
  • Android SDK
  • Networking
  • Multi-Threading
  • Mobile App
  • JVM
  • iOS SDK
  • React Native
  • Ecommerce
  • Kotlin
  • ARC
  • CPU
  • Flutter
  • System Architecture

COMPETENCES

  • Proactive
  • Open minded
  • Ambitious
  • Research

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BUSINESS PROFILE

One Mount Group (1MG) goal is to build Vietnam’s largest-scale technological ecosystem.

1MG was established with the vision of promoting and contributing to the economy’s efficiency, creating a technology infrastructure for Vietnamese businesses to accelerate its value added, providing products to consumers at a more competitive cost of goods sold.

1MG is committed to building a strong and sustainable Vietnamese business, creating a broad playing field to nurture and grow future start-ups. We believe that from our core infrastructure the following “giant” businesses of Vietnam will be generated. The goal of 1MG is to build Vietnam’s largest-scale technological ecosystem with solutions in order to link, optimize and close the gaps of the value chain of focused economic sectors having strong growth in Vietnam.

With a sound financial position and business administration, 1MG has competitive advantages to attract and retain the best Vietnamese talents from all over the world.

MORE JOBS FROM THIS EMPLOYER

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Product Manager / Product Director

One Mount Group

  • Hoàn Kiếm, Hà Nội
  • Negotiable
  •  Full Time
  •  Manager
1
Posted: 08/09/2026
Skills: API, Ecommerce, Fintech, Amplitude, Google Analytics
  • 25-99
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Senior Information Security

One Mount Group

  • Hoàn Kiếm, Hà Nội
  • Up to 2500USD
  •  Full Time
  •  Experienced (Non-Manager)
1
Posted: 07/09/2026
Skills: Python, PowerShell, Bash, Bash, GCP, Cloudflare, Zero Trust, IAM, DNS, VPN, TCP/IP, DHCP, Firewall, IDS, MS Azure, IPS, AWS, WAF

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