Senior Mobile Engineer: Security‑Focused Cross‑Platform Apps

United Asia Finance Ltd.; Hong Kong; On-site; HKD 550,000 - 950,000; Full time

Benefits offered by this job

Double Pay

Performance Bonus

Life and Accident Insurance

Medical Benefits

Annual Leave

Birthday Leave

Job summary

United Asia Finance Ltd. is seeking an experienced mobile security engineer to design, develop and deploy iOS and Android apps with strong emphasis on security.

You will integrate modern security controls, work with cross‑functional teams, and ensure compatibility with Promon Shield and other secure development practices. The role requires hands‑on knowledge of Flutter/React Native, native Android/iOS development (Kotlin/Swift), and cloud services (AWS/Azure/Google Cloud).

Qualifications

• Experience integrating Promon Shield or similar mobile security platforms.
• Experience in banking, fintech, or regulated industries.
• Knowledge of mobile application security, OWASP Mobile Top 10, certificate pinning, biometric authentication, device integrity checks, and root/jailbreak detection.
• Experience with AWS, Azure, or Google Cloud.
• Knowledge of Android native (Kotlin) and iOS native (Swift).

Responsibilities

• Design, develop, test, and deploy mobile apps for iOS and Android.
• Build cross-platform apps using Flutter and React Native.
• Integrate RESTful APIs, GraphQL services, and third‑party SDKs.
• Implement mobile application security controls and protections, including Promon solutions.
• Optimize performance, scalability, and security for mobile apps.
• Collaborate with backend engineers, UX/UI designers, product owners, and security teams.
• Participate in code reviews and CI/CD pipeline improvements.
• Troubleshoot production issues and provide ongoing support.

Skills

Promon Shield

Banking sector

Mobile security

OWASP Mobile Top 10

Certificate pinning

Biometric authentication

Device integrity

Root/Jailbreak detection

Cloud platforms

Kotlin

Swift

Tools

Promon Shield

AWS

Azure

Google Cloud

Android Studio

Xcode

Job description

United Asia Finance Ltd. is seeking an experienced mobile security engineer to design, develop and deploy iOS and Android apps with strong emphasis on security.

You will integrate modern security controls, work with cross‑functional teams, and ensure compatibility with Promon Shield and other secure development practices. The role requires hands‑on knowledge of Flutter/React Native, native Android/iOS development (Kotlin/Swift), and cloud services (AWS/Azure/Google Cloud).