Senior Software Engineer (Mobile) - iOS

About the role

As a Senior Software Engineer – Mobile (iOS), you will be responsible for the design and development of Qualgo’s iOS applications. You will play a critical role in ensuring high performance, scalability, security, and a world-class user experience. You will work closely with other engineers, product managers, designers, and QA specialists to deliver innovative and impactful mobile solutions. You will be a hands-on contributor, writing code, reviewing code, and mentoring other engineers.

Responsibilities

Hands-on development

• Design, build and maintain end-to-end implementations that protect user privacy and daily activities on digital platforms across the Apple ecosystem
• Collaborate with cross-functional teams (Product, QA, Backend, SOC, etc.) to deliver secure, high-performance implementations aligned with the team’s strategy
• Conduct code reviews to ensure code quality and adherence to best practices

Performance optimization

• Identify and address performance bottlenecks in iOS applications
• Research Apple’s privacy frameworks to ensure solutions are effective and policy compliant

Additional responsibilities

• Build secure mobile solutions with strong understanding of encryption, secure storage, and anti-tampering techniques
• Apply modern iOS architecture patterns (Clean Architecture / modularization) to build scalable and maintainable protection modules
• Ensure thread safety and performance using Swift Concurrency (actors, Sendable, structured concurrency)
• Integrate with backend-driven threat intelligence systems and continuously update on-device protection logic
• Implement observability, logging, and monitoring systems to track app performance and security effectiveness
• Contribute to automated testing strategies, including edge-case and security-related scenarios
• Mentor and coach junior engineers, helping them grow their iOS skills

Requirements

• Bachelor’s degree in Computer Science, Engineering, or a related field
• 5+ years of experience developing iOS applications in Swift (SwiftUI and UIKit)
• Practical experience with SwiftUI
• Experience with Swift Concurrency, Combine, or reactive frameworks
• Experience with architectural patterns (e.g. MVVM, VIP, Clean Architecture)
• Experience with testing frameworks (e.g. Swift Testing)
• Experience building large-scale, high-performance iOS applications
• Experience with CI/CD, unit/UI testing, and performance profiling tools (e.g. Instruments, Xcode profiler)
• Proven experience designing and implementing robust networking layers (REST, WebSockets, gRPC, GraphQL, etc.)
• Good understanding of security best practices: SSL pinning, certificate management, secure data storage, authentication flows
• Familiarity with background networking, offline support, and data synchronization
• Excellent problem-solving, debugging, and analytical abilities
• Good communication and collaboration skills

What you'll get

• Meaningful work protecting users’ data
• Competitive pay and recognition
• Hands-on learning, extra leave, and premium healthcare for you and your family
• Modern workspace built for teamwork and innovation
• Young, dynamic environment where ideas are welcome

Based in Ho Chi Minh City, Vietnam (Qualgo Technologies Vietnam Co., Ltd.). Apply via Qualgo Careers.