Senior Mobile Engineer, iOS

Remotedxb; Dubai; On-site; AED 320,000 - 520,000; Full time

Job summary

Thunderbird is seeking an experienced Senior Mobile Engineer to lead development of its mobile products and platform architecture in Dubai. You will tackle performance, reliability, and cross-platform integration while strengthening security and accessibility across the stack.

Importantly, you will contribute to refining code quality, conducting thorough testing, and guiding architectural improvements. Strong Swift/SwiftUI skills and Git proficiency are essential for success.

Qualifications

• 7+ years of professional software development experience.
• 2+ years in a Senior Software Engineer role.
• 3+ years of professional mobile application development experience.
• Strong experience with Swift, SwiftUI, and iOS frameworks.
• Deep knowledge of iOS architecture, design patterns, and performance optimization.
• Experience addressing technical debt and refactoring complex codebases.
• Strong knowledge of mobile security, including encryption and secure storage.
• Experience with communication and email protocols (RSS, IMAP, POP, or Matrix).
• Advanced proficiency with Git.
• Excellent async written communication skills.

Responsibilities

• Build and refine Thunderbird's mobile products and platform architecture.
• Improve scalability, performance, reliability, and user experience.
• Develop a deep understanding of the codebase and architecture to make changes across the entire stack.
• Maintain strong debugging and testing practices across unit, integration, and automated testing.
• Review code and guide improvements to architecture, testing, and development best practices.
• Independently resolve complex issues involving performance, security, and cross-platform integration.
• Monitor application health and address issues before they escape.
• Document technical decisions, system architecture, and team processes.
• Own assigned projects from investigation through delivery.
• Ensure mobile development meets accessibility, security, and privacy standards.

Skills

Swift

SwiftUI

iOS frameworks

Performance optimization

Mobile security

Open-source familiarity

Async written communication

Tools

Git

Job description

About the Company

Thunderbird is one of the world's most trusted open-source email applications, empowering more than 20 million people globally. MZLA, the team behind Thunderbird, builds privacy-respecting communication and productivity tools that help people manage their digital lives while staying in control of their data.

Responsibilities

• Build and refine Thunderbird's mobile products and platform architecture
• Improve scalability, performance, reliability, and user experience
• Develop a deep understanding of the codebase and architecture to make changes across the entire stack
• Maintain strong debugging and testing practices across unit, integration, and automated testing
• Review code and guide improvements to architecture, testing, and development best practices
• Independently resolve complex issues involving performance, security, and cross-platform integration
• Monitor application health and address issues before they escape
• Document technical decisions, system architecture, and team processes
• Own assigned projects from investigation through delivery
• Ensure mobile development meets accessibility, security, and privacy standards

Requirements

• 7+ years of professional software development experience
• 2+ years in a Senior Software Engineer role
• 3+ years of professional mobile application development experience
• Strong experience with Swift, SwiftUI, and iOS frameworks
• Deep knowledge of iOS architecture, design patterns, and performance optimization
• Experience addressing technical debt and refactoring complex codebases
• Strong knowledge of mobile security, including encryption and secure storage
• Experience with communication and email protocols (RSS, IMAP, POP, or Matrix)
• Advanced proficiency with Git
• Excellent async written communication skills

Preferred Qualifications

• Familiarity with Apple App Store and Google Play Store compliance guidelines
• Experience contributing to open-source projects or communities
• Proficiency in French, German, or Japanese