iOS Security Engineer – AppGuard & DSL Engine

TikTok USDS Joint Venture; San Jose (CA); On-site; USD 187,000 - 360,000; Full time

Job summary

TikTok USDS Joint Venture LLC is seeking a Software Engineer to lead the design and development of AppGuard for Apple platforms, focusing on monitoring and managing egress/ingress traffic on iOS and macOS. You will be a key contributor in a greenfield environment, applying high-performance engines and DSL to ensure application assurance.

The role requires 3+ years in Apple platform development, strong Objective-C/Swift expertise, and a track record of memory, network, and battery optimization.

Qualifications

• BS/MS degree in Computer Science, Engineering, or a related field.
• 3+ years of experience in mobile and desktop app development for Apple platforms.
• Expertise in Objective-C and Swift, with a deep understanding of Darwin-based frameworks and system-level tools.
• Performance Optimization: Proven experience with memory management, network optimization, and battery efficiency.

Responsibilities

• Architect Security Solutions: Take ownership of the technical direction for AppGuard, from initial design to implementation on iOS and macOS.
• Traffic & Policy Control: Develop capabilities to monitor and cut-off application traffic based on dynamic rule updates and sampling
• Performance Engineering: Implement high-performance engines to execute DSL-based logic for real-time security judging.
• Tooling Development: Design and develop associated platforms for the integration, testing, validation, and profiling of sandbox components.
• Collaborate Cross-Functionally: Work with stakeholders to ensure security solutions meet operational needs without compromising user experience.

Skills

Objective-C

Swift

Security engineering

Performance optimization

Education

BS/MS degree in Computer Science, Engineering, or a related field.

Job description

TikTok USDS Joint Venture LLC is seeking a Software Engineer to lead the design and development of AppGuard for Apple platforms, focusing on monitoring and managing egress/ingress traffic on iOS and macOS. You will be a key contributor in a greenfield environment, applying high-performance engines and DSL to ensure application assurance.

The role requires 3+ years in Apple platform development, strong Objective-C/Swift expertise, and a track record of memory, network, and battery optimization.