Senior iOS App Developer for Mobile Offline Sync Program

LumenWorks

Project-based · Remote · Flexible hours

About the role

LumenWorks is launching a security hardening initiative for its cloud‑hosted applications. We need an iOS App Developer to audit, reinforce, and future‑proof our mobile client against emerging threats while maintaining seamless user experience.

Key responsibilities

• Conduct security reviews of existing iOS codebase and third‑party libraries
• Implement encryption, secure storage, and network hardening measures
• Integrate security‑focused testing tools and CI pipelines
• Collaborate with backend engineers to ensure end‑to‑end data protection
• Document security guidelines and provide knowledge transfer to the team

Must-have skills

• 5+ years of iOS development with Swift
• Deep understanding of iOS security best practices (Keychain, SSL pinning, data encryption)
• Experience consuming and securing REST APIs
• Proficiency with Xcode, Instruments, and automated testing

Nice to have

• Familiarity with cloud platforms (AWS, Azure) security features
• Experience with threat modeling and penetration testing for mobile apps