Software Engineer II - iOS

You will:

• Design, build, and maintain secure and reusable iOS components & SDKs for authentication and trust.
• Drive adoption of modern authentication technologies such as passkeys, biometrics, device attestation, and trusted device frameworks.
• Proactively identify and resolve potential security, privacy, and performance issues in the mobile app ecosystem.
• Collaborate with backend, security, and product teams to design end-to-end trust features and protocols.
• Champion modular, testable, and robust architecture that supports scalability and cross-team contributions.
• Stay ahead of the curve by evaluating and proposing new iOS capabilities and technologies to improve user security and experience.
• Mentor engineers, conduct code reviews, and help shape iOS engineering best practices.
• Monitor production performance and reliability, driving improvements in stability and resilience.

You have:

• 5+ years of experience in iOS application development, with deep knowledge of the iOS ecosystem.
• Strong command of Swift, with a solid grasp of iOS frameworks, concurrency, and modern architectural patterns (e.g., Clean Architecture, MVVM, VIPER).
• Hands-on experience with authentication and security technologies on iOS (Face ID/Touch ID, Keychain, passkeys, secure enclave, Play Integrity/DeviceCheck, app attestation, etc.).
• Understanding of networking security (SSL pinning, OAuth, JWT, encryption) and secure data storage practices.
• Track record of designing and delivering complex features or systems in large-scale consumer apps.
• Familiarity with mobile CI/CD pipelines, automated testing, and monitoring tools.
• A passion for writing clean, maintainable, and well-tested code, with a focus on reliability and user trust.
• Bonus: Experience with fraud prevention, identity verification, or trust & safety systems.

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About Carousell

Carousell Group is the leading multi-category platform for secondhand in Greater Southeast Asia on a mission to make secondhand the first choice. Founded in August 2012 in Singapore, the Group has a leading presence in seven markets under the brands Carousell, Carousell Media Group, Cho Tot, Laku6, LuxLexicon, Mudah.my, OneShift, REFASH and Revo Financial, serving tens of millions of monthly active users.

About the RoleThe Trust Engineering team safeguards our marketplace by building secure, reliable, and user-friendly systems that protect our users and their transactions. We are looking for a Senior iOS Engineer to strengthen our authentication and trust experiences across the Carousell Group.
You will design and build secure, scalable, and high-quality iOS systems that power login, account protection, and fraud prevention. You will play a key role in shaping how we adopt new technologies in authentication (e.g., passkeys, biometrics, device attestation, secure storage) and help improve the overall security posture of our apps.
This is a hands-on senior role where you’ll not only write high-quality code but also propose enhancements, lead technical discussions, and guide best practices across the iOS ecosystem.