Senior Kotlin Developer (Mobile)

We are looking for a Kotlin Multiplatform Engineer to join a security-focused initiative within a large international organization. The project is centered around implementing Zero Trust Architecture principles in mobile applications, with a strong emphasis on secure authentication, identity management, and runtime protection. You will work closely with security architects and cross-functional teams to build secure, scalable, and high-quality mobile solutions.

• Strong experience with Kotlin and mobile development (Android or cross-platform)
• Hands-on experience with Kotlin Multiplatform Mobile (KMM)
• Solid understanding of authentication and authorization protocols (OAuth 2.0, OpenID Connect)
• Experience working with identity providers and secure session/token management
• Good understanding of mobile security best practices
• Experience implementing or working with Zero Trust Architecture principles
• Familiarity with secure storage solutions on mobile platforms
• Strong problem-solving skills and attention to detail
• Good command of English (B2+)

Nice to have:

• Experienced in using AI tools in day-to-day workflow
• Experience with mobile security frameworks or SDKs
• Knowledge of device security signals and threat detection mechanisms
• Background in cybersecurity or working with security teams
• Experience in enterprise-scale environments

• Develop and maintain cross-platform modules using Kotlin Multiplatform Mobile (KMM)
• Design and implement secure authentication and authorization flows (OAuth 2.0, OpenID Connect, MFA, SSO)
• Integrate with identity providers and enforce Zero Trust principles (least privilege, continuous verification)
• Collaborate with security architects to embed security best practices into mobile client design
• Ensure secure storage of credentials and tokens using platform-specific secure storage mechanisms
• Monitor and respond to runtime security signals (e.g., device integrity, jailbreak/root detection)
• Write clean, maintainable, and testable Kotlin code for both shared and platform-specific modules