Senior Mobile Application Developer

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SecureAuth is on a mission to eliminate passwords and revolutionize how people authenticate. We are looking for a Senior Mobile Application Developer to lead the implementation of advanced authentication flows - especially passkeys (WebAuthn/FIDO2) - in our cross-platform mobile app, SecureAuth Authenticate. In this role, you will build seamless, secure login experiences that leverage the latest passwordless technologies on both iOS and Android. If you are passionate about cutting-edge mobile development and creating user-friendly security solutions, this is an opportunity to make a significant impact on next-generation identity management.

Key Responsibilities:

• Develop & Maintain Mobile Apps: Build, enhance, and maintain native iOS and Android codebases for SecureAuth's mobile authentication app, ensuring high performance, security, and reliability
• Implement Passkey Support: Integrate passkey authentication (WebAuthn/FIDO2) into the app by developing platform-specific components - including an iOS Credential Provider Extension and an Android CredentialProviderService - to interface with each OS's passwordless authentication framework
• Hardware-Key Integration: Work extensively with hardware-backed key storage (Apple Secure Enclave and Android StrongBox/Keystore). Implement generation and secure storage of cryptographic keys, and use biometric prompts (Face ID, Touch ID, Android Biometric Authentication) to unlock credentials when needed
• Cryptographic Workflows: Design and code robust cryptographic key management and signing flows. Ensure secure registration, authentication, and key synchronization via SecureAuth's cloud APIs so that users' passkeys and credentials seamlessly sync across devices
• Enhance Auth Flows: Extend existing authentication methods (such as QR code enrollment and push notification login) to incorporate passkey-based login. For example, enable users to scan a QR code and confirm login using a passkey, or approve a push notification with a biometric-unlocked passkey instead of a password
• Code Quality & Testing: Write clean, testable, and well-documented code. Establish unit tests and work with QA to automate testing of security features. Perform code reviews to uphold best practices for secure coding and maintainability in an enterprise mobile app
• Collaboration: Work closely with cross-functional teams - including UX/UI designers, product managers, and backend cloud engineers - to plan new features and ensure the mobile app integrates smoothly with SecureAuth's platform. Participate in agile ceremonies, provide technical guidance on mobile best practices, and coordinate simultaneous feature releases on iOS and Android for parity
• Stay Current: Keep up-to-date with the latest mobile OS capabilities, security standards, and authentication technologies. Proactively recommend and implement improvements so that SecureAuth Authenticate remains at the forefront of user-friendly security (e.g. new iOS/Android biometric APIs, emerging FIDO2 standards, etc.)

Required Qualifications:

• Experience: 5-8+ years of professional mobile application development, with a strong track record of building and shipping native iOS and Android apps (enterprise or consumer, at scale)
• iOS Expertise: Deep knowledge of iOS development, including Objective-C++ and Objective-C (for low-level or legacy integrations), as well as Swift and SwiftUI for modern UI development. Comfortable working with iOS frameworks and extensions (e.g. implementing an AutoFill Credential Provider Extension for passkeys on iOS)
• Android Expertise: Strong proficiency in Android development using Kotlin. Experience with modern Android libraries and patterns such as Jetpack Compose for UI and AndroidX libraries. Ability to build Android services and components (e.g. an Android CredentialProviderService for the Android 14+ Credential Manager API) and handle different Android OS versions
• Authentication & Security: Hands-on experience with device security features - including using the Secure Enclave on iOS and Android Keystore/StrongBox - for key generation and storage. Familiarity with biometric authentication flows (fingerprint, face recognition prompts) and ensuring sensitive data is handled securely
• WebAuthn/FIDO2 Knowledge: Working understanding of WebAuthn, FIDO2, or similar cryptographic authentication protocols. You know how public/private key authentication works and have implemented or used cryptographic signing workflows (even if not in production, you grasp the concepts deeply)
• Quality & Best Practices: Ability to write high-quality, secure, and maintainable code. Experience implementing thorough testing (unit and integration tests) for mobile apps. Familiarity with secure coding guidelines and tools to detect and remediate vulnerabilities in mobile applications
• CI/CD & Deployment: Comfortable with mobile CI/CD pipelines and app distribution processes. For example, configuring automated builds, tests, and deployments to the App Store and Google Play. Knowledge of managing provisioning profiles, certificates, signing, and Play Console release tracks
• API Integration: Solid understanding of RESTful API integration and network security in mobile apps. While this role is mobile-focused, you should be adept at working with backend services (authentication APIs, cloud sync endpoints) and handling data serialization, encryption, and synchronization with cloud systems
• Team Collaboration: Excellent communication and teamwork skills. Proven ability to work closely with designers, product managers, and backend engineers to shape feature requirements and deliver end-to-end functionality. Comfortable in an agile development environment, giving and receiving feedback on code and design
• Domain Experience (Bonus): Background in security, identity, or authentication domains is a plus. For example, experience building multi-factor authentication (MFA) apps, identity verification tools, or zero-trust security products will help you hit the ground running

Preferred Qualifications:

• Cross-Platform Planning: Experience coordinating feature parity between iOS and Android platforms. You understand how to design solutions that play to each platform's strengths while delivering a consistent user experience across both
• Advanced Authentication Tech: Prior experience developing products related to MFA, SSO, identity verification, or zero-trust security. Familiarity with concepts like one-time passcodes, push-based authentication, QR code login, NFC/Bluetooth-based access, or other innovative authentication methods
• Open Standards & Protocols: Active interest or involvement in the authentication community (FIDO Alliance, W3C WebAuthn working group, etc.) is a plus. Keeping abreast of emerging standards and possibly contributing to open-source libraries or standards in the identity security space
• Performance Optimization: Knowledge of optimizing cryptographic operations and biometric interactions on mobile devices for a smooth user experience. Experience diagnosing and improving app performance, battery usage, and security-related performance (e.g. encryption overhead)
• Education: A Bachelor's or Master's degree in Computer Science, Engineering, or a related field is preferred (or equivalent real-world experience)

Reporting Structure and Work Environment

This position is a full-time role on our Mobile Engineering team. You will report to the Director of Mobile Engineering (SecureAuth Authenticate) and work alongside other senior mobile developers and QA engineers. We foster a highly collaborative environment despite being remote-first - our team communicates daily via agile stand-ups, and we make heavy use of collaboration tools to stay in sync. Location is flexible: SecureAuth embraces a remote work culture, but we do prefer candidates EST or CET timezones. If you are near one of our offices (for example, our headquarters in Irvine, CA or Buenos Aires, Argentina), you have the option to work hybrid or on-site, but this is not required.

Benefits & Perks

SecureAuth offers a competitive compensation package and an array of benefits aimed at supporting your well-being and growth:

• Remote-First & Flexible Hours: We trust our employees to get work done on a schedule that fits your life. Work from home with flexible hours and a healthy work-life balance
• Comprehensive Healthcare: Full medical care, OSDE 310, for you and your dependents
• Paid Time Off: Generous PTO, plus paid holidays, so you can recharge and take time for what matters most
• Wellness & Support: Employee Assistance Program and wellness initiatives to support your mental and physical health. We offer resources for work-life balance and personal development
• Professional Growth: Opportunities for continuous learning, conference attendance, and career advancement. You'll be working on cutting-edge technology with a team that encourages innovation and mentorship
• Team Culture: Join a passionate global team with regular virtual activities, occasional meet-ups, and an inclusive culture that celebrates wins and values everyone's contribution. We also have an employee referral bonus program - we believe great people know great people!

Are you excited about building the future of secure, passwordless authentication on mobile devices? If you have the skills and drive to lead innovative mobile development in the security space, we'd love to hear from you. Join SecureAuth and help us create a simpler, safer digital world for millions of users.

How to Submit an Application:

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