Haken Mobile SDK Engineer - iOS Platform & Identity
Posted 1 week ago by Morgan McKinley
Negotiable
Undetermined
Hybrid
Tokyo, Japan
Summary: The Haken Mobile SDK Engineer role is centered on designing and maintaining a high-performance mobile identity SDK, primarily for iOS, within a globally scaled technology platform. The position emphasizes building secure, reusable SDK components for external developers and mission-critical digital services. It offers significant technical autonomy and the opportunity to impact widely used mobile products. The role requires collaboration with various teams to ensure optimal performance and compliance with standards.
Key Responsibilities:
- Design, develop, and maintain an iOS-focused mobile SDK, with supplemental Android support.
- Build secure, reusable, and high-performance SDK components for external integration.
- Collaborate with backend, security, and product teams on SDK interfaces and architecture.
- Optimize performance, memory usage, and stability across devices and OS versions.
- Ensure compliance with app store policies, privacy standards, and security requirements.
Key Skills:
- 5+ years of hands-on mobile application development experience.
- Strong expertise in iOS development using Swift and/or Objective-C.
- Proven experience building SDKs, frameworks, or system-level libraries.
- Strong problem-solving ability with high technical ownership.
- Clear communicator in cross-functional and multicultural environments.
- Comfortable collaborating in Japanese, English, or Chinese teams.
- Japanese: Conversational level.
- English: Conversational level.
- Android development experience using Kotlin and/or Java.
- Knowledge of mobile security, identity verification, or cryptography.
- Experience supporting third-party developers and SDK integrations.
Salary (Rate): £22.50 hourly
City: Tokyo
Country: Japan
Working Arrangements: hybrid
IR35 Status: undetermined
Seniority Level: undetermined
Industry: IT
This Haken Mobile SDK Engineer role focuses on designing and maintaining a high-performance mobile identity SDK, with a strong emphasis on iOS system-level engineering. Working within a globally scaled technology platform, you will build secure, reusable SDK components used by external developers and embedded deeply into mission-critical digital services. This position offers high technical autonomy and long-term impact on widely used mobile products.
Key Responsibilities
- Design, develop, and maintain an iOS-focused mobile SDK, with supplemental Android support.
- Build secure, reusable, and high-performance SDK components for external integration.
- Collaborate with backend, security, and product teams on SDK interfaces and architecture.
- Optimize performance, memory usage, and stability across devices and OS versions.
- Ensure compliance with app store policies, privacy standards, and security requirements.
Required Skills and Qualifications Experience:
- 5+ years of hands-on mobile application development experience.
- Strong expertise in iOS development using Swift and/or Objective-C.
- Proven experience building SDKs, frameworks, or system-level libraries.
Soft Skills:
- Strong problem-solving ability with high technical ownership.
- Clear communicator in cross-functional and multicultural environments.
- Comfortable collaborating in Japanese, English, or Chinese teams.
Language Requirements:
- Japanese: Conversational level.
- English: Conversational level.
Preferred Skills & Qualifications
- Android development experience using Kotlin and/or Java.
- Knowledge of mobile security, identity verification, or cryptography.
- Experience supporting third-party developers and SDK integrations.
About the Company
Our client builds foundational technology platforms that support a vast global digital ecosystem. Engineers work on mission-critical identity and security services, collaborating with highly skilled international teams. The organization values deep technical expertise, real-world impact, and long-term platform thinking.
Why You'll Love Working Here
- Hybrid working model offering flexibility and work-life balance.
- Casual dress environment with access to an employee food hall.
- Monthly transportation allowance up to ¥20,000.
- Full health, labor, and employment insurance coverage.
- Opportunity to build technology embedded in globally used products.
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