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About the Role
As a Mobile (iOS) Engineer on the HENNGE Access Control team, you will own the iOS applications (including HENNGE Secure Browser and HENNGE Lock) powering HENNGE One, Japan’s No. 1 IDaaS platform serving 2.8+ million users. You will drive the complete feature development lifecycle, autonomously managing technical design, task breakdown, and delivery. To ensure seamless integration, you will collaborate directly with backend, product, and infrastructure teams. Additionally, you will spearhead the modernization of our mobile architecture by implementing new features, ensuring security compliance, and systematically phasing out legacy dependencies as our platform scales.
Responsibilities
- Own the development of our secure mobile browser, which allows administrators to apply feature restrictions based on dynamic rules and authentication via OIDC.
- Maintain and improve our secure push OTP application.
- Design fault-tolerant applications that interface smoothly with our cloud environment.
- Build and maintain robust mobile CI/CD pipelines to automate testing, deployment, monitoring, and documentation.
- Partner with Product, Design, and Customer Success teams to scope requirements, estimate timelines, and deliver premium enterprise experiences.
- Architect seamless codebase migrations (such as CocoaPods to Swift Package Manager) to ensure uninterrupted user experiences.
- Drive technical excellence through active participation in code reviews, architectural design, and technical decision-making across the mobile applications.
Requirements
- 3+ years of professional experience developing production-scale mobile applications using SwiftUI.
- Ability to lead technical initiatives, mentor junior engineers, and work collaboratively in a team environment.
- Hands-on experience with mobile development tooling (Xcode, App Store Connect) and client-server communication concepts.
- Experience with CI/CD, automated testing, code documentation, and clean-code practices.
- Fluency in English (Japanese is not required), equivalent to CEFR B2 level or above (e.g., TOEIC 785+); an interest in working within a multicultural environment is essential.
- Degree in Computer Science or a related technical field.
- Professional experience building large-scale enterprise or SaaS iOS applications in the B2B space.
- Experience managing App Store Connect, TestFlight deployments, and the app release lifecycle.
- Familiarity with mobile CI/CD workflows (e.g., Fastlane, CircleCI).
- Knowledge of mobile web views (WKWebView), native-to-JavaScript bridging, and web technologies.
- Strong end-to-end to debugging skills, with experience utilizing observability tools to investigate logs in related systems.
- Solid understanding of web security fundamentals and identity/ access management (OIDC/MFA).
- Ability to read and review Android code and ensure cross-platform feature alignment.
- Interest in contributing to open-source projects or participating in the tech community.
Skills
- SwiftUI
- Swift 6
- JavaScript
- WKWebView
- Xcode
- App Store Connect
- REST Services
- AWS
- CI/CD
- Automated testing
- Code documentation
- Clean-code practices
- Fastlane
- CircleCI
- OIDC
- MFA
Location
- Tokyo, Japan
Work Type
- Permanent employee
- Flexible working hours
Experience Level
- 3+ years of professional experience
Education Level
- Degree in Computer Science or a related technical field
Salary/Compensations
- 8 million to 10.5 million JPY
Benefits
- English Allowance and Advanced Language Expert Allowance
- Physical Communication Bonus
- Transportation allowance
- Employee Stock Ownership Plan
- Health Insurance
- Employment Insurance
- Industrial Injury Insurance
- Welfare pension
- Opportunities to attend international and domestic conferences
- Financial support for technical certifications and technical learning programs
- Flight tickets for relocation
- Visa sponsorship
- Japanese lessons
About the Company
- HENNGE is a Tokyo-based cloud-security leader helping organizations adopt flexible work environments and safely leverage the cloud.
- As a B2B SaaS company, we build secure and reliable cloud solutions that help enterprises manage access and identity efficiently.
- Our flagship product, HENNGE One, empowers thousands of enterprise customers with access control, email filtering, archiving, and next-gen cloud security features.
- We have a highly technical CEO, a strong engineering culture, and a global mindset.
- Join a vibrant team from over 20 countries, united by a love for technology and Japanese culture.
- Located in Shibuya, Tokyo, we offer a dynamic, non-traditional work environment in one of the world's most exciting cities.
- Work-life balance is highly valued at HENNGE.
- Our CEO has an engineering background and remains deeply engaged in product development.
- Work in autonomous teams where your decisions shape our services.
- Influence every aspect of our products, from UX and architecture to development and deployment, in an agile and collaborative setting.
Equal Opportunity
- We Celebrate Diversity