Mobile (iOS) engineer - HEN

Join us at HENNGE, 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. What makes us unique: a highly technical CEO, strong engineering culture, and a global mindset. For further details regarding the engineering teams, products, and more, please visit this link: https://speakerdeck.com/hennge/company-introduction-deck-hennge

Role overview

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.

Tech Stack:

Swift w/ SwiftUI & Swift 6, JavaScript, WKWebView, Xcode, App Store Connect, REST Services AWS

What you’ll do

• 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.

What we’re looking for

Minimum Qualifications:

• 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.

While not required, we’d love to hear if you have:

• 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.

Work Style & Employment Details

Work StyleFlexible working hours with a designated core time (11:00–16:00), allowing you to organize your day effectively. Employees typically work 8 hours per day with a 1-hour break.

Employment TypePermanent employee.

Place of WorkTokyo, Japan — Shibuya Headquarters.

Compensation

Annual salary: 8 million to 10.5 million JPY(includes English Allowance and Physical Communication Bonus)

Please refer to our Company Introduction Deck for an explanation of our Assessment System and the Belt System, which we use to determine the candidate's salary range: https://speakerdeck.com/hennge/company-introduction-deck-hennge

Benefits

• English Allowance and Advanced Language Expert Allowance: JPY 10,000 ~ JPY 130,000 per month, paid alongside base salary, if the employee fulfills the requirements.

• Physical Communication Bonus: JPY 4,000 per day for coming to the office and interacting with other employees, paid out as bonus according to the number of days. Details will be provided at the offer meeting.

• Transportation allowance (maximum of JPY 35,000 per month).

• Employee Stock Ownership Plan.

• Insurance: Health, Employment, Industrial Injury, Welfare pension.

• Opportunities to attend international and domestic conferences.

• Financial support for technical certifications and technical learning programs.

【Reasons why you will enjoy working at HENNGE】

• ? We Celebrate Diversity

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.

• ? Smooth Japan Relocation

We make your move to Japan smooth and stress-free. We provide comprehensive support such as flight tickets, visa sponsorship, and Japanese lessons, to ensure a smooth onboarding process for our new hires, ensuring a seamless transition and a warm welcome for all candidates.

• ? Balanced Work Life

Work-life balance is highly valued at HENNGE, and lots of fun happens at our office! 200+ of social channels in our Slack, from weekly board game nights to snowboarding club, internal and seasonal events, monthly tech sessions with beer bashes, attendance of international tech conferences, and more. Employees have access to a flexible working hours system (with core working hours) to accommodate their preferred working style.

• ❤ Passion for Technology

Our CEO has an engineering background and remains deeply engaged in product development. This hands-on understanding of technology helps shape a culture where thoughtful design, technical quality, and continuous improvement are genuinely valued. For engineers, this means working in an environment led by someone who understands the challenges of building products and actively supports teams in doing their best work.

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• ? Collaborative Teams

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.

Be part of a diverse and innovative team at HENNGE, where your passion for technology and desire to make a difference are valued and celebrated. Ready to change and challenge the status quo with us?

To learn more about life at HENNGE, please check these two links:

Life at HENNGE - https://hennge.com/global/info/henka/

Stories from our employees - https://medium.com/henngeblog

Selection Process

• Submit your CV (Cover Letter is optional).

• Complete a take-home iOS coding assessment.

• Casual Interview with HR

• 2 (or 3) interviews with Engineers

• Final Interview with our CEO.

Have more questions? Please consult our FAQ.