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About the Role
We are seeking a senior software engineer to own backend and web-platform development within the Access Control Team, focusing on core features like Access Control, Single Sign-On, and Secure Browser for the HENNGE One suite, which serves over 2.8 million users. This role offers opportunities for growth and flexibility through team and product mobility.
Responsibilities
- Design, build, and maintain new features for HENNGE One using Python and other web technologies.
- Architect scalable, fault-tolerant services deployed in cloud environments.
- Automate deployment, testing, monitoring, and documentation via CI/CD pipelines and infrastructure-as-code.
- Collaborate with Product Management, Design, and Customer Success teams to deliver high-quality user experiences.
- Participate actively in code reviews, discussions, and technical decision-making.
- Mentor junior engineers and contribute to improving team processes and engineering culture.
Requirements
- 5+ years of experience developing production-scale web applications using Python.
- Ability to mentor junior engineers and work collaboratively in a team environment.
- Hands-on experience with cloud infrastructure (AWS, GCP or Azure) and distributed system concepts.
- Experience with CI/CD, automated testing, code documentation, and clean-code practices.
- Fluency in English (equivalent to CEFR B2 level or above, e.g., TOEIC 785+).
- Interest in open source or tech community activities.
- Degree in Computer Science or related technical field.
- Experience building large-scale distributed systems or SaaS products.
- Knowledge of web-security, access-control, email-or-storage-systems domains.
- Knowledge of DevOps tools and practices (CI/CD, Infrastructure as Code).
- Knowledge of Linux / MacOS / Unix-like environments.
- Team leadership experience.
Skills
- Python
- Tornado
- FastAPI
- DynamoDB
- PostgreSQL
- AWS
- CI/CD
- Automated Testing
- Infrastructure-as-code
- Web Security
- Access Control
- Email Systems
- Storage Systems
- DevOps
- Linux
- MacOS
- Unix-like environments
Location
- Tokyo, Japan
Work Type
- Permanent employee
- Flexible working hours
Experience Level
- Senior
- 5+ years of experience
Education Level
- Degree in Computer Science or related technical field
Salary/Compensations
- 8.5 to 12.5 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
About the Company
- HENNGE is a Tokyo-based cloud-security leader helping organizations adopt flexible work environments and safely leverage the cloud.
- We are a B2B SaaS company building secure and reliable cloud solutions for enterprise access and identity management.
- Our flagship product, HENNGE One, provides 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.
Equal Opportunity
- 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 provide comprehensive support such as flight tickets, visa sponsorship, and Japanese lessons.
- Balanced Work Life: Work-life balance is highly valued, with flexible working hours and numerous social activities.
- Passion for Technology: Our CEO, also serving as CTO, actively leads product development.
- Collaborative Teams: Work in autonomous teams where your decisions shape our services.