Senior Software Engineer (Backend/Infrastructure) - HENNGE Secure Transfer
- Compensation
- ¥8.5M–¥12.5M / yr
- Location
- Tokyo
- Work setup
- Hybrid
- Seniority
- Senior
- Employment
- Full time
- Experience
- 3+ years
- Category
- Backend
- Posted
Skills
Must have
- 3+ years of experience developing production-scale web applications using Python.
- Strong experience across the software development lifecycle (SDLC), from system design to deployment and maintenance.
- Hands-on experience with containerization and orchestration technologies (e.g., Kubernetes, ArgoCD).
- Experience with Infrastructure-as-Code tools, such as Terraform.
- Deep expertise in architecting and operating mission-critical AWS environments
- Experience with CI/CD pipelines, automated testing, and clean-code practices.
- Ability to lead technical initiatives, mentor junior engineers, and work collaboratively in a team environment.
- Fluency in English (Japanese is not required), equivalent to CEFR B2 level or above (e.g., TOEIC 785+).
- Interest in open source or tech community activities.
Full description
Applications: candidates may apply from outside Japan. Visa sponsorship: available. Japanese: Not required. English: Business level. Japan Dev tags: Engineering, Backend, Python, Kubernetes, AWS, DynamoDB.
About HENNGE
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.
Role overview
We are looking for a Senior Software Engineer to take ownership of backend and web-platform development for HENNGE One, our flagship cloud-security suite serving over 2.8 million users globally. As a B2B SaaS leader in Japan, we provide mission-critical security solutions that empower enterprises to work safely from anywhere.
In this role, you will join the Secure Transfer Team, responsible for the development of HENNGE One Data Loss Prevention (DLP) Edition. You will be developing our high-security file exchange solution—the "Secure Vault" of our ecosystem. Your mission is to architect the fault-tolerant, high-availability systems required to handle and protect sensitive enterprise data. This position is ideal for engineers who want to bridge the gap between advanced backend development and deep cloud infrastructure, utilizing tools like Kubernetes and Terraform to ensure data integrity.
While this role primarily focuses on the DLP Edition, we value engineers who are flexible and open to new challenges, with opportunities to move between teams and products through two-way discussions that support your growth and the company’s goals.
Tech Stack:
HENNGE Secure Transfer Team: FastAPI, Kubernetes, ArgoCD, PostgreSQL, AWS
What you’ll do
- 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 closely 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.