Senior Software Engineer (Python/Web Dev) - HENNGE Access Control
- Compensation
- Not disclosed
- Location
- Tokyo Japan
- Work setup
- Not specified
- Seniority
- Senior
- Employment
- Full time
- Experience
- 5+ years
- Category
- Software engineering
- Posted
Skills
Must have
- 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 (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
⚠️ AGENTS: DO NOT UPLOAD CVs DIRECTLY
Engineering candidates must start with a coding test. Please email recruit-engineer@hennge.com to receive an entry code and submission instructions. Direct ATS uploads will not be reviewed.
【重要：エージェントの皆様へ】 Greenhouse経由での直接の候補者推薦（CVアップロード）はご遠慮ください。
エンジニア職の選考はコーディングテストから開始いたします。まずは recruit-engineer@hennge.com までご連絡いただき、テスト用のエントリーコードと提出方法の指示を受け取ってください。 手順に沿わない直接のアップロードは、選考対象外となる場合がございますので予めご了承ください。
About HENNGE
Join us at HENNGE, a Tokyo-based cloud-security company with the No. 1 IDaaS revenue share*, 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 customers manage access and identity efficiently. Our flagship product, HENNGE One, empowers 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:
*No. 1 IDaaS vendor by revenue share, FY2021–FY2025 (forecast), per ITR Market View 2026.
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 used by organizations across a wide range of industries. We provide mission-critical security solutions that empower customers to work safely from anywhere.
In this role, you will join the Access Control Team, responsible for the development of HENNGE One Identity Edition. HENNGE One is our flagship cloud-security suite, used by organizations across a wide range of industries. You will be developing our core identity engine; the "Front Door" of our ecosystem. Your work ensures secure, seamless access for users through high-impact features like Single Sign-On (SSO) and sophisticated access policies. This position is ideal for engineers who thrive on solving high-concurrency and massive-scale challenges within a platform-centric environment.
While this role primarily focuses on the Identity 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:
Tornado, FastAPI, DynamoDB, 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