Tokyo, JP

Senior Software Engineer (Python)


HENNGE is a leading cloud-based security provider in Japan. We deliver an additional security layer to companies which move their operations to the cloud. Our service HENNGE One has over 70% of market share in Microsoft 365/Google Workspace targeted cloud security service in Japan. We are growing fast and are a listed company on the Tokyo Stock Exchange.

As part of the engineering team, you will be responsible for building cloud-security solutions used by thousands of enterprise companies. Our flagship product, HENNGE One, provides functionalities ranging from access control, email filtering, online storage, and email archiving. We focus on implementing state-of-the-art security functionalities, ensuring SLA 99.9% in distributed fault-tolerant deployment, and providing the best user experience to our customers.

We’re currently looking for a senior Python engineer to join our fast-paced growing team.


  • Design, develop, and maintain innovative features based on business needs
  • Design scalable and fault-tolerant architecture in a distributed cloud deployment
  • Ensure high quality deliverables by maintaining CI/CD, writing solid tests, and concise documentation
  • Improve team synergy and mentor junior engineers
  • Communicate with Design, Product Management and Customer Success teams
  • Our tech stack: Python 3, asyncio, NoSQL, AWS, Docker.


Minimum Qualifications

  • 3 years of experience with Python backend development
  • Strong background building scalable web applications in Python
  • Ability to mentor junior engineers and work collaboratively in a team environment
  • Experience with cloud infrastructure, such as AWS, GCP, or Azure
  • Ability to automate deployments via CI/CD pipelines
  • Understand the importance of clean code and software documentation
  • Business level English (Japanese is NOT required)
  • Last but not least, fit with open source and hacker culture

Nice to have

  • Experience building large-scale distributed systems
  • Deep experience with AWS
  • Experience with asyncio based web frameworks in Python
  • Knowledge of security concepts and technologies
  • Deep knowledge of Linux environment
  • Degree in Computer Science or other related technical field
  • Team leadership experience


  • Flexible working hours
  • Work from home available
  • Insurance: Health, Employment, Industrial Injury, Welfare pension
  • Employee Stock Ownership Plan
  • Supporting Sexual Orientation and Gender Identity
  • Opportunities to attend international and domestic conferences
  • Financial support for technical certifications and technical learning programs

?Reasons why you will enjoy working at HENNGE?

  1. HENNGE offers a diverse development team with people from over 10 different countries who love both technology and Japanese culture. Located in the heart of metropolitan Tokyo, HENNGE offers a non-traditional Japanese experience working in Shibuya, one of the busiest and most exciting places in the world.
  2. Work-life balance is highly valued at HENNGE, and lots of fun happens at our office! Weekly board game nights, seasonal in-house events, monthly technical sessions, attendance of international tech conferences, new business contests, and many more.
  3. Having a CEO as CTO, we are driven to continuously explore and develop the latest technologies.

Learn more about our company culture here: [https://medium.com/henngeblog].

?Selection Process?

  1. Solve our coding challenge
  2. Upload your CV and Cover Letter
  3. Casual interview with our HR
  4. 2 (or 3) interviews with our engineers
  5. Interview with our CEO

Have more questions? FAQ


In a world of change, one thing has stayed constant since our founding in 1996 - HENNGE harnesses the power of transformative technology to make it accessible and secure for all. It’s a simple story, but one that drives us forward even to this day. Who are we? HENNGE is a B2B company based in Tokyo, Japan, and we are at the forefront of the changing workplace. Everyday HENNGE One, the number one cloud security service in Japan, enables customers to adopt flexible work environments and safely harness the power of the cloud from any location. With cloud security ensured, employees are free to focus on working smarter, improving quality and achieving business results. What is our vision? Our industry is forever evolving, and it’s HENNGE’s mission to allow our customers to effortlessly keep current with the latest technologies. By delivering solutions that provide customers with access to cutting-edge software and tech products, we enable them to do more and reach higher than ever before. Together with our customers, we strive to inspire change in the world through the liberation of technology. Tech teams at HENNGE Engineers at HENNGE love to explore new technologies. Working in tight-knit, autonomous teams, we enjoy bringing our hallmark - liberation of technology - to clients. Use of agile methodologies enables each of us to take an active part in directing the future of our products. UX, architecture, development and deployment - all aspects benefit from the HENNGE work style.