Tokyo, Japan
HENNGE
Advanced relocation package
Flight ticket
Language courses
Visa services
About
HENNGE
HENNGE is a leading cloud-based security provider in Japan, delivering an additional security layer to companies which move their operations to the cloud.
HENNGE One has over 70% market share for cloud security services targeting Microsoft 365/Google Workspace 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.
PositionWe're currently looking for a Senior Front-end Engineer (React) to join our fast-paced growing team.
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.
ResponsibilitiesDesign, develop, and maintain innovative features based on business needs
Bring our design system to life by implementing high-fidelity UI using a modern frontend framework
Ensure high-quality deliverables through CI/CD pipelines, tests, and documentation
Collaborate with Design, Product Management and Customer Success teams to continuously improve the product
Support the team by actively participating in discussions and reviewing others' code
Improve team synergy and mentor junior engineers
Our Tech Stack
React
Each product team is free to choose their own tech stack.
Each project uses Typescript as the base language, with a combination of these technologies:
Styled Components
Redux (Toolkit)
RxJS
Jest/Testing Library
Testcafe
For more information, you can also check our Stackshare page out.
Your qualification
Minimum Qualifications
3+ years of web development experience, with at least 3+ years in React
Ability to write proper type-safe code with Typescript
Ability to mentor junior engineers and work collaboratively in a team environment
Ability to write robust tests along with your code
Understand the importance of clean code and software documentation
Business-level English (Japanese is NOT required)
Interested in open source/tech community activities
Meet At Least Three Of The Following Criteria
Degree in Computer Science or other related technical fields
Experience with state management in a complex web app (e.g. Redux, Vuex)
Familiarity with design collaboration tools like Figma
Knowledge setting up build and test environments, CI/CD pipelines
Knowledge of Unix-like environment
Team leadership experience
Experience with Function Components and Hooks
What we offer
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.
(*Applicable from October 2025 onwards) Details will be provided at the offer meeting.Insurance:
Health, Employment, Industrial Injury, Welfare pension
Transportation allowance (maximum of JPY 35,000 per month)
Employee Stock Ownership Plan
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.
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.
Passion for Technology Our CEO, also serving as CTO, actively leads product development, fostering an environment of innovation and support.
Having a leader who truly understands and is still involved in the tech side of the business makes for an exciting and supportive environment for engineers.
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.
Additional details
Working Conditions
Employment Type
Permanent Employee
Place of Work
Japan, Tokyo, Shibuya HQ
Hybrid work environment with emphasis on in-office collaboration and encouragement for employees to work onsite.
Working Hours
10:00 - 19:00
Flex Time (Core time is 11:00 - 16:00) with 1 hour break.
Remuneration
We generally offer a salary range of JPY 8.5M to 12.5M (English Allowance & Physical Communication Bonus inclusive - please check the details below), with the final amount determined based on your experience and skills.
To learn more about life at
HENNGE, please check these two links:
Life at
HENNGE
Stories from our employees
Selection Process
Solve our coding challenge by clicking the button below.
You will receive an email with our guidance upon your submission, and there is no time limit to finish the challenge.
Once you finish the coding challenge, follow the instructions to upload your CV and Cover Letter.Casual interview with our HR
2 (or 3) interviews with our engineers
Interview with our CEO
Engineer Developer Frontend React Web Front-end TypeScript Front end Redux Unix Figma Vuex
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