Front-end Engineering Internship (Onsite Tokyo, Japan)

Tokyo
No Remote
Internship
February 20, 2026

HENNGE’s Global Internship Program (GIP) is an on-site software engineering training program designed and run by HENNGE, a cloud security company based in Tokyo. The program is created for students and early-career engineers who want to strengthen their front-end engineering skills in a global, English-speaking environment at HENNGE’s Shibuya office.

This Front-End Pathway focuses on hands-on application development training using TypeScript and modern front-end frameworks (such as React or Vue), with mentorship from HENNGE’s experienced engineers. The program emphasizes self-learning, explanation, and collaboration rather than production work.

Japanese is not required.

If you are interested in HENNGE’s GIP: Full-Stack Engineering Pathway instead, please check it out here: https://japan-dev.com/jobs/hennge/hennge-global-internship-program-onsite-tokyo-japan-42q8i0

What You’ll Learn & Practice

During the program, you will:

Develop front-end applications as part of structured training projects using TypeScript with React or Vue
Practice key front-end engineering concepts, including:

Form validation
Data fetching
State management

Learn, at a practical level, how front-end applications interact with back-end services and cloud infrastructure
Explain your technical decisions, trade-offs, and problem-solving approach during discussions and reviews
Receive feedback from mentors and improve your implementation iteratively

Our Stance on AI and Software Engineering

AI tools can be helpful, but the goal of HENNGE’s Global Internship Program (GIP) is to help you build strong software engineering fundamentals.

To support that learning, we ask you not to use AI tools to generate code for training assignments or solution implementations. The code you submit should be written by you and reflect your own understanding.

You may use a designated AI service to support your learning in non-code-generating ways, such as clarifying technical concepts, understanding documentation, or helping with non-essential tasks (for example, command-line options).

Throughout the program, you’ll be expected to take ownership of your code and clearly explain your thinking, trade-offs, and design decisions. In this learning environment, you are the engineer and the final gatekeeper of quality.

Internship schedule

We open batches multiple times a year.

Available batch (as of Feb 20)

Batch 5 (2026): Nov 16 - Dec 18 (5 weeks)

How to apply

Register through the apply button below and verify your email address.
Solve the coding challenge and submit your work with your CV and cover letter.
An HR interview followed by an online interview, will be given to those who pass Step 2.

Before you apply: Your CV and cover letter are your chance to show us your story. Clear, thoughtful explanations of your experiences will make your application stronger, while generic submissions may not fully reflect your potential.

We suggest reviewing this guide to help you present your best self: https://hennge.com/global/info/henka/interview/202403-crafting-the-perfect-cover-letter/

Notice for Applicants

A limited number of internship slots are available. Applications will be reviewed as they are received, and positions will be filled on a first-come, first-served basis. We encourage you to apply early, as applications will close once all positions are filled.
The coding challenge has no time limit, and the screening process will not consider solving time. Please note that the application is completed after uploading application documents and filling in the batch preferences.
Please take another challenge if you are (also) interested in applying for HENNGE’s GIP: Full Stack Engineering Pathway. Please use different emails to sign up if you apply for both internships.

APPLY NOW ➜

About HENNGE

HENNGEは、「テクノロジーの解放で世の中を変えていく。」という理念のもとに、創業以来「ITコンシューマライゼーション」を意識したプロダクトを提供し続けています。

主には、クラウドサービスのセキュリティレベルを引き上げる「HENNGE One」などの自社サービスやITコンサルティングサービスを提供しています。

HENNGE One はMicrosoft 365、Google Workspace、Box、LINE WORKSなど複数のクラウドサービスへのセキュアなアクセスとシングルサインオンを実現するSaaS認証基盤です。IP制限、デバイス証明書、セキュアブラウザ、パスワードレス認証、多要素認証（MFA）など豊富な認証機能で利便性と安全性のバランスのとれたセキュリティサービスを提供します。

多要素認証を提供し、さらにコンシューマー市場で利用が拡がるクライアントベースの生体認証と連携することにより、脱パスワードの世界を作り出します。

社内公用語は英語、10国籍以上のメンバーが所属する超多国籍チームです。日本語&英語レッスンのサポートあるので、今は話せなくてもこれから日本語に挑戦したい外国人、グローバルな環境で英語力を磨いて成長したい日本人エンジニアに最適な環境です。

Salary
They offer performance based semi annual bonus, and special bonus for out-of-the-job remarkable contributions.
Japanese Language Policy
Japanese skills are a prerequisite for positions that require communication with Japanese speaking clients or third-parties. It might not be a requirement for software engineers, but it could be in other positions.
Visa Sponsorship
Do you sponsor a work visa for foreign employees?

Yes, we do, as long as you meet the requirements of the Japanese government (but this is the case at every company). This usually means that you will need a bachelor's degree or 10 years of demonstrated work experience in your field.
Paid Leave
- Yearly standard paid time off
- Short-term family care leave (5 days per year that can be used to take care of friends and family)
- Summer vacation (4 days)
- Congratulation or condolence leave (marriage, childbirth, or immediate family’s death)
Benefits
👩‍🎓 Language learning support

👨‍🏫 Advanced language expert allowance(English and Japanese)

💹 Employee stock option plan

🥤 Free Dr.Pepper program

🍔 Communication lunch program

💜 Social security/insurance benefits included

⚾️ Office clubs to join: coffee club, board game club, karaoke club, language cafe club, etc

🚃 Full commuting coverage (maximum of 180,000yen in 6 months)
Engineer Interview Process
Engineering Jobs

(1) Online coding test

(2) Online interview with the team for 3-4 rounds

(3) For new graduates: Participate in a mandatory internship program at our Tokyo office from 2-3 days up to 6-8 weeks (internship cost will be covered) For experienced engineers, you may be asked to participate in a 2-3 days/ 2 weeks trial period

(4) Interview with our board members

For more questions, please check our FAQ page for the screening process.
Remote Work
HENNGE fosters a hybrid work environment with emphasis on in-office collaboration and the encouragement for employees to work onsite.
Work style
- Standard working hours: 10:00-19:00
- Flex time: (Core time 11:00-16:00, 1 hour lunch break)
- Shortening of work hours is available for employees taking care of a child or children of a certain age.
Tech Stack
We use a large variety of technologies at HENNGE and always encourage the use of the right tool for the job. We strive to always use the latest and most up-to-date technologies. Our back-ends are primarily written in Python or Go while our front-ends usually use Vue or React. We heavily use CI/CD tools to streamline our workflows. We use microservice architectures utilizing both containerization and serverless design. Our systems are mainly deployed on AWS with the use of GCP as well. We use a huge range of services provided by these platforms to support our applications.
Diversity
We embrace diversity and we make sure that everyone is provided opportunities to do their best work.

We celebrate events like Tanabata, Hinamatsuri and Setsubun to introduce Japanese culture to our international employees.

Also, we provide a prayer/meditation room for our Muslim employees.

For company gatherings with food, such as our communication lunches we have twice a month, Halal options are always available so we can accommodate all of our employees.
Parents and Family
HENNGE allows shorter work hours for employees taking care of a child or children of a certain age. We also have a paid leave system, called short-term family care leave, which employees can use to take care of their family and friends when they are in need. We also have a family day where employees can bring their family to the company and spend time together.