Front-end Software Engineering Internship (Onsite Tokyo, Japan)

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://www.cake.me/companies/hennge/jobs/front-end-engineering-internship

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.

Program Structure

• Weeks 1-4: Application Development Project
• Week 5: DevOps Project

Internship Details

• On-site program at HENNGE’s Shibuya office (Mon–Fri, 10:00–19:00 JST)
• Mentorship and technical discussions with engineers based in the same office
• English is the primary language used throughout the program

This program is not remote. Participants are expected to attend on-site.

Benefits 

• Round-trip airfares from and back to your country of residence
• Pre-arrival support and visa guidance
• Medical insurance* and a phone with mobile data will be provided during your internship in Tokyo, Japan**
• Up to 150,000 JPY of monthly subsidy to cover accommodation, meals, transportation, and networking activities
• Subsidized company events on top of monthly subsidy (Monthly Technical Sessions, Board Game Night, Get-to-know-you Lunches, and many others!) to get to know teams across divisions
• Access to online learning platform during the internship period

* Medical insurance will only be provided to interns who do not reside in Japan
** This internship is an unpaid training program with a subsidy provided to all interns

Internship schedule (as of Feb 20, 2026)

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

We open batches multiple times a year. For available batch information, please visit:

https://speakerdeck.com/hennge/global-internship-program-available-internship-schedule

Essential qualifications

• Third-year undergraduate or higher (including Master's and Doctoral students). Recent graduates are also welcome to apply
• Pursuing or holding a degree in Computer Science or a related field. If not, equivalent experience from a tech internship or bootcamp is expected
• Fluency in English (Japanese not required)
• Proficiency in front-endfrontend frameworks such as React or Vue in Typescript, preferably with knowledge of the nuances of building at scale such as form validation, data fetching and state management
• Knowledge of Linux / MacOS / Unix-like environments
• Interested in open source or tech community activities
• Interested in pursuing a career in Japan

At least meet three of the following:

• Experience in cloud computing platforms, especially AWS
• Experience in full stack web application development
• Proficiency in Python or Go
• Knowledge of distributed systems
• Knowledge of DevOps tools and practices (CI/CD, Infrastructure as Code)
• Experience in software testing methodologies (unit testing, integration testing, end-to-end testing)
• Experience with UI/UX design tools, especially Figma
• Experience implementing responsive web design in a web app
• Experience implementing SSO in a web app

More details about the technology stack for this internship program:
https://stackshare.io/hennge/hennge-global-internship-program

Our Ideal Candidate

Our ideal candidate is more than just a front-end developer – they’re a curious builder with a broad technical perspective. We're especially excited about applicants who:

• Have experience in back-end or full stack development
• Are familiar with DevOps practices and tools like CI/CD pipelines or cloud services
• Understand the value of thoughtful UI/UX design
• Bring a well-rounded approach to building complete, user-focused products

Bring your range – we want to see the full picture of what you can do.

How to apply

1. Register through the apply button below and verify your email address.
2. Solve the coding challenge and submit your work with your CV and cover letter.
3. 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.