Full Stack Software Engineering Internship (Onsite Tokyo, Japan)

COMPANY OVERVIEW

Established in 1996, HENNGE is one of the first IT ventures in Japan. Controlling a majority of the nation’s market share, we are the leading cloud-based security company based in Tokyo. We aim to become a world-class IT company by expanding our business globally, having English as our official language, and hiring international talents worldwide. We are looking for highly talented and motivated engineers (front-end, back-end, DevOps, mobile development) to join our team in Tokyo!

Software Engineer Internship: Job Description

Ready for a Tech Adventure in Tokyo? Join Our Internship Program – 4-6 Weeks of Software Engineering Internship Await!

Join HENNGE’s Global Internship Program (GIP): Full Stack Software Engineering Pathway in Tokyo, Japan. This unique 4-6 week internship at our Shibuya headquarters offers you personal and professional growth in an internationally diverse environment.

In HENNGE’s GIP: Full Stack Engineering Pathway, you will acquire practical application development skills using Python, Go, and/or TypeScript. GIP will provide you with hands-on experience using state-of-the-art cloud platforms such as Amazon Web Services, offering a full-stack experience for application development.

Our primary working language is English, so no Japanese is required. Interns are expected to join the program at our Shibuya headquarters in Tokyo for 4-6 weeks, Monday to Friday, from 10 AM to 7 PM (JST). While the program is unpaid, we provide comprehensive subsidies, and outstanding participants may be offered full-time employment opportunities.

If you are interested in HENNGE’s GIP: Front-end Engineering Pathway instead, please check it out here.

Internship Details

• Build end-to-end solutions using Python, Go, and/or TypeScript.
• Explore full-stack development, cloud computing, and distributed systems.
• Internship Flow:
• Weeks 1-3: Full-Stack Training
• Week 4: DevOps Training
• Weeks 5-6 (conditional): Special Assignment - a unique project for each intern and specific to their batch.

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 

Essential Qualifications

• Third-year undergraduate or higher (including Master's and Doctoral students). Recent graduates are 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 Python or Go
• 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
• Knowledge of distributed systems
• Knowledge of DevOps tools and practices (CI/CD, Infrastructure as Code)
• Knowledge of Container technology (e.g. Docker)

More details about the technology stack for this internship program here.

Our Ideal Candidate

Our ideal full stack engineering intern is a curious problem-solver who’s excited to build real-world applications and grow in a fast-paced tech environment. We’re especially interested in candidates who:

• Are proficient in Python or Go and comfortable working in Unix-like environments
• Have a solid grasp of both front-end and back-end development
• Have an interest in cloud computing and DevOps practices
• Are passionate about learning, contributing to tech communities, and possibly pursuing a career in Japan

Bring your curiosity, versatility, and drive—we’re excited to see what you can build with us.

Internship schedule 

We open batches multiple times a year.

Available batch (as of May 16)

• Batch 1 (2026): Jan 16 - Feb 13 (20 business days)
• Batch 2 (2026): Mar 16 - Apr 17 (24 business days)

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. A phone screening, followed by an online interview, will be given to those who pass Step 2.

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 Front-end Engineering Pathway. Please use different emails to sign up if you apply for both internships.