Role: Software Engineer Intern (Onsite; Tokyo)

Software Engineering Training Internship in Tokyo (4–5 Weeks, On-site)

HENNGE’s Global Internship Program (GIP) – Full-Stack Pathway

Tokyo (Shibuya) | 4–5 weeks | English-first environment

About the Program

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 full-stack engineering skills in a global, English-speaking environment at HENNGE’s Shibuya office.

This Full-Stack Pathway focuses on hands-on application development training across back-end, front-end, and basic DevOps, using Python (non-ML stack), Go, or TypeScript on the back-end and TypeScript with modern front-end frameworks on the front-end. The program emphasizes fundamental engineering skills, problem-solving, explanation, and collaboration, rather than production work.

Japanese is not required.

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

https://recruit.hennge.com/en/gip

What You’ll Learn & Practice

During the program, you will:

• Develop full-stack web applications as part of structured training projects

• Build and connect back-end APIs and services with front-end applications

• Practice key full-stack engineering concepts, including:

  • Back-end logic and API design

  • Front-end state management and data flow

  • Authentication and security basics

  • Software testing (unit, integration, end-to-end)

• Learn, at a practical level, how front-end, back-end, and cloud infrastructure interact

• Work with Unix-like environments and basic DevOps tooling

• Explain your technical decisions, trade-offs, and problem-solving approach during discussions and reviews

• Receive feedback from mentors and iteratively improve your implementation.

Program Structure

• Weeks 1-4: Full-Stack Application Development Project

• Week 5: DevOps & Infrastructure 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

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, Go, and React/Vue in TypeScript

• Are 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. For available batch information, please visit: 

recruit.hennge.com/en/gip

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 a final 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/

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

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.

HENNGE GIP Full Stack Admission Challenge:

Click here to register for the coding challenge (no time limit):

http://challenge.hennge.com/?entry-code=GIP-U

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, Go, or React/Vue in TypeScript

• 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:

https://stackshare.io/hennge/hennge-global-internship-program

Job Title: Python Developer - Data Analysts Intern 

Location: Hong Kong 

Job Type: Full-Time (open to Part-Timers for Final Year Undergrads or Postgraduate Students with Relevant Industry Experience) 

Job Description: 

We are looking for one or more Python Developers - Data Analytics to join our team to to work on large-scale data projects for a leading global financial institution. The ideal candidate will have experience in Python programming, data science, and handling both structured and unstructured data. Familiarity with flow control tools such as Apache Airflow is a plus. 

Responsibilities: 

• Develop, maintain, and optimize Python applications for data processing and analysis. 

• Manage and process large-scale databases, ensuring efficient storage and retrieval of data. 

• Perform data cleaning, statistical analysis, and develop predictive models. 

• Collaborate with cross-functional teams to integrate data solutions and support business objectives. 

• Optimize data workflows and processes for performance, scalability, and reliability. 

• Utilize tools like Apache Airflow to manage and automate complex data workflows. 

Qualifications: 

• Proficiency in Python and the  common data science libraries (e.g., Pandas, NumPy, Scikit-learn). 

• Experience with large-scale databases (SQL and NoSQL). 

• Familiarity with data visualization tools (e.g., Matplotlib). 

• Experience with flow control tools such as Apache Airflow a plus. 

• Relevant technical degree and experience in performing data analytics coding in Python. 

• Strong analytical and problem-solving skills. 

• Ability to work independently and as part of a team. 

Job Title: C++ Full-Stack Coder Intern 

Location: Hong Kong 

Job Type: Full-Time (open to Part-Timers for Final Year Undergrads or Postgraduate Students with Relevant Industry Experience) 

Job Description: 
We are seeking one or more skilled C++ Full-Stack Coders to join our dynamic team to carry out a large-scale implementation for a leading global financial institution. The ideal candidate will have extensive experience in both front-end and back-end development, with a strong proficiency in C++. Familiarity with CUDA and TensorFlow is a plus. 

Responsibilities: 

• Develop and maintain efficient, reusable, and reliable C++ code. 

• Design and implement scalable software solutions. 

• Collaborate with cross-functional teams to define, design, and ship new features. 

• Optimize applications for maximum speed and scalability. 

• Troubleshoot and debug issues across the stack. 

Qualifications: 

• Strong proficiency in C++. 

• Relevant technical degree and experience with high-performance computational techniques and libraries. 

• Familiarity with CUDA and TensorFlow is a plus. 

• Excellent problem-solving skills and attention to detail. 

• Ability to work independently and as part of a team. 

Job Title: Java/JavaScript Full-Stack Developer Intern 

Location: Hong Kong 

Job Type: Full-Time (open to Part-Timers for Final Year Undergrads or Postgraduate Students with Relevant Industry Experience) 

Job Description: 

We are looking for one or more talented Java/JavaScript Full-Stack Developers to join our team to carry out a large-scale implementation for a leading global financial institution. The ideal candidate will have experience in developing both front-end and back-end applications using Java and JavaScript. Familiarity with Spring and Hibernate is a plus. 

Responsibilities: 

• Design, develop, and maintain web applications using Java and JavaScript. 

• Implement server-side logic using Java frameworks. 

• Create responsive user interfaces using JavaScript frameworks. 

• Ensure the performance, quality, and responsiveness of applications. 

• Collaborate with other team members and stakeholders. 

Qualifications: 

• Proficiency in Java and JavaScript. 

• Relevant technical degree and experience with Java, Javascript, Spring and Hibernate frameworks. 

• Strong understanding of front-end technologies (e.g., HTML, CSS, JavaScript). 

• Excellent problem-solving skills and attention to detail. 

• Ability to work independently and as part of a team. 

Job Title: Cybersecurity + UNIX System Programmer/Admin Intern 

Location: Hong Kong 

Job Type: Full-Time (open to Part-Timers for Final Year Undergrads or Postgraduate Students with Relevant Industry Experience) 

Job Description: 

We are seeking a Cybersecurity and UNIX System Programmer/Admin to join our team to carry out a large-scale implementation for a leading global financial institution. The ideal candidate will have experience in system programming and administration with a focus on cybersecurity. Familiarity with OAUTH2 style security protocols is a plus. 

Responsibilities: 

• Develop, maintain, and optimize UNIX system software. 

• Implement and manage security protocols and measures. 

• Perform system security audits and provide technical support. 

• Troubleshoot and resolve system issues. 

• Collaborate with other IT professionals to enhance system security. 

Qualifications: 

• Proficiency in UNIX system programming and administration. 

• Relevant technical degree and experience with cybersecurity practices and protocols. 

• Familiarity with OAUTH2 style security protocols. 

• Strong problem-solving skills and attention to detail. 

• Ability to work independently and as part of a team. 

Job Title: Integration/Testing/QA Specialist Intern 

Location: Hong Kong 

Job Type: Full-Time (open to Part-Timers for Final Year Undergrads or Postgraduate Students with Relevant Industry Experience) 

Job Description: 

We are looking for an Integration/Testing/QA Specialist to join our team to carry out a large-scale implementation for a leading global financial institution. The ideal candidate will have experience in building API engines and familiarity with unit and overall automated testing frameworks. 

Responsibilities: 

• Develop and execute test plans and test cases. 

• Build and maintain API engines and deploy them to customer instances. 

• Perform unit and automated testing. 

• Identify, log, and track software defects. 

• Collaborate with developers to ensure seamless integration. 

Qualifications: 

• Relevant technical degree and experience in integration testing and QA. 

• Familiarity with API engine development. 

• Proficiency in unit and automated testing frameworks. 

• Strong problem-solving skills and attention to detail. 

• Ability to work independently and as part of a team. 

Job Title: Tech Support Specialist (Intern) 

Location: Hong Kong 

Job Type: Full-Time (open to Part-Timers for Final Year Undergrads or Postgraduate Students with Relevant Industry Experience) 

Job Description: 

We are seeking one or more Tech Support Specialists to provide technical assistance and support to our customers including a leading global financial institution. The ideal candidate will have experience in troubleshooting and resolving technical issues. 

Responsibilities: 

• Handle customer technical support cases through CRM and issue management systems. 

• Onboard and train new users. 

• Diagnose and troubleshoot software and access issues. 

• Provide timely and accurate customer feedback. 

• Maintain and update technical documentation. 

• Collaborate with other IT professionals to resolve complex issues. 

Qualifications: 

• Relevant technical degree and experience in technical support or a related field. 

• Strong problem-solving skills and attention to detail. 

• Excellent communication, customer service, and people skills. 

• Ability to work independently and as part of a team. 

• Familiarity with common operating systems and browser-based applications. 

We are hiring Software Engineering Interns to join our Engineering Team! We're open to students who:

• want to understand more about us and would love to spend some part-time hours with the company before joining us full-time; or
• keen on working on our internal side products and being coached by senior developers.

Read more about Oursky at Careers @ Oursky

Mode of Internship

This position is open to the following internship programme:

• Part-Time: at least 3 full days a week for at least 6 months, Physical
• 1-Year Internship: 8 - 12 months, Full-Time, Physical
• Applications through university Co-op Student Placement Programmes, Physical

Responsibilities

• Learn cutting-edge technologies in Web (JavaScript, HTML, Python, RoR, Golang) OR iOS / Android development.
• Learn the best practices in software development, including code review sessions to make sure your classes are properly designed, unit testing, usage and atomic commit to a git repository, etc.
• Learn to pay attention to details, especially how to implement beautiful UI with guidance and review by other developers and designers.
• Work with a team of rockstar developers!

We write code in the following tech stacks, but we don't expect you to know all of these coming in.

• Backend: Python, Go, TypeScript, C#, Rust, RoR
• Web Frontend / PWA: React.js, Vue.js, Flutter, Stimulus
• Storage / Cache: PostgreSQL, MySQL, Redis, Elastic Search
• Mobile: Native iOS (Swift), Android (Kotlin), React Native, Flutter
• Tools: Basecamp, Slack, GitHub, zube.io
• DevOps: Docker, K8s, GitHub Actions, Makefile

Requirements

• You want to work in a small team and hate bureaucratic processes;
• You’re a quick learner, geeky and love hacking stuff;
• You enjoy trying out new things and cutting-edge technologies;
• You love solving problems and code;
• You have experience or eager to learn Web Frontend and Backend technologies!

What We Offer

• Opportunity to learn within a successful tech company
• Opportunity to join us full time after graduation
• Flexible working hours
• Free drinks and snacks in the office
• Startup culture with a flat, dynamic environment