Full Stack Software Engineering Internship

Begin the Application:Click here to register for the coding challenge (no time limit). We're moving!HENNGE is tentatively scheduled to relocate our Tokyo headquarters from Shibuya to Shinjuku in April 2027. Depending on your batch, your internship will take place at either our current Shibuya hub or our brand-new Shinjuku office. About the ProgramHENNGE’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 our Tokyo headquarters. 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. Internship ScheduleBatch 1 (2027): Jan 18 • Feb 19 (5 weeks)Batch 2 (2027): Jun 1 • Jul 16 (7 weeks)What You’ll Learn & PracticeDuring the program, you will:Develop full-stack web applications as part of structured training projectsBuild and connect back-end APIs and services with front-end applicationsPractice key full-stack engineering concepts, including:Back-end logic and API designFront-end state management and data flowAuthentication and security basicsSoftware testing (unit, integration, end-to-end)Learn, at a practical level, how front-end, back-end, and cloud infrastructure interactWork with Unix-like environments and basic DevOps toolingExplain your technical decisions, trade-offs, and problem-solving approach during discussions and reviewsReceive feedback from mentors and iteratively improve your implementation. Program StructureMonday to Friday, 10:00-19:00 JSTWeeks 1-4: Full-Stack Application Development ProjectWeek 5: DevOps & Infrastructure Project Benefits Round-trip airfares from and back to your country of residencePre-arrival support and visa guidanceMedical 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 activitiesSubsidized 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 divisionsAccess 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 internsHow to applyRegister through the link at the top or bottom of the job description and verify your email address.Solve the coding challenge and submit your work with your CV and cover letter.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. Our Stance on AI and Software EngineeringAI 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 ApplicantsA 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. Begin the Application:Click here to register for the coding challenge (no time limit). Essential QualificationsThird-year undergraduate or higher (including Master's and Doctoral students). Recent graduates are welcome to applyPursuing or holding a degree in Computer Science or a related field. If not, equivalent experience from a tech internship or bootcamp is expectedFluency in English (Japanese not required)Proficiency in Python, Go, or React/Vue in TypeScriptKnowledge of Linux / MacOS / Unix-like environmentsInterested in open source or tech community activitiesInterested in pursuing a career in Japan At least meet three of the following:Experience in cloud computing platforms, especially AWSExperience in full stack web application developmentKnowledge of distributed systemsKnowledge 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 can be found on the HENNGE website. Our Ideal CandidateOur 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 TypeScriptAre comfortable working in Unix-like environmentsHave a solid grasp of both front-end and back-end developmentHave an interest in cloud computing and DevOps practicesAre passionate about learning, contributing to tech communities, and possibly pursuing a career in JapanBring your curiosity, versatility, and drive—we’re excited to see what you can build with us. Essential QualificationsThird-year undergraduate or higher (including Master's and Doctoral students). Recent graduates are welcome to applyPursuing or holding a degree in Computer Science or a related field. If not, equivalent experience from a tech internship or bootcamp is expectedFluency in English (Japanese not required)Proficiency in Python, Go, or React/Vue in TypeScriptKnowledge of Linux / MacOS / Unix-like environmentsInterested in open source or tech community activitiesInterested in pursuing a career in Japan At least meet three of the following:Experience in cloud computing platforms, especially AWSExperience in full stack web application developmentKnowledge of distributed systemsKnowledge 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 can be found on the HENNGE website. Our Ideal CandidateOur 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 TypeScriptAre comfortable working in Unix-like environmentsHave a solid grasp of both front-end and back-end developmentHave an interest in cloud computing and DevOps practicesAre passionate about learning, contributing to tech communities, and possibly pursuing a career in JapanBring your curiosity, versatility, and drive—we’re excited to see what you can build with us.