Login or register to see your saved jobs and receive scout emails
Login or register to find a job
Job ID : 1566124 Date Updated : November 19th, 2025
Generative AI・LLM,Creative Environment

Full-stack Engineer/No Japanese required/AI company

Location Tokyo - 23 Wards
Job Type Permanent Full-time
Salary 7 million yen ~ 13 million yen

Work Style

Remote Work and WFH Casual Clothing Minimal Overtime Flex Time

Job Description

【Position】

Full-stack Engineer
Role : Leader or Member

As a Full-Stack Engineer, you will join our development team to lead the evolution of our AI products. You will be responsible for solving complex technical challenges in core functionalities and driving the development of products that continue to be chosen by customers.

 

【Job Description】

You will be responsible for developing SaaS applications utilizing Generative AI. Your role will include designing and building highly efficient and reusable systems, as well as developing complex web applications.

  • Product Development Using LLM:
    • Design and develop products leveraging Large Language Models (LLM).
  • API Integration Projects:
    • Lead projects to integrate multiple APIs and create new APIs.
  • Design and Implementation:
    • Perform design and implementation with a focus on performance and maintainability.
  • Web Application Development:
    • Develop frontend applications using TypeScript and Next.js.

【Team Structure】

Approximately 65 members are part of the development organization. Development is divided into the following groups:

  • Client Solution Development
  • In-house AI SaaS Development
  • Common Infrastructure Development (Infra / Data / AI R&D)

General Requirements

Minimum Experience Level Over 3 years
Career Level Mid Career
Minimum English Level Business Level
Minimum Japanese Level Basic
Minimum Education Level High-School
Visa Status Permission to work in Japan required

Required Skills

【Required Qualifications】

We are looking for candidates with:

  • Bachelor's or Master's degree in Computer Science, Software Engineering, Artificial Intelligence, Machine Learning, Mathematics, Physics, or related fields
  • 3+ years of experience in web application development using modern frameworks.
  • 2+ years of experience in server-side implementation.
  • Proficiency in at least one backend language (e.g., Python, Java).
  • Experience with cloud services (AWS, GCP, Azure) and understanding of container technologies (Docker, Kubernetes).
  • Fluency in English and/or Japanese (business level or higher in at least one language).

 

【Preferred Qualifications】

Candidates with the following experience or skills will be highly regarded:

  • Experience in developing SaaS web applications.
  • Experience in designing and building large-scale, complex architectures.
  • Basic understanding and interest in Generative AI.
  • Ability to stay updated on the latest technology trends and share knowledge within the organization.

 

【Tech Stack】

  • Languages: Python (for framework development), TypeScript / React / Next.js (for frontend development) / NX
  • Infrastructure: GCP (containers / Kubernetes), Docker
  • Tools: Slack, Confluence, Linear, Google Workspace, GitHub, Notion
  • Work Environment: Mac (Apple Silicon), dual monitors available

Job Location

  • Tokyo - 23 Wards

Work Conditions

Job Type Permanent Full-time
Salary 7 million yen ~ 13 million yen
Salary Bonuses Bonuses paid on top of indicated salary.
Industry Other (IT, Internet, Gaming)

Job Category