Full-stack Engineer (Leader/Member) KP

 

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:

o Design and develop products leveraging Large

Language Models (LLM).

 API Integration Projects:

 

 

o Lead projects to integrate multiple APIs and create

new APIs.

 Design and Implementation:

o Perform design and implementation with a focus on

performance and maintainability.

 Web Application Development:

o 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)

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

Learning and Development Support

 AI Tool Usage Support:

o Company covers the cost of using AI tools such as

JAPAN AI SaaS services, Cursor, ChatGPT, Claude, etc.

 

 

 Development Tool Support:

o If a desired development tool is paid, the cost is

covered (up to 30,000 yen per year)

 Book Purchase Assistance:

o Company covers the cost of purchasing books for

learning, such as technical books (up to 30,000 yen

per half-year)

 Language Learning / Qualification Support:

o Company covers the cost of Japanese or English

learning programs and qualification acquisition

 Refresh Allowance:

o Company covers the cost of services used for personal

refreshment (up to 5,000 yen per month)

o e.g., gym, yoga, chiropractic, aquarium, movies,

theme park tickets, etc.

 Housing Allowance:

o Housing allowance provided for those living in

designated areas (up to 30,000 yen per month)

 

 

Work Style

Hybrid Work: 3 days in office, 2 days remote

Flexible working hours: Core time is negotiable

Flexibility: Future consideration for more flexible work styles is possible

Why You’ll Love This Role

 Exposure to Cutting-Edge Technology:

o Work with the latest technologies, such as Generative

AI and LLM, to deepen your technical knowledge.

 Creative Environment:

o Design and develop products with creative freedom,

delivering user-friendly solutions.

 Growth Opportunities:

o Gain abundant career advancement opportunities in a

rapidly growing startup.

 Sense of Contribution:

o Work in a small, elite team where your ideas and

opinions directly impact the product.

 

 

Selection Process

CV Screening → Coding test → Multiple Interviews → Final Interview

(Reference checks are required before the final interview.)