We are currently recruiting backend engineers for each project. Please review the details below.
We look forward to your application.

■Project:
P


Responsibilities:
Execute development and operational tasks related to our in-house product.
Coordinate expectations and schedules with various stakeholders (such as business owners, Product Managers, and Customer Support teams).
Provide on-the-ground feedback and propose ideas to continuously improve the development workflow.
Propose and implement process improvements aimed at AI-driven development.
※Depending on your career preferences, you may choose either a development specialist track or a management track.


Development Environment:
☆ Technologies & Tools

Backend:
JavaScript , jQuery), TypeScript , ), PHP (Laravel)

Frontend:
JavaScript (jQuery), TypeScript (React, )


AI:
Python


Cloud Infrastructure:
Azure


Databases:
MongoDB, AtlasDB

Analytics Platforms:
Zoho Analytics, BigQuery, Google Cloud Storage

CI:
GitHub Actions


Source Code Management:
GitHub


Monitoring:
Datadog, Sentry, New Relic

UI/


UX :
Figma

Backlog Management:
Backlog, Jira


Communication Tools:
Slack, Notion, Miro, Zoom


Required Skills:
☆ Experience
1–3 years of backend development experience using statically typed languages (e.g., Java, Go, TypeScript),
or 3–5 years of backend development experience using dynamically typed languages (e.g., PHP, Ruby, Python)
At least 1 year of experience in infrastructure operations and maintenance using cloud services (e.g., Azure, AWS, GCP)
Experience communicating and coordinating with business-side stakeholders
2+ years of experience in the development and operation of the same service
Experience working in Agile/Scrum development environments
Experience mentoring team members

☆ Skills
Japanese language proficiency equivalent to JLPT N1
Strong logical thinking
Excellent communication skills
Technical writing skills


Desired Skills:
☆ Experience
Experience leading a team
※Role type—such as Team Lead or Tech Lead—does not matter
Experience in the development and operation of SaaS products
Experience in development utilizing generative AI

☆ Knowledge
Knowledge of project management
Understanding of AI or data science domains
Knowledge of observability

☆ Personal Qualities
Openness and willingness to unlearn
Positive attitude and strong sense of teamwork
A proactive and optimistic mindset
Strong commitment to seeing tasks through
High sense of responsibility
Intellectual curiosity and eagerness to learn
Strong sense of ownership toward the product
Product ownership mindset
==============================

■Project:
A


Responsibilities:
Design and develop new features for our in-house product, Brand AI Agent
Improve, maintain, and operate existing features
Research and evaluate new technologies, and assess their applicability to the product
Collaborate with Product Managers, Product Owners, and AI Engineers to define specifications and enhance product quality


Development Environment:
☆ Technologies & Tools

Backend:
JavaScript , jQuery), TypeScript , ), PHP (Laravel)

Frontend:
JavaScript (jQuery), TypeScript (React, )


AI:
Python


Cloud Infrastructure:
Azure


Databases:
MongoDB, AtlasDB

Analytics Platforms:
Zoho Analytics, BigQuery, Google Cloud Storage

CI:
GitHub Actions


Source Code Management:
GitHub


Monitoring:
Datadog, Sentry, New Relic

UI/


UX :
Figma

Backlog Management:
Backlog, Jira


Communication Tools:
Slack, Notion, Miro, Zoom


Required Skills:
☆ Experience
Backend development experience for web services:1+ years using statically typed languages (e.g., Java, Go, TypeScript), or
3+ years using dynamically typed languages (e.g., PHP, Ruby, Python)

At least one of the following (1+ years):
Experience in planning and driving initiatives to improve development cycles, such as CI/CD implementation or test automation
Experience coordinating and negotiating with internal and external stakeholders from an engineering perspective
Experience in help desk, technical support, or support engineering

☆ Skills
Japanese language ability equivalent to JLPT N1

☆ Knowledge
Foundational Information Technology Engineer Examination (基本情報処理技術者資格) or equivalent knowledge
Knowledge of project management
Knowledge of observability


Desired Skills:
☆ Experience
Experience leading a team
Experience in building, operating, and maintaining infrastructure using Kubernetes services (e.g., EKS, GKE, AKS)
Experience in Agile/Scrum development
Experience developing solutions utilizing generative AI
Experience launching a service through personal/solo development

Experience solving highly complex technical challenges, including:
Managing technical debt with consideration for ROI
Resolving large-scale technical debt
Working with high-traffic, high-load systems

☆ Personal Qualities
Humility and willingness to unlearn
Positive attitude and strong sense of team contribution
Optimistic and constructive mindset
Strong sense of ownership and follow-through
High level of responsibility
Intellectual curiosity and eagerness to learn
Strong product ownership mindset
==============================

■Project:
O


Responsibilities:
As an engineering specialist or manager, you will be expected to take on one or more of the following roles:
★Backend Engineer
You will be responsible for backend development of our in-house product BOTCHAN and the new product AI Agent:
Design and develop APIs and server-side functionality for AI Agent features
Implement efficiency improvements using generative AI, such as code completion and automated test generation
Collaborate with AI engineers to validate features and drive implementation into the product
Research and evaluate new AI technologies and consider their application to the product

★DevOps Engineer
You will help balance service stability with development speed by improving operational efficiency:
Execute development and operational tasks through ticket-driven workflows
Coordinate with stakeholders, including business owners, PdMs, and CS teams
Enhance CI/CD pipelines and monitoring systems, and improve operational workflows to increase agility
Propose and implement improvements for security enhancement and system reliability


Development Environment:
☆ Technologies & Tools

Backend:
JavaScript , jQuery), TypeScript , ), PHP (Laravel)

Frontend:
JavaScript (jQuery), TypeScript (React, )


AI:
Python


Cloud Infrastructure:
Azure


Databases:
MongoDB, AtlasDB

Analytics Platforms:
Zoho Analytics, BigQuery, Google Cloud Storage

CI:
GitHub Actions


Source Code Management:
GitHub


Monitoring:
Datadog, Sentry, New Relic

UI/


UX :
Figma

Backlog Management:
Backlog, Jira


Communication Tools:
Slack, Notion, Miro, Zoom


Required Skills:
☆ Experience
1+ year of experience in operating and improving the same service
3+ years of backend development experience using statically typed languages (e.g., Java, Go, TypeScript) or
5+ years of backend development experience using dynamically typed languages (e.g., PHP, Ruby, Python)

☆ Skills
Japanese language ability equivalent to JLPT N1


Desired Skills:
☆ Experience
Management experience overseeing teams of 5 or more
Experience working in Agile/Scrum development environments
Experience managing development teams for SaaS products
Proven team leadership and management experience

☆ Personal Qualities
Open-mindedness and willingness to unlearn
Positive attitude and strong team contribution
Optimistic mindset
Perseverance and commitment to seeing tasks through
Strong sense of responsibility
Intellectual curiosity and eagerness to learn
Product ownership mindset


Work Location:

Office:
Tokyo, Shibuya-Ku

Fully remote work is acceptable only for residents within Japan (subject to consultation)
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