With you joining us,
the world becomes more interesting.
We are not just aiming for business expansion.
We want to create essential value that resonates with people's hearts around the world and have global influence. In an internationally diverse team, incorporating various perspectives, you can give shape to your ideas.
What we expect from you
- Full Stack Engineer: Accelerate stories with technology
We seek not just someone who writes code, but a presence that leads product growth. - Engineer: Embody user experience in code
A critical requirement directly linked to our service's conversion rate and user retention rate. - Global Business Development: Pioneer new paths to the world
Lead the mission of delivering Japanese stories worldwide from a business perspective.
Recommended for
- Those who want to be involved in services that influence the world
- Those who want to grow while touching the latest technology
- Those who want to work in an international team
We highly value your passion for technology.
If you are even slightly interested in this challenge, please feel free to contact us.
First, why not have a casual chat about our technical initiatives?
Job Requirements
Story & Manga AI Generation Platform
"JAPANMEDIAI" Development Engineer Recruitment
Full Remote / Full Flex / 100% In-house Development
Developing a Manga AI Generation Platform with Next.js + TypeScript + OpenAI API
Annual Salary: 3.5M - 10M JPY + Stock Options Available
Following the launch of the story and manga AI generation platform "JAPANMEDIAI", development tasks are increasing. Currently, we are developing with a small elite team, but to further accelerate product growth, we are recruiting additional engineers committed to in-house service development.
A platform aiming to enable people who have manga ideas but lack drawing skills to create manga content from stories using AI.
《Main Implemented Features》
・AI generation of synopses/episodes/scripts
・Story consistency check
・Character creation & management
・Manga page generation by style (Name/Draft, Inking, Coloring)
・Point-based billing system
・Team usage functions
《Features Currently Planned for Development》
・Free trial function
・i18n (Internationalization) support
You will be responsible for improving existing functions, developing new features, and maintenance/operation.
《Examples of Development Content》
・Frontend: UI implementation with Next.js App Router + React Hooks
・Backend: API implementation with Next.js Server Actions, DB design/optimization using Prisma
・AI Integration: Prompt implementation/cost optimization/quality improvement for OpenAI API
・Payment: Stripe subscription/point purchase/Webhook processing
・Image Processing: Manga image editing/optimization using Sharp/Canvas
・Authentication: Email auth/2FA implementation with NextAuth.js
・Infrastructure: CI/CD with GitHub Actions, GMO Cloud/Wasabi storage management
・Performance: DB query optimization, image delivery optimization, real-time updates via SSE
・Maintenance: Troubleshooting, log monitoring, performance tuning
《Frontend》
・Next.js (App Router)
・React (Hooks)
・TypeScript
・Tailwind CSS
《Backend》
・Next.js (Server Actions)
・Node.js
・PostgreSQL
・Prisma
《AI & Image Processing》
・OpenAI API (Text/Image generation models)
・Sharp (Image conversion/optimization)
・Canvas (Image editing)
《Payment & Billing》
・Stripe (Subscription/Point purchase)
・Webhook processing
・Real-time balance updates (Server-Sent Events)
《Infrastructure》
・GMO Cloud
・Wasabi (Storage)
・GitHub Actions (CI/CD)
《Development Tools》
・Git/GitHub (PR & Issue-based development)
《Team Composition》
・1 PM + 4 Engineers
《Work Style》
・Full Remote / Full Flex
・Average monthly overtime: About 20 hours
・Communication: Primarily chat-based via Slack
《Assignment Details》
You will handle platform maintenance, operation, renovation, and new feature development via remote work.
After joining, you will work alongside 1 PM and 4 members.
Currently engaged in development, with 1+ years of team development experience.
《Required Skills (Practical Experience)》
■ 1+ years of engineering experience AND practical achievements using Next.js / Node.js / Python / AI development / AWS, etc.
OR operational achievements with manga or video content platforms.
■ No educational background required
《Welcomed Skills》
＜Technical＞
・Development experience with OpenAI API (LLM, dall-e-3, image-1)
・Development experience with Stripe Payment API, CLI
・Implementation experience in image processing (resize, background transparency, synthesis, optimization, etc.)
・Experience with i18n (internationalization)
・Experience building CI/CD with GitHub Actions
・Experience building/operating infrastructure using AWS, etc.
＜Product＞
・Experience creating manga or subculture content
【People who want to compete with technology】
・Latest Tech: Want to develop with modern tech like Next.js App Router, React Hooks
・AI Development: Want to heavily use OpenAI API in real products
・Full Stack: Want to experience frontend/backend composite tech and infrastructure
・Architecture: Want to experience everything from design to implementation and operation
【People who want to be directly involved in the product】
・100% In-house Dev: Your code reaches users directly
・Shape Opinions: Implement ideas like "it would be better if we did this"
・Participate from Planning: Get involved from the function design stage
・Small Team: Fast decision-making, immediate implementation
【People who want to work efficiently】
・Fully Remote, Full Flex: Zero wasted commute time, work from anywhere
・AI Tool Subsidy: Use latest tools like Claude Max at company expense (Check details)
・Focus on Dev: Secure development time with minimum necessary meetings
【Maybe not suitable for】
・Not good at learning new technologies (Tech stack updates regularly)
・Prefer waiting for instructions rather than voicing opinions (Proactivity is valued)
・Cannot concentrate remotely (Self-management is required)
【Experience in any of the following】
■ Web development using HTML5 / CSS3 / JavaScript
■ Ability to use modern frontend frameworks like React / Vue.js / Angular
■ Backend development using Node.js / Python, etc.
■ RDB database operation experience (MySQL, PostgreSQL, etc.)
■ Team development experience using Git
【Welcomed Experience & Skills】
■ Knowledge of CI/CD and experience with automation tools
■ Development experience with Next.js
■ Experience using OpenAI
■ Experience building systems using cloud infrastructure
■ Knowledge of container management using Docker or Kubernetes
■ Experience with Test-Driven Development (TDD) or Agile development
・Annual Salary: 3.5M - 10M JPY (12 installments + allowances)
・Determined based on experience/skills (Age does not matter)
・Salary Review: Twice a year (Jan/Aug)
・Bonus: Once a year (Aug, performance-based incentive) (Check details)
・Overtime Pay: Overtime work is paid separately in full (Check details)
・Probation Period: 3-6 months (Conditions same as permanent employment)
【AI Development Tool Subsidy System (Full-time Employees Only)】
・Use your favorite AI tools at company expense up to 30,000 JPY/month.
＜Target Tool Examples＞
・Claude Max
・ChatGPT Pro
＜Mechanism＞
・Apply for the tool you want to use at the beginning of the month
・Contract with a personal account (not a company account)
・Submit invoice/receipt for expense reimbursement
・Company covers up to 30,000 JPY/month
・Full Transportation Expenses Paid
・Incentives available *Based on performance
・Stock Option System available
・Casual Dress Code
・No Smoking in Office
Job Requirements
(Part-time / Outsourcing)
① Translation & Typesetting Staff
- Typesetting translated manga dialogue into tools (Clip Studio, etc.)
- Checking translation content in spreadsheets and reflecting it in manga
- Basic editing tasks such as layout adjustment and font unification
- Communication with the manga production team
- Japanese/English or multilingual skills (Level capable of translation checking)
- Basic PC operation
- Experience using production tools like Clip Studio is welcomed
- Inexperienced candidates welcome (Training provided)
- Full Remote Available
- Flexible response according to workload
② IP Sales Staff
- Proposal sales to publishers and IP holders
- Support for work usage licensing and contract creation
- Research and coordination for overseas IP
- Creation of simple materials (Planning docs/Presentation materials)
- Interest in the publishing industry and IP business
- Experience in sales and business emails
- Reading comprehension and document creation skills in Japanese and simple English
- Experience in IP-related work is preferred
- Fully Remote Available
- Performance-based / Hourly / Monthly fixed (Negotiable)
③ Content Platform Operation Staff
- Operation support for our manga platform (JAPANMEDIA)
- Registration, update, and checking of content
- Reading MBJ manuals and understanding all flows up to operation
- Creating user inquiry response manuals, etc.
- Responding to inquiries from creators/users (Mainly template responses)
- Support for SNS and announcement posts
- Interest in web service operation
- Basic PC operation (Google Workspace / Notion / Excel, etc.)
- Good at writing texts
- Inexperienced candidates welcome
- Full Remote Available
- Flexible shifts/hours
④ Production / BtoB Project Management Staff
- Progress management for BtoB manga/anime production projects
- Communication with clients (Email/Chat)
- Schedule management and delivery management
- Bridging tasks with the internal production team
- Experience in progress management/project management is welcomed
- Ability to use basic IT tools (Google Drive, Slack, etc.)
- Polite communication skills
- Experience in the production industry is a plus
- Full Remote Available
- Hourly, Monthly, Per-project contracts flexibly negotiable
Common Items
Hourly / Monthly / Performance-based all possible
- Resume / Curriculum Vitae
- Portfolio (Optional, only for typesetting/production experience)
- Please state your desired role and desired compensation