Top-Selling Points

Rate of Foreigners

Less Than

Frequency of English Usage

Less Than

Short overtime work (less than 20 hours) Japanese learning support Management In-house product development

Top-Selling Points

Rate of Foreigners
Less Than

Frequency of English Usage
Less Than

Short overtime work (less than 20 hours) Japanese learning support Management In-house product development

Related Skills

Library/Framework

Django React Next.js

Programming Language

Go Python TypeScript

Cloud / Infrastructure / DevOps tools

AWS Terraform

Language Requirements

Required

Preferred

Language Requirements

Required

Japanese: Business

English: Greetings/None

JLPT: None

Preferred

No Data

Job Description

[Business Overview] 
The company develops and operates the "Hayaimon Series," a suite of 13 Real Estate Brokerage DX SaaS products. These solutions automate manual onsite tasks such as property data entry and vacancy confirmation. With implementation in over 3,500 stores nationwide, the company holds a top-tier market share and drives digital transformation across the industry.

[Recruitment Background]
Following the rapid growth of the "Hayaimon Series," the company is strengthening its organization and development speed in preparation for an upcoming IPO. We are seeking an immediate-asset Full-Stack Engineer who can lead development from the planning stage to release without being limited to a specific technical domain. We expect you to accelerate product evolution through your broad technical expertise.

[Job Overview] 
Solve diverse product development challenges through technical expertise. Without being confined to a specific field, you will take charge of cross-functional implementations necessary for service growth, including Chrome Extensions (TypeScript), Web Frontend (React), Backend APIs (Django/FastAPI), and data analysis infrastructure. This position requires the drive to handle design, implementation, and verification independently—even for tasks with loosely defined specifications—to achieve speedy releases.

[Key Responsibilities]
・Frontend Development: Design and development using React/Next.js and Chrome Extension development using TypeScript.
・Server-side Development: API design and development primarily using Python (Django/FastAPI).
・Tech Selection and Design: Broad involvement from requirement definition for new features to selecting tech stacks and architectural design.
・Security: Addressing vulnerabilities and ensuring system security.

[Organizational Structure]
・Engineering Manager: 1
・Frontend Engineers: 20 (including 2 also handling server-side)
・Server-side Engineers: 2
・Infrastructure Engineers: 2

[Development Environment]
・Languages: JavaScript, TypeScript, HTML, CSS, Python, Go
・Frameworks/Libraries: React, Next.js, Vue.js, Nuxt.js, Django, FastAPI
・Testing: Jest, pytest
・Infrastructure: AWS (EC2, ECS, AWS Batch, RDS, Aurora Serverless V2, Glue, Athena, API Gateway, Terraform)
・Tools: Notion, QuickSight, Git, Slack, Google Meet, GitHub, GitHub Copilot, Claude Code, CodeRabbit, Figma

[Learning Environment] 
The company hosts internal study sessions twice a week and fully covers expenses for attending conferences outside the prefecture, ensuring employees stay updated on the latest technologies.

[Position Highlights]
・High level of autonomy to participate in everything from design to implementation and technology selection.
・Gain hands-on experience across multiple layers of web service development, including Frontend (React/TypeScript), Backend (Python/Django), Chrome Extensions, and Security.

Required Skills and Experiences

[Mandatory Requirements] ・Over 3 years of professional experience covering both frontend and server-side domains in web service development. ・Modern frontend development experience using TypeScript (familiarity with build tools such as Webpack or Vite). ・Practical background in server-side development using full-stack frameworks like Django (open to any programming language). [Preferred Requirements] ・Development experience using Python. ・Hands-on experience with Django or FastAPI. ・Familiarity with React-based frameworks. ・Experience in building or improving CI/CD pipelines. [Desired Candidate Profile] ・Resonates with our corporate vision and professional style. ・Maintains smooth and effective communication with internal team members.

After sign up, you can browse all information.

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Working Condition

[Expected Annual Salary]
5,000,000 JPY - 7,000,000 JPY

[Monthly Salary]
416,000 JPY - 584,000 JPY (Base salary: 316,952 JPY+ / Fixed overtime allowance: 99,048 JPY+ for 40 hours per month. Excess overtime paid separately.)

[Work Location]
Kayabacho Tower 12F, 1-21-2 Shinkawa, Chuo-ku, Tokyo
‐7-minute walk from Kayabacho Station (Tokyo Metro Hibiya Line)
‐8-minute walk from Hatchobori Station (JR Keiyo Line)
‐9-minute walk from Suitengumae Station (Tokyo Metro Hanzomon Line)

[Working Hours]
・Flextime System
‐Core time: 11:00 AM – 3:00 PM
‐Flexible time: Start 7:00 AM – 11:00 AM / End 3:00 PM – 10:00 PM
‐Standard working hours: 8 hours per day (approx. 160 hours per month)
*Average monthly overtime: 14 hours (previous year's result)
・Remote work: 2 days per week for engineers / 1 day per week for business staff

[Holidays and Leave]
・125 annual holidays: Full weekends off (Sat/Sun), public holidays, New Year, and summer leave.
・Paid leave: 5 days granted upon joining, additional 5 days after 6 months.
・Paid leave utilization rate: 81% (previous year's result)
・Others: Based on company calendar.

[Benefits and Welfare]
・Full social insurance coverage
・Commuting allowance
・High-spec office chairs and choice of MacBook Pro or Windows laptop
・Office lounge/kitchen, free drinks, free rice, and subsidized bento lunches
・Monthly recreation events, weekly shuffle lunches, and company trips
・Book purchase allowance (approx. 20,000 JPY/year), support for study groups/conferences, and certification support
・Influenza vaccinations

RECRUITMENT PROCESS

・Casual Interview (Online) ↓
・Document Screening & Online Aptitude Test ↓
・Interview (Online) ↓
・Final Interview (In-person)
*Please note that the selection process is subject to change depending on the position.

Business (description what they do)

・Planning and development of systems and applications (SaaS) for the real estate industry ・Development and operation of the "Hayaimon Series," a real estate brokerage business support system

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Top-Selling Points

Rate of Foreigners

Less Than

Frequency of English Usage

Less Than

Short overtime work (less than 20 hours) Japanese learning support Management In-house product development

Top-Selling Points

Rate of Foreigners
Less Than

Frequency of English Usage
Less Than

Short overtime work (less than 20 hours) Japanese learning support Management In-house product development

Related Skills

Library/Framework

Django React Next.js

Programming Language

Go Python TypeScript

Cloud / Infrastructure / DevOps tools

AWS Terraform

Language Requirements

Required

Preferred

Language Requirements

Required

Japanese: Business

English: Greetings/None

JLPT: None

Preferred

No Data

Job Description

[Business Overview] 
The company develops and operates the "Hayaimon Series," a suite of 13 Real Estate Brokerage DX SaaS products. These solutions automate manual onsite tasks such as property data entry and vacancy confirmation. With implementation in over 3,500 stores nationwide, the company holds a top-tier market share and drives digital transformation across the industry.

[Recruitment Background]
Following the rapid growth of the "Hayaimon Series," the company is strengthening its organization and development speed in preparation for an upcoming IPO. We are seeking an immediate-asset Full-Stack Engineer who can lead development from the planning stage to release without being limited to a specific technical domain. We expect you to accelerate product evolution through your broad technical expertise.

[Job Overview] 
Solve diverse product development challenges through technical expertise. Without being confined to a specific field, you will take charge of cross-functional implementations necessary for service growth, including Chrome Extensions (TypeScript), Web Frontend (React), Backend APIs (Django/FastAPI), and data analysis infrastructure. This position requires the drive to handle design, implementation, and verification independently—even for tasks with loosely defined specifications—to achieve speedy releases.

[Key Responsibilities]
・Frontend Development: Design and development using React/Next.js and Chrome Extension development using TypeScript.
・Server-side Development: API design and development primarily using Python (Django/FastAPI).
・Tech Selection and Design: Broad involvement from requirement definition for new features to selecting tech stacks and architectural design.
・Security: Addressing vulnerabilities and ensuring system security.

[Organizational Structure]
・Engineering Manager: 1
・Frontend Engineers: 20 (including 2 also handling server-side)
・Server-side Engineers: 2
・Infrastructure Engineers: 2

[Development Environment]
・Languages: JavaScript, TypeScript, HTML, CSS, Python, Go
・Frameworks/Libraries: React, Next.js, Vue.js, Nuxt.js, Django, FastAPI
・Testing: Jest, pytest
・Infrastructure: AWS (EC2, ECS, AWS Batch, RDS, Aurora Serverless V2, Glue, Athena, API Gateway, Terraform)
・Tools: Notion, QuickSight, Git, Slack, Google Meet, GitHub, GitHub Copilot, Claude Code, CodeRabbit, Figma

[Learning Environment] 
The company hosts internal study sessions twice a week and fully covers expenses for attending conferences outside the prefecture, ensuring employees stay updated on the latest technologies.

[Position Highlights]
・High level of autonomy to participate in everything from design to implementation and technology selection.
・Gain hands-on experience across multiple layers of web service development, including Frontend (React/TypeScript), Backend (Python/Django), Chrome Extensions, and Security.

Required Skills and Experiences

After sign up, you can browse all information.

If you already have a GitTap Account, please login.

Working Condition

[Expected Annual Salary]
5,000,000 JPY - 7,000,000 JPY

[Monthly Salary]
416,000 JPY - 584,000 JPY (Base salary: 316,952 JPY+ / Fixed overtime allowance: 99,048 JPY+ for 40 hours per month. Excess overtime paid separately.)

[Work Location]
Kayabacho Tower 12F, 1-21-2 Shinkawa, Chuo-ku, Tokyo
‐7-minute walk from Kayabacho Station (Tokyo Metro Hibiya Line)
‐8-minute walk from Hatchobori Station (JR Keiyo Line)
‐9-minute walk from Suitengumae Station (Tokyo Metro Hanzomon Line)

[Working Hours]
・Flextime System
‐Core time: 11:00 AM – 3:00 PM
‐Flexible time: Start 7:00 AM – 11:00 AM / End 3:00 PM – 10:00 PM
‐Standard working hours: 8 hours per day (approx. 160 hours per month)
*Average monthly overtime: 14 hours (previous year's result)
・Remote work: 2 days per week for engineers / 1 day per week for business staff

[Holidays and Leave]
・125 annual holidays: Full weekends off (Sat/Sun), public holidays, New Year, and summer leave.
・Paid leave: 5 days granted upon joining, additional 5 days after 6 months.
・Paid leave utilization rate: 81% (previous year's result)
・Others: Based on company calendar.

[Benefits and Welfare]
・Full social insurance coverage
・Commuting allowance
・High-spec office chairs and choice of MacBook Pro or Windows laptop
・Office lounge/kitchen, free drinks, free rice, and subsidized bento lunches
・Monthly recreation events, weekly shuffle lunches, and company trips
・Book purchase allowance (approx. 20,000 JPY/year), support for study groups/conferences, and certification support
・Influenza vaccinations

RECRUITMENT PROCESS

・Casual Interview (Online) ↓
・Document Screening & Online Aptitude Test ↓
・Interview (Online) ↓
・Final Interview (In-person)
*Please note that the selection process is subject to change depending on the position.

Business (description what they do)

・Planning and development of systems and applications (SaaS) for the real estate industry ・Development and operation of the "Hayaimon Series," a real estate brokerage business support system

Available Jobs in (iimon Inc.)

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[Full-Stack Engineer] Python/Go/Next.js | 13 In-house SaaS Products | Preparing for IPO

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