FUSIONIA Inc.

【Tokyo】System Engineer｜Flexible Project Selection｜80% Remote｜Java,PHP,C#｜90% Join with Higher Salary

Backend Engineer 1 More

4M - ***M JPY

Tokyo

Full-time (permanent)

Online Interview: Yes

Remote Work from Overseas: No / From Japan: Yes

Top-Selling Points

Rate of Foreigners

Less Than

Frequency of English Usage

Less Than

Remote work Japanese learning support Short overtime work (less than 20 hours) Management Start-up International employees

Top-Selling Points

Rate of Foreigners
Less Than

Frequency of English Usage
Less Than

Remote work Japanese learning support Short overtime work (less than 20 hours) Management Start-up International employees

Related Skills

Programming Language

C# PHP Java .NET Python

Language Requirements

Required

Preferred

Language Requirements

Required

Japanese: Business

English: Greetings/None

Preferred

No Data

Job Description

【Recruitment Background】
◆ To expand our team alongside company growth
With a strong track record in system development, we receive numerous project requests from clients. To meet these growing demands, we are seeking to expand our engineering team.


【Job Description】
■ Assigned Department: Onsite Service Division
You will participate in development projects at client sites. Project assignments are determined with the engineer's preferences as the top priority, and ongoing support is provided even after joining a client project.


■ Key Responsibilities
We offer opportunities across a wide range of processes in diverse projects. Depending on your experience, you may also take on leadership or management roles.
－Requirements definition
－Basic design
－Detailed design
－Development (coding/programming)
－Testing
－Release
－Operations and maintenance


【Project Examples】
■ Accounting System Development
Phases: Requirements definition to design and implementation
Language: Java

■ University Application System Customization
Phases: Design to testing
Language: PHP (Laravel)
Environment: AWS

■ 0→1 New Development Project
Phases: Design to release
Language: Python
Environment: Linux


【Project Details】
●Duration: 6 months to 6 years
●Team Size: Individual to teams (up to 10 members)
●Assignment Process: Determined through discussions with our sales team and client interviews after joining


【Comprehensive Support System】
◎ Tailored Assignments Based on Your Preferences
We take into account your detailed preferences regarding salary, working hours, skills you want to acquire, and career goals to match you with the most suitable workplace. In some cases, we may even secure new clients to better accommodate your needs.
Examples:
●For those seeking upstream processes → Opportunities to utilize and enhance existing skills.
●For those returning from a career gap → Projects to help gradually rebuild skills.

◎ Ongoing Support During Projects
Even after project assignment, we maintain regular follow-ups to ensure smooth progress.
●Workload Issues: If your workload becomes excessive, we negotiate with clients to increase team size or distribute tasks.
●Consultation Opportunities: Our dedicated sales team and career advisors are always available to address your concerns.


【Why Join Us?】
◎ Earn up to ¥1,000,000 Salary Increase Upon Joining!
90% of our engineers join with a higher salary than their previous roles. We evaluate your skills and experience fairly and provide compensation that matches your value.

◎ Accelerated Career Growth
With semi-annual evaluations, promotions are based on clear and transparent criteria. We use a multi-faceted approach, incorporating client, self, and sales evaluations to ensure fairness. Experienced engineers have ample opportunities to quickly step into leadership roles.

◎ Project Selection System
We match projects to your experience, preferences, skills, and aspirations. This ensures you're working on the most suitable projects to efficiently advance your skills and career.

◎ 80% Remote Work Ratio
Flexible work arrangements allow you to focus deeply on your tasks while achieving an excellent work-life balance.


【Voices from Mid-Career Hires】
"I transitioned from a role focused on operations and maintenance to improve my coding skills. The company’s commitment to my career during the interview and post-offer project discussions convinced me to join."
"I saw opportunities for both personal growth and contributing to the establishment of an engineering organization, which motivated my decision."

Required Skills and Experiences

【Required Qualifications】 ■ Experience in web and open system development (Languages: Java, PHP, C#, .NET, Python) ■ Business-level Japanese proficiency or higher (Equivalent to JLPT N1) ※ No restrictions on career gaps or the number of previous job changes. ※ Educational background is not required. 【Preferred Qualifications】 ■ Motivated to further enhance your technical skills. ■ Interested in taking on upstream processes or roles as a PM/PL. ■ Experience in management.

After sign up, you can browse all information.

If you already have a GitTap Account, please login.

Working Condition

【Expected Annual Salary】
¥4,200,000–¥7,800,000
Monthly Salary: ¥350,000–¥650,000
(System Engineer, PL: ¥450,000+ / PM: ¥550,000+)
＊Determined based on previous salary, experience, skills, and age
＊Salary review: Twice a year + additional opportunities as needed
＊Includes fixed overtime pay for 20 hours; additional hours compensated separately


【Location Details】
■ Tokyo Headquarters or project sites
Tokyo Headquarters
7F, Imasu Hamada Building, 7-4-7 Nishi-Shinjuku, Shinjuku-ku, Tokyo

Project Sites
90% of projects are in central Tokyo:
Shinjuku, Shibuya, Ikebukuro, Ginza, Roppongi, Shinagawa, Shiodome, Odaiba, etc.

【Access】
Tokyo Headquarters
9-minute walk from JR and subway lines at Shinjuku Station
3-minute walk from Shinjuku-Nishiguchi Station (Toei Oedo Line)
7-minute walk from Seibu-Shinjuku Station (Seibu Shinjuku Line)

【Working Hours】
9:30 AM – 6:30 PM

【Benefits & Welfare】
－Position Allowance
－Marriage & Childbirth Allowance
－Overtime Allowance (paid for additional hours beyond fixed overtime)
－Commuting Allowance (up to ¥25,000/month)
－Full Social Insurance (Employment, Workers' Compensation, Health, Pension)
－Education & Training Support (external training programs / e-learning)
－Membership in Kanto IT Health Insurance Association
－Certification Support Program
－Library System
－Company Events (occasional, e.g., barbecues and year-end parties)
＜Ongoing In-House Study Groups＞
Engineer-led study sessions and internal curriculums available

【Holidays & Leave】
－Full two-day weekends (Saturday and Sunday)
－Public holidays, summer vacation
－Year-end/New Year holidays
－Paid leave
－Bereavement leave

RECRUITMENT PROCESS

1.Document screening
2.1st interview (hiring manager)
3.Final interview (division/officer interview)
We expect it to take about 2~3 weeks from the application screening to the informal offer.

Business (description what they do)

On-site service business Solution Business

Available Jobs in (FUSIONIA Inc.)

Recommended Jobs

Givery, Inc.

【Resola_ Full Stack Engineer】AI×Marketing DX | Global Environment | Full Remote | In-house SaaS

7M - ***M JPY | Tokyo

HTML CSS Python

WeStyle Co., Ltd.

AI Research and Development Engineer

3M - ***M JPY | Tokyo

Python Java PHP

Nautilus Technologies, Inc.

[Java Engineer]World's fastest level RDB/Hybrid work/Support Building data processing infrastructure

4M - ***M JPY | Tokyo

Java System design (detail) System Design (Fundamental)

HEROZ, Inc.

[AI engineer] Machine Learning Engineer wanted to amaze the world with AI technology!

5.5M - ***M JPY | Tokyo

C++ Java Python

FUSIONIA Inc.

【Tokyo】System Engineer｜Flexible Project Selection｜80% Remote｜Java,PHP,C#｜90% Join with Higher Salary

Backend Engineer 1 More

4M - ***M JPY

Tokyo

Full-time (permanent)

Online Interview: Yes

Remote Work from Overseas: No / Remote Work in Japan: Yes

Top-Selling Points

Rate of Foreigners

Less Than

Frequency of English Usage

Less Than

Remote work Japanese learning support Short overtime work (less than 20 hours) Management Start-up International employees

Top-Selling Points

Rate of Foreigners
Less Than

Frequency of English Usage
Less Than

Remote work Japanese learning support Short overtime work (less than 20 hours) Management Start-up International employees

Related Skills

Programming Language

C# PHP Java .NET Python

Language Requirements

Required

Preferred

Language Requirements

Required

Japanese: Business

English: Greetings/None

Preferred

No Data

Job Description

【Recruitment Background】
◆ To expand our team alongside company growth
With a strong track record in system development, we receive numerous project requests from clients. To meet these growing demands, we are seeking to expand our engineering team.


【Job Description】
■ Assigned Department: Onsite Service Division
You will participate in development projects at client sites. Project assignments are determined with the engineer's preferences as the top priority, and ongoing support is provided even after joining a client project.


■ Key Responsibilities
We offer opportunities across a wide range of processes in diverse projects. Depending on your experience, you may also take on leadership or management roles.
－Requirements definition
－Basic design
－Detailed design
－Development (coding/programming)
－Testing
－Release
－Operations and maintenance


【Project Examples】
■ Accounting System Development
Phases: Requirements definition to design and implementation
Language: Java

■ University Application System Customization
Phases: Design to testing
Language: PHP (Laravel)
Environment: AWS

■ 0→1 New Development Project
Phases: Design to release
Language: Python
Environment: Linux


【Project Details】
●Duration: 6 months to 6 years
●Team Size: Individual to teams (up to 10 members)
●Assignment Process: Determined through discussions with our sales team and client interviews after joining


【Comprehensive Support System】
◎ Tailored Assignments Based on Your Preferences
We take into account your detailed preferences regarding salary, working hours, skills you want to acquire, and career goals to match you with the most suitable workplace. In some cases, we may even secure new clients to better accommodate your needs.
Examples:
●For those seeking upstream processes → Opportunities to utilize and enhance existing skills.
●For those returning from a career gap → Projects to help gradually rebuild skills.

◎ Ongoing Support During Projects
Even after project assignment, we maintain regular follow-ups to ensure smooth progress.
●Workload Issues: If your workload becomes excessive, we negotiate with clients to increase team size or distribute tasks.
●Consultation Opportunities: Our dedicated sales team and career advisors are always available to address your concerns.


【Why Join Us?】
◎ Earn up to ¥1,000,000 Salary Increase Upon Joining!
90% of our engineers join with a higher salary than their previous roles. We evaluate your skills and experience fairly and provide compensation that matches your value.

◎ Accelerated Career Growth
With semi-annual evaluations, promotions are based on clear and transparent criteria. We use a multi-faceted approach, incorporating client, self, and sales evaluations to ensure fairness. Experienced engineers have ample opportunities to quickly step into leadership roles.

◎ Project Selection System
We match projects to your experience, preferences, skills, and aspirations. This ensures you're working on the most suitable projects to efficiently advance your skills and career.

◎ 80% Remote Work Ratio
Flexible work arrangements allow you to focus deeply on your tasks while achieving an excellent work-life balance.


【Voices from Mid-Career Hires】
"I transitioned from a role focused on operations and maintenance to improve my coding skills. The company’s commitment to my career during the interview and post-offer project discussions convinced me to join."
"I saw opportunities for both personal growth and contributing to the establishment of an engineering organization, which motivated my decision."

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】
¥4,200,000–¥7,800,000
Monthly Salary: ¥350,000–¥650,000
(System Engineer, PL: ¥450,000+ / PM: ¥550,000+)
＊Determined based on previous salary, experience, skills, and age
＊Salary review: Twice a year + additional opportunities as needed
＊Includes fixed overtime pay for 20 hours; additional hours compensated separately


【Location Details】
■ Tokyo Headquarters or project sites
Tokyo Headquarters
7F, Imasu Hamada Building, 7-4-7 Nishi-Shinjuku, Shinjuku-ku, Tokyo

Project Sites
90% of projects are in central Tokyo:
Shinjuku, Shibuya, Ikebukuro, Ginza, Roppongi, Shinagawa, Shiodome, Odaiba, etc.

【Access】
Tokyo Headquarters
9-minute walk from JR and subway lines at Shinjuku Station
3-minute walk from Shinjuku-Nishiguchi Station (Toei Oedo Line)
7-minute walk from Seibu-Shinjuku Station (Seibu Shinjuku Line)

【Working Hours】
9:30 AM – 6:30 PM

【Benefits & Welfare】
－Position Allowance
－Marriage & Childbirth Allowance
－Overtime Allowance (paid for additional hours beyond fixed overtime)
－Commuting Allowance (up to ¥25,000/month)
－Full Social Insurance (Employment, Workers' Compensation, Health, Pension)
－Education & Training Support (external training programs / e-learning)
－Membership in Kanto IT Health Insurance Association
－Certification Support Program
－Library System
－Company Events (occasional, e.g., barbecues and year-end parties)
＜Ongoing In-House Study Groups＞
Engineer-led study sessions and internal curriculums available

【Holidays & Leave】
－Full two-day weekends (Saturday and Sunday)
－Public holidays, summer vacation
－Year-end/New Year holidays
－Paid leave
－Bereavement leave

RECRUITMENT PROCESS

1.Document screening
2.1st interview (hiring manager)
3.Final interview (division/officer interview)
We expect it to take about 2~3 weeks from the application screening to the informal offer.

Business (description what they do)

On-site service business Solution Business

Available Jobs in (FUSIONIA Inc.)

Recommended Jobs

CyberAgent, Inc.

[Media Division] Data Scientist / ABEMA

6M - ***M JPY | Tokyo

SQL Python R

G Talent

[Dev] Backend Engineer (LLM New Business)

6M - ***M JPY | Tokyo

Python Tech lead

RAKUS Co., Ltd.

[Bridge SE] Tokyo↔Vietnam/own product/top scale in Japan

5.5M - ***M JPY | Tokyo

Java Linux

MILIZE Inc.

Lead Engineer who can create innovative services in Fintech services

5M - ***M JPY | Tokyo

React TypeScript JavaScript