Current Job Listings

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listings
Seirai Technologies Inc.
Recruiter ★ ★ Staff Level
(Company is not publicly visible)

E-Commerce Marketplace Development Department: Backend Engineer

Recruiter
Seirai Technologies Inc.
Location

Asia Japan Tokyo Setagaya

Salary

JPY - Japanese Yen JPY 5500K - JPY 7000K

Job Description

[Recruitment Background]
Our service is growing steadily, and to drive further growth, we need a more robust and scalable system. We are also committed to providing the best possible user experience. To achieve this, we need a stronger team and advanced engineering skills, so we are looking for a backend engineer to work with us as part of our development team.

[Job Description]
- Provide a complete system from requirements definition, design, coding, testing, and deployment.
- Collaborate with PDM, internal members, and upstream and downstream sys ...

Seirai Technologies Inc.
Recruiter ★ ★ ★ ★ Manager Level HIGH CLASS
(Company is not publicly visible)

E-Commerce Marketplace Development Department: Project Manager

Recruiter
Seirai Technologies Inc.
Location

Asia Japan Tokyo Setagaya

Salary

JPY - Japanese Yen JPY 7000K - JPY 10000K

Japanese Level
Daily Conversation Level
Job Description

We operate a wide variety of services, and that number is growing daily. As privacy regulations become increasingly complex, we are seeking a challenging individual to lead privacy compliance.

[Job Description]
- Respond to inquiries from the business side regarding privacy-conscious service development.
- Formulate internal rules to improve the level of privacy protection.
- Host internal seminars on privacy protection.
- Advise on handling customer inquiries regarding privacy and media interviews.
- Respond to incidents that could potentially v ...

Seirai Technologies Inc.
Recruiter ★ ★ Staff Level
(Company is not publicly visible)

Front-end Engineer @XI/MI・Tech Unit

Recruiter
Seirai Technologies Inc.
Location

Asia Japan Tokyo Shibuya

Salary

JPY - Japanese Yen JPY 5000K - JPY 7000K

Japanese Level
None
Job Description

[Recruitment Background]
We are planning to expand our team to further develop our products. We are looking for talented, passionate engineers to join us.
[Job Description]

● To realize various services on the Alchemista Platform, you will play a leading role in determining the project's direction, discussing detailed specifications with development leaders and PMs.
● Creating highly maintainable code
● Developing and maintaining secure AI products (Alchemista)
● Integrating with backend API services
● Implementing front-end UI

[Dev ...

Seirai Technologies Inc.
Recruiter ★ ★ ★ ★ Manager Level HIGH CLASS
(Company is not publicly visible)

E-Commerce Marketplace Development Department, Product Management Division: Senior Product Manager

Recruiter
Seirai Technologies Inc.
Location

Asia Japan Tokyo Setagaya

Salary

JPY - Japanese Yen JPY 8000K - JPY 11000K

Japanese Level
Business Level(JLPT Level 2 or N2)
Job Description

[Recruitment Background]
As a Senior Product Manager, we require the following:
- Leadership to lead product improvements
- The ability to act in the present with a long-term plan in mind, without being caught up in short-term considerations
- The ability to see things from the user's perspective
- The ability to see the essence of things
- Communication skills to coordinate with multiple stakeholders
We are looking for someone with a passion for vigorously improving our services.

[Job Description]
- Discuss project proposals from business div ...

Seirai Technologies Inc.
Recruiter ★ ★ Staff Level
(Company is not publicly visible)

E-Commerce Marketplace Development Department: Front-end Developer

Recruiter
Seirai Technologies Inc.
Location

Asia Japan Tokyo Setagaya

Salary

JPY - Japanese Yen JPY 5000K - JPY 7500K

Japanese Level
None
Job Description

[Recruitment Background]
Our service is growing steadily, and to drive further growth, we need a more robust and scalable system. We are also committed to providing the best possible user experience. To this end, we need a stronger team and advanced engineering skills, so we are looking for a front-end engineer to join our development team.

[Job Description]
- System delivery from requirements definition, design, coding, testing, to deployment
- Collaborate with PDM, internal members, and upstream and downstream system teams
- System stability, pe ...

Seirai Technologies Inc.
Recruiter ★ ★ Staff Level
(Company is not publicly visible)

Software Engineer |English Ok | Minato Tokyo

Recruiter
Seirai Technologies Inc.
Location

Asia Japan Tokyo Minato

Salary

JPY - Japanese Yen JPY 6500K - JPY 9000K

Japanese Level
Business Level(JLPT Level 2 or N2)
Job Description

You will be responsible for addressing the complex issues in the research field and advancing various developments through LBase's services. Our engineers are not limited to specific technologies but are expected to leverage the most appropriate technologies to tackle challenges.

Building systems from a single service and platform perspective
Understand the characteristics of the business and write code
Quickly create products from hypotheses and drive PoC
Make reasonable design proposals based on the project situation, and make decisions from a te ...

Seirai Technologies Inc.
Recruiter ★ ★ ★ Senior Level
(Company is not publicly visible)

Front-end engineer

Recruiter
Seirai Technologies Inc.
Location

Asia Japan Tokyo Shibuya

Salary

JPY - Japanese Yen JPY 5000K - JPY 6000K

Japanese Level
Business Level(JLPT Level 2 or N2)
Job Description

[Recruitment Background]
GL is aiming to transform into an organization that provides contract product teams and is in a phase of accelerating business growth. We are looking for a front-end engineer who can directly commit to building clients' businesses and lead the infrastructure design and implementation of React + Next.js development.

[Job Description]
・Design and implementation of the React + Next.js development infrastructure
・Design and implementation of the entire web application
・Design the entire application based on data flow
...

Seirai Technologies Inc.
Recruiter ★ ★ ★ Senior Level
(Company is not publicly visible)

Senior/Lead Front-end Engineer | English Speaking | Minato Ward

Recruiter
Seirai Technologies Inc.
Location

Asia Japan Tokyo Minato

Salary

JPY - Japanese Yen JPY 8500K - JPY 12000K

Japanese Level
Business Level(JLPT Level 2 or N2)
Job Description

[Job Description]
- Lead front-end architecture design and technology selection (state management, component design, test strategy development)
- Promote standardization of coding conventions, design system integration, and review culture
- Establish CI/CD (GitHub Actions) and E2E test environment
- Define requirements and specifications in collaboration with PdM and designers
- Lead design and implementation using React/Next.js
- Performance tuning based on Core Web Vitals, etc.
- Organize and train front-end team members

[Development Environm ...

Seirai Technologies Inc.
Recruiter ★ ★ Staff Level
(Company is not publicly visible)

Front-end engineer (React/Vue.js/Next.js) | Shibuya

Recruiter
Seirai Technologies Inc.
Location

Asia Japan Tokyo Shibuya

Salary

JPY - Japanese Yen JPY 4000K - JPY 7000K

Job Description


[Recruitment Background]
As our business expands, we are seeking a front-end engineer to develop web applications for our client companies.

[Job Description]
- UI/UX design, screen design
- Front-end development using HTML/CSS/JavaScript (React, Vue.js, etc.)
- Consistent development work from requirements definition to maintenance and operation
- Client negotiation and direction

[Development Environment]
- Languages: JavaScript, TypeScript
- Frameworks: React, Vue.js, Next.js, Nuxt.js
- Environment: Node.js
- Tools: Claude, VS Code
- D ...

Seirai Technologies Inc.
Recruiter ★ ★ ★ Senior Level
(Company is not publicly visible)

Web GIS Application Development Engineer | English Speaking | Koto Ward

Recruiter
Seirai Technologies Inc.
Location

Asia Japan Tokyo Koto

Salary

JPY - Japanese Yen JPY 8000K - JPY 11000K

Job Description

[Recruitment Background]
We are looking for someone to develop web GIS applications in order to strengthen our product development using satellite data and geospatial information.

[Job Description]
・Web GIS application design and development
・Creating and converting distribution data for Web GIS
・Developing business proof-of-concept (PoC) projects using satellite data and geospatial information

[Development Environment]
・Languages: TypeScript, Python (and Rust)
・Frameworks: React, MapLibre GL JS
・Infrastructure: AWS, Terraform
...

Seirai Technologies Inc.
Recruiter ★ ★ Staff Level
(Company is not publicly visible)

Front-end engineer | Full remote work OK | Nationwide

Recruiter
Seirai Technologies Inc.
Location

Asia Japan Tokyo

Salary

JPY - Japanese Yen JPY 8000K - JPY 11000K

Japanese Level
Business Level(JLPT Level 2 or N2)
Job Description

[Recruitment Background]
We are currently expanding our business as a healthcare company that combines AI and movement instruction. We are seeking an employee to strengthen our development structure for multiple SaaS products for the nursing care, sports, and fitness industries.

[Job Description]
- Mobile and web front-end requirements definition, design, development, and operation
- Planning and implementation of new architectures, tools, and libraries to improve development efficiency
- Maintenance and improvement of development environments suc ...

Seirai Technologies Inc.
Recruiter ★ ★ Staff Level
(Company is not publicly visible)

Data analyst | New Business UNIT | Entertainment & Creative

Recruiter
Seirai Technologies Inc.
Location

Asia Japan Tokyo Shibuya

Salary

JPY - Japanese Yen JPY 6000K - JPY 8500K

Japanese Level
Business Level(JLPT Level 2 or N2)
Job Description

Job Overview
[Business Development and Future Prospects Centered on "Communication"]
Our company's business domain is "communication," and we operate a variety of businesses both online and offline. As the evolution of AI increases free-time, communication will become even more important as a way to spend peaceful and fulfilling time. Leveraging our knowledge and technical capabilities accumulated over more than 25 years, we will continue to take on various challenges in the new era.

■Recruitment Background
As we move forward with AI-based data m ...

Seirai Technologies Inc.
Recruiter ★ ★ Staff Level
(Company is not publicly visible)

QA Engineer | Remote Available | Modern Office Shibuya

Recruiter
Seirai Technologies Inc.
Location

Asia Japan Tokyo Shibuya

Salary

JPY - Japanese Yen JPY 6000K - JPY 9000K

Japanese Level
Business Level(JLPT Level 2 or N2)
Job Description

Job Details
Specific duties include:
- As a member of the Scrum development team, provide input and incorporate quality considerations from the specification drafting stage.
- Create test cases and test plans and manage tester resources.
- Maintain specification/requirement documents and test cases.
- Verify bug reproduction and create reports.
- Propose improvements to product issues.
- Maintain and promote automated testing (MagicPod).

[Experience Gained]
Mitene currently has three QA engineers.
Quality is maintained through unit tests impl ...

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