Job Board | Japanese recruitment agency

【Urgent】Senior Backend Engineer(Platform) - AI-driven data platform

Permanent

Full-time

案件ID:

63427

公開日:

2025-07-11

概要

Build the core platform that powers a global industry revolution.

■ Job Title

Senior Software Engineer, Backend - Platform Development (Fluent English Required)

■ Company Overview

They are a fast-growing global tech company dedicated to transforming the manufacturing industry through their advanced AI-powered data platform. With a strong presence in Japan and expanding operations in the US and ASEAN, they are building a multicultural, English-first engineering team to drive our global mission.

■ Your Role and Responsibilities

(Upon Employment)You will join the Platform Team responsible for a workflow engine that handles heavy, asynchronous workloads like data conversion and ML-based analysis. Your role will involve designing and implementing this core platform, evaluating middleware, architecting systems, and tuning for cost and performance using technologies like Kubernetes, Rust, and TypeScript.

(Scope of any potential changes) Duties as defined by the company

■ Experience and Qualifications

7+ years of backend development experience for web applications.

Experience leading technology selection and architecture design for an entire service.

Hands-on experience with statically typed languages (e.g., Rust, Java, Go).

Experience operating services with Kubernetes and container technologies like Docker.

Experience designing, developing, and operating microservices and large-scale systems.

Development experience using public cloud platforms (AWS, Google Cloud, etc.).

Business-level English proficiency for team communication.

■ Additional Preferred Qualifications

Conversational Japanese proficiency.

Hands-on experience with Rust.

Experience developing secure web applications.

Experience in two or more programming languages.

Fundamental knowledge of data structures and algorithms.

Experience building and operating monitoring infrastructure (e.g., Datadog).

■ Good Reasons to Join

Take ownership of a critical platform that underpins our core services and business growth.

Work with a modern tech stack including Kubernetes, Rust, and Google Cloud.

Join a diverse, English-speaking team at the forefront of global expansion.

Benefit from a competitive salary, stock options, and comprehensive support for personal and professional growth.

Enjoy a flexible hybrid work environment with excellent benefits for family and well-being.

■ Work Location

(Upon Employment) Tokyo
(Scope of change) Location as specified by the company

■ Salary

Annual Salary: ¥8,000,000 - ¥11,000,000. Your salary will be reviewed twice a year and paid in 12 monthly installments. A stock option program is also available.

Details will be provided during the meeting.

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【Urgent】Senior Fullstack Engineer - AI-driven data platform

Permanent

Full-time

案件ID:

63426

公開日:

2025-07-11

概要

Lead the revolution with a cutting-edge, AI-driven data platform.

■ Job Title

Senior Software Engineer, Backend / Full-stack (English Speaking)

■ Company Overview

They are a fast-growing global tech company dedicated to transforming the manufacturing industry through their advanced AI-powered data platform. With a strong presence in Japan and expanding operations in the US and ASEAN, they are building a multicultural, English-first engineering team to drive their global mission.

■ Your Role and Responsibilities

(Upon Employment)You will take a leading role in the end-to-end development of new applications on their core platform. This includes everything from technology selection and architectural design to final delivery. You will work closely with product managers and designers, and be a key player in shaping their high-performing, global engineering organization.

(Scope of any potential changes) Duties as defined by the company

■ Experience and Qualifications

Over 7 years of experience building web applications on major cloud platforms (GCP, AWS, Azure).

Proven experience leading web application development projects with a team of five or more members.

Fluent English communication skills suitable for a global team environment.

Demonstrated technical leadership in areas like architecture design and core feature development.

Strong sense of proactivity and ownership, with the ability to manage development priorities and guide fellow engineers.

■ Additional Preferred Qualifications

Experience in a Docker-native development environment.

Backend development experience using statically typed languages.

Full-stack development experience, ideally with React.js.

Experience designing and building microservices architecture and asynchronous job systems.

Familiarity with Domain-Driven Design (DDD) in complex business contexts.

Proven ability to enhance development productivity through CI/CD and establishing coding standards.

■ Good Reasons to Join

Play a central role in a rapidly scaling global company that is reshaping an entire industry.

Lead the development of new products and contribute to building a world-class, English-speaking engineering culture.

Benefit from a competitive compensation package, including a stock option program.

Enjoy a flexible, hybrid work style with flextime and excellent work-life balance support.

Receive generous support for learning, development, family, and team-building activities.

■ Work Location

(Upon Employment) Tokyo
(Scope of change) Location as specified by the company

■ Salary

Annual Salary: ¥8,000,000 - ¥11,000,000. Your salary will be reviewed twice a year and paid in 12 monthly installments. A stock option program is also available.

Details will be provided during the meeting.

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【N3 Japanese】Senior backend engineer(Ruby) - for people living in Japan

Tokyo

Permanent

Full-time

案件ID:

63425

公開日:

2025-07-11

概要

Join a leading payment solutions provider and help ensure the quality and reliability of our global payment systems.

N3 Japanese needed.

■ Job Title

Senior Backend Engineer

■ Company Overview

We are a premier provider of cross-border payment solutions in Japan.
Our platform supports thousands of global merchants through developer-centric APIs and seamless integration with major e-commerce platforms.

■ Your Role and Responsibilities

As a backend engineer, you’ll work on core systems that handle global payments. You’ll be responsible for building and maintaining robust, high-performance APIs and services, primarily using Ruby and Ruby on Rails.

This is a product-focused engineering role in a collaborative and inclusive environment where engineers influence both product and technical decisions. You’ll be expected to lead technical projects, mentor team members, and improve the reliability and maintainability of the platform.

While the role is backend-centric, occasional frontend tasks may be required as the team continues to grow.

Key Responsibilities:

Develop and maintain backend systems using Ruby on Rails

Collaborate with product managers to translate requirements into working features

Lead large technical initiatives, from planning and architecture to implementation

Conduct code reviews and participate in architectural discussions

Ensure software quality through testing, monitoring, and continuous improvement

Identify and execute meaningful refactoring and system improvement efforts

■ Experience and Qualifications

Proven experience building scalable and high-performance web APIs

Deep understanding of database design, optimization, and access patterns

Ability to architect systems across multiple data sources (including OLAP/OLTP)

Familiarity with observability practices such as monitoring, logging, and tracing

Strong communication skills with an ability to clearly document designs and decisions

Experience integrating with third-party APIs securely and reliably

Knowledge of common web vulnerabilities and secure coding practices

Strong foundation in software architecture, design patterns, and engineering best practices

■ Additional Preferred Qualifications

Experience with modern frontend frameworks (TypeScript, Vue.js, or React)

Background in payment systems or fintech

Business-level spoken Japanese

Contributions to open-source projects or tech communities

■ Good Reasons to Join

Flexible work arrangements, including remote and in-office options.

Attractive paid leave policies, including summer, winter, and birthday holidays.

Dedicated budget for self-learning and professional development.

Support for Japanese language learning.

■ Work Location

(Upon Employment) Tokyo
(Scope of change) Location as specified by the company
Both remote work and office work are possible.

■ Salary

To be decided based on your experience, skill set, and company policies.
Details will be shared during the interview process.

Details will be provided during the meeting.

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【Require English】Senior SRE - for people living in Japan

Tokyo

Permanent

Full-time

案件ID:

63424

公開日:

2025-07-11

概要

Join a leading payment solutions provider and help ensure the quality and reliability of our global payment systems.

■ Job Title

Senior SRE

■ Company Overview

We are a premier provider of cross-border payment solutions in Japan.
Our platform supports thousands of global merchants through developer-centric APIs and seamless integration with major e-commerce platforms.

■ Your Role and Responsibilities

As an SRE, you’ll operate at the intersection of software engineering and infrastructure, taking ownership of platform stability, performance, and developer enablement.
This role goes beyond traditional infrastructure management—your contributions will shape a resilient, observable, and efficient platform that empowers internal teams and external users.

Key areas of responsibility include:

Cloud Infrastructure: Design, deploy, and maintain secure, scalable, and highly available infrastructure in a cloud-native environment using tools like Terraform.

CI/CD & Automation: Build and enhance CI/CD pipelines to ensure safe, fast, and reliable deployments.

Observability: Develop and manage systems for logging, monitoring, metrics, tracing, and alerting, enabling real-time visibility and rapid incident resolution.

Platform Reliability: Advocate for and implement reliability best practices across all engineering teams.

Collaboration: Work closely with engineers, security teams, and product stakeholders to meet both technical and business objectives.

■ Experience and Qualifications

2+ years of experience in SRE or infrastructure roles using AWS.

2+ years of experience in software development.

Proficiency with observability tools (ideally Datadog).

Hands-on experience with infrastructure as code, especially Terraform.

Programming or scripting ability in at least one language (e.g., Ruby, Python, Go, Shell).

Familiarity with CI/CD platforms such as GitHub Actions, Jenkins, or CircleCI.

■ Additional Preferred Qualifications

Effective communication skills for cross-functional and external collaboration.

Understanding of networking protocols (e.g., TCP/IP).

Experience with AWS Direct Connect or hybrid networking.

Background in building secure and compliant infrastructure.

■ Good Reasons to Join

Flexible work arrangements, including remote and in-office options.

Attractive paid leave policies, including summer, winter, and birthday holidays.

Dedicated budget for self-learning and professional development.

Support for Japanese language learning.

■ Work Location

(Upon Employment) Tokyo
(Scope of change) Location as specified by the company
Both remote work and office work are possible.

■ Salary

To be decided based on your experience, skill set, and company policies.
Details will be shared during the interview process.

Details will be provided during the meeting.

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【Require English】QA engineer (automation + manual) - for people living in Japan

Tokyo

Permanent

Full-time

案件ID:

63423

公開日:

2025-07-11

概要

Join a leading payment solutions provider and help ensure the quality and reliability of our global payment systems.

■ Job Title

QA engineer (automation + manual)

■ Company Overview

We are a premier provider of cross-border payment solutions in Japan.
Our platform supports thousands of global merchants through developer-centric APIs and seamless integration with major e-commerce platforms.

■ Your Role and Responsibilities

As a vital member of our expanding QA team, you will be responsible for both automated and manual testing to ensure the stability and performance of our payment infrastructure.
This hybrid position includes designing and maintaining test frameworks, executing diverse testing strategies, identifying and troubleshooting issues, and supporting CI/CD pipelines.
You will work closely with engineers and product managers to define and maintain quality standards throughout the entire development lifecycle.

■ Experience and Qualifications

2–5 years of hands-on experience in software testing, automation, or development.

Proficiency in at least one programming language such as TypeScript, JavaScript, Python, or Ruby.

Practical experience with automation tools like Playwright, Selenium, etc.

Solid understanding of testing techniques (unit, integration, end-to-end).

Proven ability to write and execute both automated and manual test plans.

Familiarity with CI/CD tools and integrating test automation.

Ability to work independently in dynamic environments with a proactive mindset.

Strong communication and debugging skills.

■ Additional Preferred Qualifications

Experience testing multilingual applications or mobile apps.

Familiarity with cloud platforms (e.g., AWS), observability tools (e.g., Datadog), or performance testing frameworks.

Exposure to backend services, APIs, or system infrastructure.

Background in agile development or fast-paced startup settings.

Contributions to open-source initiatives.

■ Good Reasons to Join

Flexible work arrangements, including remote and in-office options.

Attractive paid leave policies, including summer, winter, and birthday holidays.

Dedicated budget for self-learning and professional development.

Support for Japanese language learning.

■ Work Location

(Upon Employment) Tokyo
(Scope of change) Location as specified by the company
Both remote work and office work are possible.

■ Salary

To be decided based on your experience, skill set, and company policies.
Details will be shared during the interview process.

Details will be provided during the meeting.

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《SDET~Software Development Engineer in Test》リモート主体！グローバルな決済システムの品質を支えるQAチームの中核メンバーとしてご活躍しませんか？(KT)

Tokyo

Permanent

Full-time

案件ID:

63422

公開日:

2025-07-11

概要

Senior Site Reliability Engineer Description

About KOMOJU

KOMOJU (by Degica) is the leading cross-border payment gateway for Japan. We power payments for companies like video game

distribution platform Steam and the popular mobile app TikTok. Today we help thousands of merchants by providing them with the

payment infrastructure they need through developer-friendly API’s to integrations on popular platforms like Shopify and Wix; we

help our merchants grow in all markets they are expanding.

About the position

As a Site Reliability Engineer (SRE) at Degica, you will play a critical role at the intersection of software engineering and

infrastructure operations. This position is ideal for engineers who are passionate about automation, systems design, and building

scalable, reliable platforms.

In this role, you won’t be limited to just managing cloud infrastructure—you will take ownership of the platform's overall health,

performance, and developer experience. Your work will span:

● Cloud Infrastructure Management: Architect, implement, and maintain robust and secure infrastructure in a cloud-native

environment using Terraform. You'll ensure high availability, scalability, and resilience of our systems.

● CI/CD and Deployment Automation: Design and improve continuous integration and continuous delivery pipelines that

empower development teams to ship software reliably and rapidly.

● Observability & Monitoring: Implement end-to-end observability tooling—including metrics, logging, distributed tracing, and

alerting—to provide real-time insight into platform performance and help reduce mean time to detection and resolution.

● Platform Quality & Reliability: Champion best practices for reliability, scalability, and performance across engineering teams.

You’ll collaborate closely with developers, security engineers, and product stakeholders to ensure our systems meet both technical

and business goals.

Responsibilities

● Actively participate in improving and maintaining our AWS infrastructure

● Continuously improving the system performance, reliability and security

● Design, implement, and maintain our observability stack (metrics, logging, tracing, dashboards).

● Correspond with engineering teams to instrument applications for better observability.

● Improving developer productivity with tooling

● Securing the system and adhere to compliance

● Be part of the teams on-call rotation

Requirements

● 2+ years in SRE roles working with the AWS platform.

● 2+ years experience in a software development role

● Hands-on experience with observability tools, preferably Datadog.

● Proficiency in Terraform.

● Proficiency in at least one scripting or programming language (Ruby/Rails, Python, Go, Shell Script, etc.).

● Experience on working with CI/CD tools such as GitHub Actions, Jenkins, Circle CI, etc.

Nice to have

● Strong communication skills to work closely with outside companies and various departments inside the organization

● Knowledge of TCP/IP and other networking protocols

● Experience with AWS Direct connect

Benefits

● At Degica, we embrace remote work while also offering office space for those who prefer in-person collaboration

● 10 days regular vacation, additional 5 days summer and 5 days winter vacation

● Paid birthday holiday

● Budget for self-learning allowance, to ensure our employees’ skills remain current

● Language training for Japanese

● On-call duties come with an allowance.

Senior Site Reliability Engineer
- Description
  - About KOMOJU
  - About the position
  - Responsibilities
- Requirements
  - Nice to have
- Benefits

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《Software Development Engineer in Test (SDET)》English only is OK！Join a leading payment solutions provider and play a key role in ensuring the quality of our global payment systems.(KT)

Tokyo

Permanent

Full-time

案件ID:

63421