A technology company that operates the Mercari marketplace app, focusing on circulating all forms of value to unleash potential in people.

Merpay, part of the Mercari Group, is seeking a QA Engineer to join their team in Tokyo. This role combines traditional QA practices with AI-driven testing solutions to ensure the highest quality of innovative products and services. The position offers unique challenges in a fast-paced fintech environment, working with cutting-edge technologies and AI-powered testing tools.

The ideal candidate will be responsible for comprehensive quality assurance across web, mobile, and backend systems, with a focus on implementing AI-driven testing solutions. You'll work in an agile environment using tools like GitHub, Playwright, BigQuery, and various AI assistance tools including Google Gemini and ChatGPT.

As a QA Engineer at Merpay, you'll be part of a small, dynamic team where you can take ownership and contribute proactively. The role offers significant opportunities for growth and innovation, especially in implementing AI-powered testing solutions and improving QA processes.

The position requires strong technical skills in software testing, experience with automation frameworks, and an understanding of AI applications in QA. You'll need to demonstrate excellent communication skills and be comfortable working in a bilingual environment (Japanese/English).

Key technologies and tools include:
- Testing frameworks: Jetpack Compose, XCUITest, Playwright
- Analytics tools: BigQuery, Looker, Datadog
- Project management: Jira, Confluence, TestRail
- AI tools: Google Gemini, Cursor, ChatGPT

This is an excellent opportunity for a QA professional looking to work at the intersection of fintech and AI, contributing to innovative payment solutions while advancing their career in a supportive, technology-driven environment.

QA Engineer position at Merpay, focusing on AI-driven testing solutions and quality assurance for fintech products, requiring 3+ years of experience and strong technical skills.

Software Engineer, QA - Merpay

A technology company operating a marketplace app that facilitates the circulation of value through C2C commerce.

Mercari is seeking a Corporate IT/Corporate Engineer specializing in IT Service Management to join their team in Tokyo. This role is part of the Corporate Engineering department, which operates under the mission of "Expanding Mercari's possibilities through technical capability and implementation power."

The IT Service Management (ITSM) team is responsible for managing and operating IT hardware and software used across the entire Mercari group. Their goal is to ensure all members can focus on their work comfortably and safely through daily support and operations. The team contributes to solving user issues and maintaining stable IT service operations.

This position offers unique challenges, including working in a rare environment that combines thousands of users with cloud and SaaS-native infrastructure. You'll have the opportunity to build and operate IT infrastructure that meets global standards and directly impact the company through IT service and asset management.

The role involves managing IT projects, overseeing the IT Service Desk team, handling escalated support issues, and managing budgets and contracts for hardware and software assets. You'll also support the engineering organization with AI/LLM tool management.

Mercari offers a flexible work environment with hybrid working options and no core hours. The company values diversity and inclusion, ensuring equal opportunities regardless of background. They're looking for someone who can embrace change and evolution, prioritize user experience, and balance idealism with practicality.

The position requires Japanese language proficiency and preferably English language skills, as you'll be working in a global environment with English-speaking colleagues. Experience with enterprise systems, IT support, and stakeholder management is essential for success in this role.

Corporate IT/Engineering role at Mercari focusing on IT Service Management, requiring 3+ years of experience and strong Japanese language skills.

Corporate IT/Corporate Engineer, IT Service Management

A marketplace app company focused on circulating all forms of value to unleash potential in people.

Mercari, a leading marketplace app company, is seeking a Software Engineer specializing in Cloud Networking to join their team in Tokyo. The role is part of the Networking Platform Team, which is crucial in making communication between customers and systems smooth, reliable, and secure. The team manages the entire network infrastructure from CDN to physical data centers, utilizing modern technologies like Kubernetes and Istio service mesh.

The ideal candidate will be working on cutting-edge projects including service mesh implementation, Kubernetes cluster migration, and building cloud networking foundations for global scaling. This position offers a unique opportunity to work with large-scale systems and impact both developers and end users through end-to-end ownership of networking solutions.

The company culture is built on strong engineering principles including Passion For The Product, Grow Together, Solve Through Mechanisms, and Collaborate Openly. Mercari offers a flexible work environment with full flextime and no core hours, based in their Roppongi office.

This role requires a strong background in networking fundamentals, cloud platforms (GCP/AWS), and modern infrastructure tools. The successful candidate will be involved in critical projects like implementing service mesh, managing Kubernetes clusters, and establishing robust networking foundations for global scale operations.

Working at Mercari means joining a company with a clear mission to "Circulate all forms of value to unleash the potential in all people." The company values diversity and inclusion, ensuring equal opportunities for all candidates regardless of their background.

Senior Cloud Networking Engineer role at Mercari, focusing on building and maintaining robust cloud infrastructure and networking solutions for a global marketplace platform.

Software Engineer, Cloud Networking

A Japanese marketplace app company that enables value circulation through their C2C platform, with over 23 million monthly users.

Mercari is seeking a Backend Product Engineer for their Mercoin team, focusing on cryptocurrency and blockchain services. The role involves developing and maintaining the core backend systems for cryptocurrency trading and user management functions. The team is responsible for building Bitcoin trading services that already serve over 3 million customers, making it a significant player in an industry with approximately 10 million users total.

The position offers unique challenges, including the opportunity to provide new cryptocurrency-related features to Mercari's 23 million monthly active users. The team leverages distinctive advantages such as integration with Mercari's payment system and a verified user base of over 14 million customers. Working in a flexible environment with modern technology stack including Go, GCP, and various cloud services, you'll collaborate with product managers and trading teams to directly impact product growth.

The role requires strong technical expertise in web application development, database design, and microservices architecture. You'll be working with cutting-edge technologies like Protocol Buffers, gRPC, and various GCP services. The ideal candidate should have experience with high-traffic systems and a passion for cryptocurrency/blockchain technology.

This is an excellent opportunity for engineers interested in being at the forefront of financial technology innovation, working on large-scale systems that have real impact on millions of users. The position offers flexible working arrangements and the chance to work with a modern tech stack in a company that values engineering excellence and innovation.

Backend Product Engineer position at Mercari's Mercoin division, focusing on cryptocurrency trading systems and blockchain technology using Go and modern cloud infrastructure.

Mercari Engineering Jobs

A technology company that operates the Mercari marketplace app, focusing on circulating all forms of value to unleash potential in people.