Platform Engineer

Job Overview

Platform Engineer - Mercari
Employment Status: Full-time
Work Hours: Full Flextime (no core time)
Office: Roppongi

About Mercari

Circulate all forms of value to unleash the potential in all people
\"What can I do to help society thrive with the finite resources we have?\" The Mercari marketplace app was born in 2013 out of this thought by our founder Shintaro Yamada as he traveled the world. We believe that by circulating all forms of value, not just physical things and money, we can create opportunities for anyone to realize their dreams and contribute to society and the people around them. Mercari aims to use technology to connect people all over the world and create a world where anyone can unleash their potential. For more information about Mercari Group’s mission, see Mercari’s Culture Doc

Organization/Team Mission

Mercari Engineering Principles are a shared understanding that serves as the foundation of engineering beliefs and behavior at Mercari. The Engineering Principles are designed to complement the organizational identity (Mercari’s mission, values, and culture) from an engineering viewpoint. These principles ultimately help us achieve Mercari’s mission by defining the ideal state we seek to realize in the long term.

Key Responsibilities

• Design of high-level architecture and creation/implementation/sharing of guidelines and best practices.


• Sharing, introduction support, and development of common mechanisms across the Mercari organization.


• Cycle of investigating technical issues, proposing solutions, implementing them, and supporting their introduction.


• Technical top-leading and bottom-up improvement of the organizational technical level.


• Development and deployment of services for internal developers.

Unique Challenges

Mercari adopts a microservice architecture, with over 400 microservices managed by more than 50 teams. You will be required to identify and solve architectural challenges that span these microservices. Since decisions have a wide-ranging impact, there is a challenge of meticulously analyzing various trade-offs. This requires a strong ability to balance meticulousness with a bias for action, as long cycles of investment. Your contributions will have a significant impact on the system and services, necessitating an approach that ensures architectural considerations proceed successfully and efficiently.

Required Qualifications

• Ability to empathize with the mission and values of the Mercari Group and each company.


• Experience in developing and operating in backend or infrastructure technology domains.


• Experience in designing data models using RDBMS and NoSQL.


• Experience using knowledge of network protocols such as TCP/IP and HTTP.


• Experience in discovering and resolving causes of technical problems (e.g., performance degradation) in systems.


• Experience in independently discovering technical problems and solving cross-organizational issues.

Preferred Experience/Skills

• Experience developing with Go.


• Experience developing in the cloud using GCP or AWS.


• Experience developing systems using container technologies such as Docker and Kubernetes.


• Experience in software development and operation based on microservice architecture.


• Experience designing secure systems based on authentication and authorization.


• Experience making technical decisions using DesignDoc and ADR.