Software Engineer, Platform Engineering

📍 Tokyo, Japan or 🌎 Remote

🏢 Mercari

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About Mercari

We believe the world needs a place where people can exchange their loved goods. That’s why we built Mercari—to connect people who want to buy and sell things of emotional value through their mobile phones. Mercari has grown to become a leading community-powered marketplace that brings together millions of people every day.

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Position

Our Mission

Mercari is a Japan-based company with the mission of “create value in a global marketplace where anyone can buy & sell.” Having continuously worked toward this goal since our founding in 2013, we are now transforming from a startup into a global player. While this transformation brings its own specific set of challenges, we believe that solving them one after another will allow us to fully achieve our mission. Are you interested in working together to take on these exciting challenges?

Our Culture

To achieve our mission at Mercari, our organization and each of our employees share the same values and perspectives. Our individual guidelines for action are defined by our three values: Go Bold, All for One, and Be a Pro. Our organization is also shaped by our four foundations: Sustainability, Diversity & Inclusion, Trust & Openness, and Well-being for Performance. Regardless of how big Mercari gets, the culture will remain essential to achieving our mission and something we want to preserve throughout our organization.

We invite you to read the “Mercari Culture Doc,” which summarizes the behaviors and mindset shared by Mercari and its employees. We continue to build an environment where all of our members of diverse backgrounds are accepted and recognized, and where they can thrive while holding dear Mercari’s culture.

Position Overview

Team

The Platform Group is responsible for helping engineers at Mercari and its subsidiaries to build and deliver better products to our customers. We provide infrastructure and DevOps toolchains to increase the reliability of the service and make the work of engineers easier.

Currently, the Platform Group consists of four teams:

Platform DX: Working on improving the developers experience by providing better abstraction and automated workflows
CI/CD: Providing testing infrastructure, toolings, and the delivery system to make service delivery faster and more reliable
Network: Responsible for end-to-end network infrastructure from the edge (CDN) to the cloud & service mesh (Istio) and physical data centers
Platform Infra: Working on the base infrastructure operations as the cloud (GCP & AWS) and Kubernetes admin, as well as building the observability platform

You can see more details about the team structure on our tech blog How we reorganize the platform team.

Recent or in-progress projects

The following are some of the recent or in-progress projects which the Platform Group has been working on:

Role

We are looking for a software engineer for one of the teams in the Platform Group who has a strong background (or interest) in platform or infrastructure system development. Someone who is passionate about increasing developer productivity and has a pragmatic ability to release and migrate features to large-scale systems gradually.

What you will do

Design, develop, and maintain platform features and toolings which support the entire software development cycle from build to test through to deploy and operate
Support migration and adoptions of new platform features and toolings
Improve platform security and reliability with the SRE and Security teams
Improve and automate daily platform operations and reduce toils
Communicate with internal developers to understand their needs

You may be a fit if you

Are passionate about improving developer productivity and experience
Are passionate about infrastructure automation and building toolings
Are neutral on the technology itself and can take pragmatic approaches to the issues
Enjoy advocating for the new tooling and systems, and supporting to use it
Avoid reinventing the wheel and utilize the existing tooling and ecosystem as much as possible

Bold Challenges

Since the platform and its toolings are used by not only Mercari JP but also Merpay and Mercari US, the changes and improvements can affect the whole organization’s performance from development agility to system reliability. As a software engineer of the team, your implementation can have a truly significant impact.

The team needs to understand what the developers are struggling with and what is required for the Mercari Group’s product development. With this empathy and collection of requirements, the team prioritizes the problems to solve and decides the solution for them. You can join this decision-making process and propose a pragmatic solution leveraging your knowledge and experience.

Your qualification

Common

Shared understanding and belief in our company’s mission and values
Experience in infrastructure and system architecture design
Experience in infrastructure management and automation
Experience in writing design docs or proposals and reaching agreements with stakeholders
Experience in using container management platforms (ex: Kubernetes) in production
Experience in operating and being the admin of cloud (GCP or AWS) in production
Good understanding of common software development lifecycle (SDLC)

Platform DX team-specific requirements

2 years of experience using Go
Experience in writing CLI tools and packages in Go

Network team-specific requirements

Experience working with network proxies such as Envoy/HAProxy/Nginx
Strong understanding of networking, especially OSI Layer 4 to 7: load balancers, proxies, API gateways, DNS, TLS, and HTTP protocol
Good understanding of Linux networking
Working knowledge of cloud and Kubernetes networking

Will be a plus

Common

Experience in a distributed system or microservices architecture
Experience developing and supporting tools for internal customers
Experience making technical decisions as a tech lead
Experience of working as an SRE
Experience writing Go (and scripting with bash)

Platform DX team-specific preferred experience

Experience in frontend development with React
Experience in interface and UI/UX design

Network team-specific preferred experience

Experience in using service meshes in production such as Istio or Linkerd
Experience in using network reliability practices such as circuit breaking, rate limiting
Experience in designing cloud-based network architectures

Language Requirements

English: Proficient (CEFR - C1)
Japanese: Basic (CEFR - A2) optional
*Click here for more information about CEFR

Related Articles

What we offer

Employment Status

Full-time

Probationary period: First 3 months after joining the company (During this period your contract conditions will be the same as that of a permanent employee)

Office

Roppongi

Smoking is prohibited within our offices
Mercari has introduced a work style policy called “Your Choice.” Each member is free to choose whether they want to work in the office or work fully remote.
*Exceptions made for certain kinds of work

Work Hours

Full flextime (no core time)
*Does not apply to all positions

Holidays

Two days off per week (as well as national holidays, New Year's break, etc.)
Paid leave, congratulatory and bereavement leave, relax days, sick leave

Salary

Annual salary paid in 12 monthly installments (including fixed overtime allowance)
Based on skills, experience, and abilities
Reviewed twice a year

Benefits

Complete health and social insurance
Incentive program
Support systems, including those that benefit employee family members
*See this page for details

Support

Relocation Support
Language learning support
Translation/interpretation support
*See this page for details

Additional details

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