Software Engineer, Web Platform

Tokyo, Japan

Mercari

Advanced relocation package

Adaptation tips

Flight ticket

Temporary housing

Visa Services

Rental deposit coverage

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.

Mercari Dev Meetups

Position

Remote work is also possible.

Mercari’s culture has been central to the company since our founding, with the three core values of Go Bold, All for One, and Be a Pro. In addition, the “Trust & Openness” value was introduced to embody our culture of mutual trust, where information remains transparent and rules are kept to a minimum. Regardless of how big Mercari gets, the culture will remain essential to achieving our mission and is evidenced throughout our organization.

Work Responsibilities

At Mercari, engineering teams always strive to continuously produce significant results. To do this, our organization constantly welcomes changes and new challenges, cooperates and co-creates, is diverse, offers freedom, and encourages everyone to take ownership and make our own decisions. We want to continue taking on new challenges, working together as one team, going bold, and taking ownership so that we can grow individually, while working toward the realization of Mercari’s mission

Bold Challenges

Improving the stability and performance of Mercari’s web app
Developing authentication/authorization and session management systems for our web app
Building and operating a common platform for our web app (web gateway, automation CI/CD, monitoring, etc.)
Detecting and monitoring system failures, as well as setting and monitoring SLOs for our web app
Collaborating with other teams in the design and development of our web app

Your qualification

Shared belief in Mercari’s mission and values
Experience developing and operating products using Go or Typescript
Experience developing and operating web applications or APIs in any programming language
Design and development skills for performance and scalability
Experience operating and monitoring web applications, as well as utilizing/building related tools
Extensive knowledge of object-oriented software development, networks, memory management, and software testing

Will be a plus

Experience with project management and/or team leadership
Experience building and operating web network gateways such as CDN, WAF, and L7 Software Load Balancer (especially Nginx Proxy, etc.)
Knowledge of and experience with web authentication methods such as OAuth 2.0, OpenID Connect, Single Sign On, WebAuthn, etc.
Knowledge of and experience with protocols such as HTTP and gRPC, as well as authentication specifications for web such as Cookie and JWT
Experience developing and operating systems using microservice architecture
Experience using Docker and Kubernetes
Experience building and operating a monitoring environment and SLO, as well as detecting and handling system failures for web applications
Experience with software development in the cloud (especially GCP or AWS)
Frontend development experience using JavaScript, Typescript, React, etc.
Experience contributing to an open-source project

Screening Criteria

Has a strong understanding of the company’s mission and values
Capable of taking initiative to lead the team to success
Possesses a strong sense of responsibility and works hard to achieve their goals
Capable of communicating proactively and producing high-quality output as part of a multicultural team
Capable of working independently, gathering technical information related to unknown issues in order to solve them
Likes web-related technologies, and wants to actively work in this area
*For details, please see this page

Language Requirements

English: Conversational
English or Japanese: Business level

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 Location

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

Scheduled working hours: 10 AM – 7 PM
Currently, due to COVID-19 pandemic, we have introduced a full-flex system without core time to increase the choice of working hours and allow for more flexible working styles (*does not apply to all positions)

Holidays