Software Engineer – Mercari


Job Description

We are looking for people that are interested in our services, mission, and values, and want to work where engineers can go bold, use the latest technology, make autonomous decisions, and take on challenges at a rapid pace.


  • In order to break down the barriers that typically divide people in software development, we refer to everyone as software engineers. As a company, we believe all software engineers should use the most appropriate technology available, so we don’t limit people to particular roles or technology. This does not mean that we don’t believe in specialization, but we think that someone’s work should not be limited by their job title.

  • Engineering Culture

  • Technology Stack


Required Experience

  • Developing, operating, making decisions when selecting technology, and continuous improvement of large-scale product codebases

  • At least 3 years of experience in at least one of the following technical area:

    • Backend: Design, development, and operation of APIs using Go, PHP, or Java

    • Frontend: Development related to frontend fields such as web browsers, JavaScript, TypeScript, React.js, Next.js, or Redux

    • Mobile: Development using Swift or Kotlin

    • Machine Learning: ML modeling or development experience with ML systems

  • Ability to design and develop with performance and scalability in mind

  • Extensive knowledge of object-oriented software development, networking, memory management, and software testing

  • Good communication and interpersonal skills with the ability to collaborate with multiple stakeholders

Preferred Experience

  • Project management and/or team leadership

  • Development and operation in a microservices architecture

  • Knowledge of and experience with database (RDBMS, NoSQL), network, Linux server, surveillance system, logging, SLA, SLO, and system operation

  • Cloud development experience (preferably GCP or AWS)

  • Understanding of UI development

  • OSS contribution experience / familiarity with the OSS community

Screening Criteria

Language Requirements

  • English: Business level

  • Japanese: Conversational (optional)

About Mercari

Mercari is a Japan-based company with the mission of “creating 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?