Software Engineer, Backend (US App)

Tokyo, Japan · Engineering · EN/JP


At Mercari, our mission is to create value in a global marketplace where anyone can buy & sell, and we pride ourselves in taking on a challenge. We are looking for new members to join us in achieving this goal under our values - Go Bold, All for One, and Be Professional.

We first launched in Japan in 2013 and quickly rose to be the #1 shopping app. After success in Japan, we opened our first U.S. office in 2014 and more recently expanded into the U.K. With 35 million downloads in the US, and over 100 million worldwide.

Every single day, 100 thousand new listings are posted and we are seeking a Senior Backend Software Engineer to join our growing Tokyo team. Also, Tokyo team coordinates with U.S. teams in U.S. offices for development. The ideal candidate is eager to take on increasing responsibilities, is dynamic and detail oriented, and preferably has experience working in a startup!

株式会社メルカリでは「新たな価値を生みだす世界的なマーケットプレイスを創る」というミッションを掲げ、あらゆる挑戦をしています。「Go Bold - 大胆にやろう」「All for One - 全ては成功のために」「Be Professional - プロフェッショナルであれ」という3つのバリューのもと、ミッション達成を共に目指していける仲間を募集しています。



▼Job Discription

・Design, develop, test, deploy, maintain, and improve backend software for our product.

・Solve complex performance problems and architectural challenges.

・Write and maintain technical documentation.

・Manage own project requirements, deadlines and qualities.







▼Minimum Requirements

・Experience with developing complex software systems scaling to millions of users with production quality deployment, monitoring, and reliability.

・Knowledge of software testing and ability to write testable code and proper tests.

・Ability to collaborate with team members including Product Managers, Data Scientists, Designer, Engineers, and Test Engineers to solve complex business problems.

・Communication skills in spoken and written English.

▼Additional Qualifications

・Experience with Go or PHP.

・Experience designing, developing, and managing microservices.

・Strong knowledge of container and orchestration tech like Docker and Kubernetes.

・Experience working on cloud infrastructure like GCP or AWS.

・Proficient computer science background such as a bachelor's, master's, or PhD degree.






・Go, PHPなどのプログラミング言語での開発経験







▼Contract Type


 Probationary Period: 3 months (salary same as above)



▼Work Hours

・Fixed working hours 10:00-19:00

 Flex time (core hours 12:00-16:00, 60 minute lunch)


・Annual salary, paid monthly

・Based on your experience, skills and potential

・Reviewed twice a year


・5-day work week (Sat/Sun off)

・National holidays, paid time off, summer/New Year's vacation, congratulatory leave, compassionate leave








 フレックスタイム制度あり(コアタイム:12:00~16:00 [休憩60分] )









・Health insurance

・Incentive program

・Employee stock ownership plan

・Full transportation coverage

・Custom PC

・Dual screen if needed

・Company smartphone

・Visa support

・New Employee Benefits at Mercari「mercibox












Mercari Engineering Blog


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