Software Engineer, Site Reliability

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.

As a Site Reliability Engineer (SRE), you will be responsible for building the servers/networks for Mercari’s marketplace app. Additionally, you will be responsible for system automation and incident handling, as well as working on development to improve performance, reliability, and scalability.

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。

SRE(Site Reliability Engineering)チームの一員として、フリマアプリ「メルカリ」を支えるサーバ・ネットワークの構築・運用、システムの自動化や障害対応などの業務に加えて、システムのパフォーマンスや信頼性、スケーラビリティを向上させるためのソフトウェアの開発・運用を行っていただきます。

▼Job Description

・Diagnose and solve technical issues

・Build and maintain automation tools for deployment, server provisioning, and other various operations

・Build and maintain monitoring environments to be used in incident detection and capacity planning

・Build and maintain various applications and middlewares, and work to improve their performance

・Build the infrastructure for microservices








▼Minimum Requirements

・Basic understanding of TCP/IP, HTTP, and other network protocols

・Ability to trace and solve technical issues (performance drops, etc.)

・Programming ability sufficient to build any applications or middlewares necessary to fix bugs or improve system performance and reliability

▼Additional Qualifications

・Experience with RDBMS such as MySQL

・Experience with middleware such as nginx, memcached

・Experience with Go, PHP, or Perl

・Experience with container technology such as Docker or Kubernetes

・Experience in large-scale service

・Experience with Sakura, AWS, GCP, or other cloud services

・Strong understanding of security

・Experience releasing or contributing to OSS

・Experience working with distributed systems/databases like Apache Kafka or Apache    















・Apache Kafka, Apache Cassandraなどの分散処理・データベースの運用経験


▼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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