Software Engineer, Site Reliability [Internship]

Tokyo, Japan · Student Recruitment · EN/JP


(Japanese follows English)

▼ Our mission

We are always looking for new challenges to help us fulfill our mission to create value in a global marketplace where anyone can buy & sell.

The world is full of objects and services being produced and sold, but many of them are thrown away without people realizing that they might be valuable to someone else, wasting valuable natural resources. To contribute towards eliminating waste, we have launched Mercari, a marketplace where people can buy and sell easily and safely, in Japan and the United States.

Merpay’s mission is to build trust for a seamless society. Our aim is to change the way money is circulated, establish a Merpay that provides all kinds of services, and develop a world where everyone can enjoy peace of mind.

Merpay aims to bring liquidity and innovation to the world of finance, and create new value not just for consumers, but for businesses as well.

▼ Our three values (Go Bold, All for One, Be a Pro)

We work together to create a global marketplace, but the road to this goal is by no means easy. In order for us to make new innovations and take on new challenges that no one has taken before, all of us take ownership of our work and make use of our knowledge so that we can create the best product possible as one team. To achieve this, we all take action based on our three company values (Go Bold, All for One, and Be a Pro).

▼ The goal of the engineering organization

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 all of us 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.



世の中では多くのモノ・サービスが生産・販売されていますが、誰かには価値があるのに捨ててしまうなど地球資源の無駄になっていることが多いと私たちは考えています。 「捨てる」をなくすために、個人間で簡単かつ安全にモノを売買できるフリマアプリ「メルカリ」を日本とアメリカで展開しています。




▼ 3つのバリュー(Go Bold, All for One, Be a Pro)

世界的なマーケットプレイスを創るために我々は集まっていますが、この目標への道のりは決して平坦ではありません。まだ誰も挑戦したことのないようなイノベーションや破壊的な創造を起こすため、我々は各自がオーナーシップを持ち、専門的能力を発揮することで、メルカリというチームとして最高のプロダクトを創ります。これを達成するために我々は3つのバリュー(Go Bold, All for One, Be a Pro) という全社員が共有する行動指針のもと行動しています。

▼ Engineering 組織が目指すもの


チーム一丸となり、Go Boldにオーナーシップを発揮して個が成長し、メルカリのミッションの実現に向けた挑戦をし続けていきます。

▼Job Description

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

▼ About Mercari & Merpay SRE Teams

By working at Mercari, one of Japan’s largest marketplace applications, you will be able to gain essential technical skills, and gain experience in SRE, working together with team members who have extensive expertise in development and system operations.


SRE(Site Reliability Engineering)チームの一員として、フリマアプリ「メルカリ」やメルペイを支えるサーバ・ネットワークの構築・運用、システムの自動化、耐障害性の向上や障害発生時の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。




▼ Minimum Requirements

・Shared belief in Mercari and Merpay’s mission and values

・Students over the age of 16

・Basic knowledge of network protocols such as TCP/IP, Ethernet, HTTP2, TLS, DNS, SMTP

・Basic knowledge of algorithms, data structures, main programming paradigms, parallel processing programming, distributed processing systems, search engines, encoding

・Basic knowledge of CPU, OS, compilers, VM

・Basic knowledge of security and encryption

・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

・Experience using RDBMS such as MySQL

・Experience using middleware such as Nginx or Memcached

・Experience with Go, PHP, or Ruby

・Experience with container technology such as Docker or Kubernetes

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


・Experience with RDBMS such as MySQL

・Experience with middleware such as nginx, memcached

・Experience in software development and operations using Go, or PHP, or RubyPerl

・Experience using or operating full-text search engines like Solr, Elasticsearch, etc.

・Knowledge or experience developing machine learning technologies

・Experience using container technologies like Docker, Kubernetes, etc.

・Experience developing or operating large-scale services

・Experience using cloud services like Sakura, AWS, GCP, etc.

・Experience contributing and publishing OSS

・A certain level of achievement in programming contests (AtCoder cyan or higher, as a reference)

・Experience participating in ISUCON

・Experience operating distributed processing/databases such as Apache Kafka, or Apache Cassandra

・Experience planning/operating monitoring systems using Datadog, etc.

▼ Our Ideal Candidate

・A skilled communicator capable of offering valuable insight in team discussions

・Capable of taking on bold challenges and learning from mistakes

・Proactive and capable of thinking independently for the good of the team

・Eager to gain new knowledge and ready to proactively challenge themselves using the newest technologies

▼ Language Ability

・Business level English or Japanese

























・プログラミングコンテストでの一定以上の成績(目安 AtCoder水色以上)


・Apache Kafka, Apache Cassandraなどの分散処理・データベースの運用を行った経験


▼ 求める人物像





▼ 言語能力



▼Contract Type




▼Work Hours


 Able to work more than 20 hours per week


・Hourly wage (Salary: Negotiable)











・Full transportation coverage

・Custom PC

・Dual screen if needed

・Visa support

・Accommodation for those who are from outside of Tokyo area






Apply for this job