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Tokyo, Japan

Although the Mercari API was designed and implemented as a monolithic API, we are working on migrating the API to microservices. This will allow us to divide responsibilities and make technological investments for a stronger system and organization capable of handling even greater expansion. Of course, we will continue to run our services as we implement these changes, and we aim to make daily improvements to provide an even better experience for our customers.

We are seeking backend engineers who can work proactively and independently during the team's current stage, taking ownership over various discussions, developing features, providing spec feedback, and making technical decisions.


* Design, development, and operation of Mercari's API and web app using Go and PHP

* Design, development, and operation of tools to support the customer support team and planning-related work

* Design, development, and operation of various microservices making up the Mercari API

* Lead the team's development


Minimum Qualifications

・Strong understanding of the company mission and values

・Ability to design, develop and operate large-scale backend systems in heavy traffic scenarios

・Knowledge of and experience with software test including unit testing, functional testing, e2e testing

・Knowledge of and experience with optimization of queries and data model design for the efficient usage of RDBMS and NoSQL databases.

・Cloud development experience (preferably GCP, or AWS)

・Experience with team development using Git/Github or similar version management systems


・Experience with project management and/or team leadership

・Experience with design, development, and operation of backend APIs using Go

・Experience developing and operating in a microservices architecture

・Experience with on-call support for a service

・Knowledge of web app security

・Experience with development using external APIs such as payment, delivery, etc.

・Experience sharing and contributing to an OSS project

・Experience with scrum

Technical Environment

・Languages: Go & PHP

・Infrastructure: Dedicated servers, MySQL, memcached, Nginx, Solr, Elastic Search, Google Cloud Platform (Compute Engine, Kubernetes Engine, Spanner, Cloud SQL, Datastore, Storage, Stackdriver Logging, Dataflow, Pub/Sub, etc.)

・Configuration management tool: Terraform

・CI/CD: Circle CI / Spinnaker

・Monitoring: Stackdriver Monitoring / Datadog / PagerDuty / Sentry / Mackerel / NewRelic / ELK Stack

・Knowledge Tools: Confluence / Crowi

・Other: GitHub / Slack / JIRA

・Process: Scrum

How to apply

Apply using this link:

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