This position is closed and is no longer accepting applications.

Senior Site Reliability Engineer

KOMOJU Musashino-Shi, Tokyo
  • 💴 ¥10M ~ ¥14M annually
  • 🏡 Fully remote (worldwide)
  • 🧪 Minimum years of experience unspecified
  • 💬 No Japanese required
  • 🗾 Japan residents only
  • 🧳 No relocation support


KOMOJU Musashino-Shi, Tokyo

The leading cross-border payment gateway for Japan. We power payments for companies like video game distribution platform Steam and the popular mobile app TikTok.

Key benefits

  • Developer-centric, inclusive culture
  • International at our core
  • Generous holiday policy

About the position

KOMOJU platform connects thousands of merchants payment requests to a large number of payment gateways. In the SRE team, we are responsible for each of our merchants successfully creating payment transactions with the large number of payment gateways that we support.

Our platform connects with the largest payment gateways in Japan, such as all the major credit card acquirers, PayPay, all the convenience store payments, LinePay, MerPay and much more. Our team is responsible to keeping the platform up to handle the payments reliably.

In this senior SRE engineer position, you will get a unique opportunity to work on many technologies, ranging from specialized payment related technologies to developing on our cloud native services on AWS. As credit card transactions are a large portion of Degica’s payments, you will be closely working with our accounting and business departments as well, collaborating and coordinating with them on various projects.


  • Actively participate in improving and maintaining our AWS infrastructure
  • Implement monitoring and alerting to system
  • Implementing and maintaining the CICD pipeline
  • Troubleshooting and debugging the system
  • Improving developer productivity with tooling
  • Securing the system and adhere to compliance


  • Experience with AWS cloud platform
  • Experience with IaC tools Terraform or Cloudformation
  • Knowledge of Linux administration and networking protocols
  • Working knowledge of one or more programming languages such as Ruby, Python or Go
  • Experience with Docker containerization and its orchestration tools like ECS
  • Experience with monitoring tools such as DataDog, New Relic, Prometheus, etc.
  • Knowledge of RDBMS such as MySQL and PostgreSQL
  • Experience on working with CICD tools such as GitHub Actions, Jenkins, Circle CI, etc.

Nice to haves

While not specifically required, tell us if you have any of the following.

  • Strong communication skills to work closely with outside companies and various departments inside the organization
  • Knowledge of TCP/IP and other networking protocols
  • Experience with AWS Direct connect


10 to 14 million JPY annually.

Includes (rough estimate of) profit share. Based on experience and skill level.

Hiring Process

  1. 1

    Initial Screening

    Your application will be reviewed by our engineers. Rather than just your work history, we’re looking for something that demonstrates a passion for programming. This could be a personal project or open source contributions for instance. We want to work with people who love their trade, and work to improve their skills.

  2. 2

    Two interviews

    We’ll ask you to present to us something that you’ve built and can speak passionately about. Our engineers will then ask you open ended questions about what you’ve built. We’ve found this approach allows you to highlight your strengths to us, and demonstrate how you’d fit into the team.

  3. 3


    After you pass two rounds of interviews, we’ll typically make an offer.

Meet KOMOJU's Developers

Nigel was fresh out of college when he joined KOMOJU as a developer. He's now risen to tech lead, where he's helped build out their payment platform while maintaining a healthy work-life balance.

Read his story...

Nicole joined KOMOJU in 2020, and worked her way up to be technical lead of the merchant management team. She shares her journey, how KOMOJU supported her career growth and how the company is adapting to its growing needs.

Read her story...

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