This position is closed and is no longer accepting applications.

Site Reliability Engineer (SRE)


Minato-ku, Tokyo
    💴 ¥6M ~ annually
    🏡 No remote
    🧪 3+ years experience required
    💬 No Japanese required
    🌏 Apply from abroad
    🧳 Relocate to Japan

About CTW

CTW Minato-ku, Tokyo

We are Japan’s No. 1 IP game platform company, specializing in creating and distributing browser games. Join us and become part of a passionate tech team working on building cutting-edge technologies in the gaming industry.

Key benefits

  • Creative freedom for developers
  • Feel your contribution
  • We rely on motivation 3.0

About the position

As a Site Reliability Engineer (SRE), you will be responsible for ensuring a reliable and scalable platform infrastructure. You will be working closely with the development team and be an integral part of increasing the number and quality of users as the G123 platform.


  • Build software and systems to manage platform infrastructure and applications
  • Improve services through testing and release procedures
  • Balance feature development speed and reliability with well-defined service level objectives
  • Improve reliability, quality, automation, and time-to-market of our H5 game platform.
  • Focus on all aspects of system reliability from observability, automated testing, bench-marking, fault tolerance, tracing, on-call, etc.


  • Bachelor’s degree in Computer Science, Computer Engineering, Electrical Engineering, Mathematics or a closely related computer technical field
  • Experience in using clouds (AWS/Azure /GCP/AliCloud, etc.) to design and implement systems
  • Experience in monitoring & telemetry with Prometheus/Grafana/DataDog, etc.
  • Ability to program with one or more high level languages, such as Go (preferred), Python, Node.js, and JavaScript
  • 3 years work experience in SRE, or DevOps, or Backend engineering
  • 2 years work experience in providing on-call for critical applications in production environment
  • 1 year work experience in software developing of backend system or infrastructure solutions

Nice to haves

These aren’t required, but be sure to mention them in your application if you have them.

  • Experience with Terraform or other equivalent IaC solutions
  • Experience with containers or Kubernetes (K8s)
  • Experience in a startup environment
  • Can adapt to fast-paced coding and sprints


Your compensation will be determined based on your experience as well as the whole interview process. Our salary range is as follows:

  • Level 1: 6-9M JPY
  • Level 2: 8-12M JPY
  • Level 3: 10-33M JPY

The first level is for individual contributors (junior positions), while the last level is for senior and management positions.

Hiring Process

  1. 1

    HR interview

    This is a friendly conversation with one of our recruiters where we're checking that your general vibe matches, and answer any questions you might have.

  2. 2

    Technical screening

    The technical screening typically is two rounds of interviews, followed by an interview with the CTO.

  3. 3

    HRD Interview

    The final interview while be conducted with our Head of HR. You can ask questions, negotiate the salary and talk about the next steps.

  4. 4


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