SRE/DevOps Engineer, Platform Reliability Engineering Group - Cloud Services Department (CLSD)

Job Description:
Business Overview
The Technology Platforms Division (TPD) drives the growth of Rakuten's ecosystem by delivering innovative, high-quality technology platforms characterized by integrated control and strategic partnerships.
Within TPD, the Cloud Platform Supervisory Department (CPSD) develops and manages Rakuten's state-of-the-art cloud platform, empowering global scalability and accelerating innovation across its diverse business units.
Department Overview
The Cloud Services Department (CLSD) at Rakuten Group provides high-quality cloud infrastructure and platform services to application developers across Rakuten. Our mission is to enable secure, scalable, and efficient digital innovation.
We deliver key domain services, including compute, storage, core infrastructure components, databases, container platform, observability, and gateway solutions, empowering Rakuten application teams to focus on their core business objectives.
Position:
Why We Hire
The Platform Reliability Engineering Group in the Cloud Services Department manages Gateway, CDN, and Security services, such as the APIC gateway, CDN, and external proxy, that empower services throughout the entire Rakuten Group. We are scaling our infrastructure and reliability capabilities, and we are looking for hands-on engineers to join our multicultural team and help build and operate mission-critical services at enterprise scale, with high quality and SLAs, under a tremendous amount of traffic.
Position Details
As an SRE/DevOps Engineer, you will design, build, and operate the infrastructure, tooling, and automation behind our platform, and own the reliability and operational health of the services you support. We are looking for someone with hands-on experience owning production reliability and a passion for automation, observability, and operational excellence.
Your work will include:
・Developing, maintaining, and optimizing Ansible playbooks, and ensuring consistent and reliable server configurations across environments
・Designing, implementing, and maintaining CI/CD pipelines, and collaborating with development teams to integrate automated testing, deployment, and monitoring
・Building, deploying, and managing containerized applications with Docker, and designing and managing Kubernetes clusters for scalability, reliability, and security
・Managing production servers for high availability, performance, and security, including Squid proxy servers for caching, filtering, and optimizing network traffic
・Monitoring server health, participating in on-call rotations, responding to incidents, and driving issues to root cause and permanent fix
・Owning SLO/SLA targets, improving observability and resilience, and contributing to post-mortems and continuous improvement
・Partnering with software engineering teams and architects to promote shared ownership of production reliability
Mandatory Qualifications:
・More than 7 years of hands-on experience in SRE, platform engineering, or DevOps
・Proven experience with Ansible for configuration management and automation
・Hands-on experience with CI/CD tools (e.g., Jenkins, GitLab CI/CD, CircleCI, or similar)
・Strong knowledge of Linux/Unix systems and experience managing production servers
・Hands-on experience with Docker for containerization and Kubernetes for orchestration
・Experience configuring and managing Squid proxy servers
・Familiarity with monitoring and logging tools (e.g., ELK stack, Prometheus, Grafana)
・Solid understanding of networking, system security, and troubleshooting
Desired Qualifications:
・CDN traffic and security experience
・Experience with Chef or other configuration management tools
・Familiarity with reliability engineering concepts: SLOs, error budgets, incident response, and chaos engineering
・Scripting experience with Python, Go, Bash, or similar languages
・Familiarity with cloud platforms (e.g., AWS, Azure, GCP)
・Experience operating large-scale platforms (API gateways, service meshes, or internal developer platforms)
・Experience mentoring junior engineers and sharing best practice
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Languages:
English (Overall - 3 - Advanced)