Technical Lead, Site Reliability Engineering

Job Description:Why should you choose us?

Rakuten Symphony is reimagining telecom, changing supply chain norms and disrupting outmoded thinking that threatens the industry’s pursuit of rapid innovation and growth. Based on proven modern infrastructure practices, its open interface platforms make it possible to launch and operate advanced mobile services in a fraction of the time and cost of conventional approaches, with no compromise to network quality or security.

Rakuten Symphony has operations in Japan, the United States, Singapore, India, South Korea, Europe, and the Middle East Africa region. For more information, visit:

Building on the technology Rakuten used to launch Japan’s newest mobile network, we are taking our mobile offering global.

To support our ambitions to provide an innovative cloud-native telco platform for our customers, Rakuten Symphony is looking to recruit and develop top talent from around the globe. We are looking for individuals to

join our team across all functional areas of our business – from sales to engineering, support functions to product development.

Let’s build the future of mobile telecommunications together!

About Rakuten Group, Inc. (TSE: 4755) is a global leader in internet services that empower individuals, communities, businesses and society. Founded in Tokyo in 1997 as an online marketplace, Rakuten has expanded to offer services in e-commerce, fintech, digital content and communications to approximately 2 billion members around the world. The Rakuten Group has over 30,000 employees, and operations in 30 countries and regions. For more information visit .

As an SRE at Rakuten Symphony, you will be instrumental in maintaining the stability, scalability, and reliability of Rakuten Cloud production environments. Your responsibilities will include supporting the Rakuten Cloud Native Kubernetes Platform & driving automation for Rakuten Cloud Native Platform deployments, including Day 2 operations, to ensure faster deployment cycles and high availability across platforms.

Key Responsibilities:

• Maintain system reliability and performance by proactively identifying and resolving issues to meet SLAs.
• Collaborate with engineering teams to diagnose and resolve complex technical challenges using strong analytical and problem-solving skills.
• Create and maintain detailed runbooks to standardize operational procedures and improve team efficiency.
• Act as a key member of the platform team, collaborating closely with application teams to ensure uptime, seamless integration and optimal performance of the overall system.
• Optimize Rakuten Cloud platform infrastructure for high availability and scalability.
• Drive platform automation initiatives, partnering with platform and associated teams to enhance availability and accelerate deployment timelines.
• Coordinate with cross-functional teams to support successful new product development and rollout.
• Optimize infrastructure automation for Rakuten Cloud to deliver high availability, scalability, and operational excellence.
• Develop automation tools using Ansible, Shell scripting, or Python to empower Level 2 engineers and streamline workflows.
• Collaborate within a global team across Japan, Europe, and North America, ensuring 24/7 support through coordinated shift operations.
• Analyze and troubleshoot issues identified during lab testing or in production environments.

Relevant Skills:

• Expertise in Linux system administration with strong troubleshooting and problem-solving capabilities.
• Good knowledge of cloud-related services like compute, storage, network, and automation

Experience in Software Defined storage (SDS)

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• Certified Kubernetes Administrator (CKA) or equivalent hands-on experience with Kubernetes.
• Solid understanding of cloud services, including compute, storage, networking, and automation frameworks.
• Understanding of Identity and Access management and security vulnerabilitymitigation
• Experience with virtualization technologies and containerized environments.
• Strong scripting skills in Bash, Python, and other automation tools to streamline operations.
• Passion for innovation, with an interest in exploring emerging cloud technologies, tools, and processes to drive business value.
• Self-driven and quick learner, capable of delivering results independently with minimal supervision.
• A Bachelor’s Degree in Computer Science, Engineering or equivalent experience

Working Shifts :

• 6 AM to 2 PM
• 2PM to 10PM
• 10PM to 6AM

Rakuten SHUGI Principles:

Our worldwide practices describe specific behaviours that make Rakuten unique and united across the world. We expect Rakuten employees to model these 5 SHUGI Principles of Success.

• Always improve, always advance. Only be satisfied with complete success - Kaizen.
• Be passionately professional. Take an uncompromising approach to your work and be determined to be the best.
• Hypothesize - Practice - Validate - Shikumika. Use the Rakuten Cycle to success in unknown territory.
• Maximize Customer Satisfaction. The greatest satisfaction for workers in a service industry is to see their customers smile.
• Speed!! Speed!! Speed!! Always be conscious of time. Take charge, set clear goals, and engage your team.