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Urgent

Linux System Administrator

Nomura Securities Co., Ltd.

Job Summary

Join Nomura’s Special Infrastructure team as Linux System Administrator supporting the Equity business unit. In this role you will provide dedicated production support for mission critical Linux systems, ensuring high availability, performance and security. You will monitor and troubleshoot systems, manage deployments and patches, automate operational tasks, and work closely with infrastructure, application and business teams to resolve incidents and drive continuous improvement. Responsibilities： Provide in-depth, focused support for COLO/DMZ production infrastructure used for high-frequency, low-latency trading by Japan’s #1 broker, Nomura. Collaborate closely with High Frequency Trading Systems development, project managers, and support teams. Deliver creative solutions and implement them within short, aggressive timeframes. Lead knowledge acquisition and apply that expertise to help Nomura retain its #1 position on all Japan exchanges. Engage confidently and directly with the High Frequency Trading desk on a variety of client-related needs. Occasionally required to join client calls to communicate with clients and translate their requirements into practical designs and solutions for the COLO data center. Participate in, and lead when required, new exchange connectivity build-out projects. Though infrequent, these projects require focused execution under tight deadlines. Operate independently and with team members across diverse locations, including Greater Asia, Europe, and the USA. Take responsibility for systems availability and smooth operations, including troubleshooting, incident investigation, emergency escalation, and root-cause analysis. Perform system administration tasks such as software installation and configuration, patching, system monitoring, performance tuning, capacity planning, and disaster recovery drills. Work with the Cross Platform Engineering team to deliver solutions: define operational requirements, negotiate schedules, and drive the implementation of engineered solutions. Execute

Company Info

Nomura Securities Co., Ltd. is a Japanese financial services company and a wholly-owned subsidiary of Nomura Holdings, Inc., playing a central role in the Nomura Group's core securities business. It operates as a leading securities and investment banking company in Japan, providing a broad range of services to individual investors and corporate clients. These services include investment advisory, securities underwriting, wealth management, and M&A financial advisory. The company operates through five business divisions: retail (in Japan), global markets, investment banking, merchant banking, and asset management, with a global presence. It was established on December 25, 1925, in Osaka.

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