The business and/or technical problem the job is looking to solve is to ensure the stability, availability, and reliability of the Linux infrastructure by providing expert-level support, advanced troubleshooting, performance tuning, and capacity planning. This role also aims to modernize the infrastructure and manage enterprise risks.
Requirements
- 8+ years of progressive experience in Linux Server Administration with enterprise level skills in Physical and virtual environment management.
- Deep Understanding of Linux security methodologies, Hardening procedure and best practices.
- Deep Understanding of Linux Internals – Process Management, Memory handling. Kernel Tuning, Capacity planning.
- Hands on Experience with automation tools (Ansible, Chef, Puppet)
- Analyze server and storage characteristics (e.g., CPU behavior latency transmission speeds packet loss and throughput) triage and troubleshoot problems. Knowledge and experience of Root Cause Analysis (RCA) required
- Familiarity with complex multi-site and global network design multi-layered switch environment firewalls VPN Load balancers and DNS
- Experience with container technologies (docker, Kubernetes, openShift, AWS, GCP).
Responsibilities
- Deliver expert-level support and resolution for complex incidents and problems within the Linux ecosystem, ensuring minimal business impact and adherence to SLAs.
- Troubleshoot and resolve escalated issues in the Linux Environment.
- Proactively monitor system health, performance and capacity to ensure stability, availability and reliability.
- Perform Kernel Upgrade, patches and Vulnerability Management to ensure compliance meeting the organization standards.
- Design and enforce system hardening, access control, and security baselines aligned with the compliance framework.
- Server as escalation point and technical advisor for Level 1 and 2 administrators, develop technical runbooks and knowledge-based articles.
- Lead Major Incidents and engage with stake holders to perform Root Cause Analysis and provide permanent solutions.
Other
- Bachelor's/University degree in Computer Science/Engineering preferred or equivalent experience
- Full time
- Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.
