System Administrator (Linux Infrastructure & Reliability)

We are seeking an experienced **System Administrator** to design, operate, and continuously improve a **Red Hat–based Linux infrastructure** supporting high-availability, high-throughput systems. This role is central to maintaining operational excellence across performance-critical environments that process large volumes of network and application traffic. This position is ideal for a **senior, hands-on Linux professional** who is comfortable owning production systems end-to-end, operating modern **Golang-based server stacks** , and working at the intersection of systems, networking, and security. **Key Responsibilities** - Architect, administer, and optimize **Red Hat Enterprise Linux–based systems** (RHEL and compatible distributions) across production and non-production environments - Design and operate **high-availability system architectures** , including redundancy, failover, and capacity planning - Deploy, configure, and operate **high-performance Golang servers** (custom or framework-based) for **HTTP and TCP services** , traffic handling, and backend communication - Tune system performance at the **kernel, filesystem, and network stack levels** to support low-latency, high-throughput workloads - Implement and maintain **system observability** : metrics, logs, alerts, and performance baselines - Lead **incident response and post-mortem analysis** , including root-cause identification and long-term remediation - Design and enforce **backup, recovery, and disaster-recovery strategies** for critical systems - Apply **security hardening** , patch management, and vulnerability remediation in coordination with security teams - Automate infrastructure provisioning, configuration, and operational workflows using **scripting and automation frameworks** - Own system lifecycle management: **build standards, configuration baselines, upgrades, and decommissioning** - Collaborate closely with **network, security, and platform engineering teams** to ensure end-to-end system reliability and resilience - Support infrastructure scaling initiatives and contribute to **architecture decisions** as the platform evolves **Qualifications** - **3+ years** of hands-on experience administering **Linux systems** in production environments - Understanding of **Linux internals** , kernel behavior, process scheduling, memory management, and I/O performance - **Hands-on experience deploying, configuring, and operating high-performance Golang servers** (custom or framework-based) for HTTP/TCP services, traffic handling, and backend communication - Strong knowledge of **networking fundamentals and system-level networking** (TCP/IP, DNS, routing concepts, firewall interaction) - Proven experience with **performance tuning, capacity planning, and system scalability** - Experience implementing and maintaining **monitoring, alerting, and centralized logging systems** - Advanced **shell scripting** skills (Bash or similar) for automation and operational efficiency - Solid understanding of **backup architectures, data integrity, and disaster-recovery planning** - Strong troubleshooting skills with a structured, analytical approach to complex system issues - Ability to operate effectively in **high-availability, security-sensitive, and always-on environments** Quelle: https://ch.linkedin.com/jobs/view/system-administrator-linux-infrastructure-reliability-at-trafficmind-4354023240

Level: mid level