Senior Lead Sysadmin / NOC Tech Lead

Senior Lead Sysadmin / NOC Tech Lead

About the Role

We are looking for a technical lead who will manage a team of six L1 engineers, a multi-server architecture with a large hardware fleet and interconnected services, and the full cycle — from deployment to monitoring and incident resolution.

Complex, rare, and non-standard incidents are yours to handle personally. But the strategic mission is broader — to build a system where typical problems are resolved at the L1 level via runbook, without your involvement. Through documentation, mentorship, and continuous process improvement.

You maintain the full picture of the architecture: you understand service dependencies, participate in releases, and assess the risks of changes.

Responsibilities

• Handling complex incidents that exceed runbook scope (Manual Cases)
• Writing, updating, and reviewing runbooks for the L1 team
• Mentorship: helping on-call engineers work through incidents and grow their skills
• Participating in Change & Release processes: risk assessment, deployment support
• Maintaining and updating the Service List: service descriptions, dependencies, criticality
• Preparing Root Cause Analysis for significant incidents
• Interfacing with Development and Product teams during escalations

Requirements

• Linux — deep knowledge: network stack, performance diagnostics, system tuning
• Docker / Docker Compose — confident configuration, debugging, optimization
• NGINX, HAProxy — setup, load balancing, SSL/TLS, upstream management
• MySQL — replication, cluster configurations, backup/restore, query and schema optimization
• Redis — architecture, diagnostics, failover and persistence configuration
• RabbitMQ — understanding of queue model, diagnostics, recovery from failures
• Memcached — configuration, diagnostics, optimization under load
• ClickHouse — basic operations, diagnostics, reading query profiles
• PHP — operations-level understanding: interpreter, configuration (php-fpm, php.ini), logs, basic debugging
• Monitoring and alerting — configuring Nagios (NRPE/NCPA), Loki, Sentry; writing checks and alerting rules
• Git / GitLab / SVN — understanding of VCS, working with pipelines, participation in release processes
• RAID — understanding of Software and Hardware RAID, degraded array diagnostics
• LLM assistants (Claude, Cursor, etc.) — confident use for complex problem analysis, runbook writing, and documentation automation
• Experience writing technical documentation and runbooks
• English for reading technical documentation and alerts
• 5+ years of experience as a sysadmin or DevOps engineer