Network Engineer (Load Balancing / F5 BIG-IP)

Network Engineer (Load Balancing / F5 BIG-IP)

Quick Facts

• Fully remote B2B/UZ contract
• Contract through end of the year with option to extend to 2027

Description

Remote role focused on production load balancing infrastructure built on F5 BIG-IP (LTM, DNS, AFM). You will configure and administer virtual servers, pools, iRules, SSL offloading, certificates, monitoring, and HA failover mechanisms. You’ll also support 2nd/3rd level operations through incident/problem/change workflows, including Emergency Changes and Root Cause Analysis during major incidents.

Responsibilities

• Configure, administer, and maintain F5 BIG-IP load balancing infrastructure (LTM, DNS, AFM)
• Operate the production environment end-to-end: implementation, change/updates, and decommissioning
• Manage Virtual Servers, Pools, iRules, SSL Offloading, persistence profiles, health monitors, and certificates
• Manage F5 BIG-IP software/device lifecycle (TMOS updates, firmware, and licenses)
• Diagnose and resolve application delivery and load balancing issues (persistence, health monitors, HA failover)
• Handle incidents as part of 2nd/3rd line support; participate in Root Cause Analysis
• Support Major Incidents, join bridge calls, collect diagnostic data, and execute Emergency Changes
• Plan maintenance work and changes within service windows, including nights and weekends
• Participate in weekly Change Advisory Board (CAB) meetings
• Support Problem Management; document Known Errors and define workarounds
• Configure and optimize CheckMK monitoring event thresholds and correlation
• Monitor service and infrastructure availability and KPIs (Uptime, MTBF, MTTR)
• Analyze logs and security events; collaborate with Security and handle Splunk alerts
• Monitor capacity and performance (bandwidth, ports, CPU, memory)
• Manage vulnerabilities: review CVEs, assess security patches, and coordinate remediation
• Support security incident handling with Information Security specialists
• Maintain CMDB documentation (IP addressing, VLAN, VRF, device/resource mapping)
• Support license and infrastructure lifecycle management (from purchase to retirement)
• Support internal and external audits and track remediation actions
• Identify optimization/automation opportunities and contribute to Continual Service Improvement (CSI)
• Handle Service Requests and Standard Changes per ITIL processes
• Create and update operational documentation, technical instructions, configuration standards, and maintenance procedures
• Collaborate with international teams and provide knowledge transfer to replacements

Requirements

• Several years of hands-on experience administering and maintaining F5 BIG-IP in high-availability data center environments
• Very good knowledge of F5 BIG-IP, especially LTM and DNS, iRules, and TMOS
• Knowledge of F5 BIG-IP AFM
• Practical experience with Virtual Servers, Pools, SSL Offloading, Persistence Profiles, and Health Monitors
• Experience with High Availability (HA) including failover configuration and diagnostics
• F5 Certified BIG-IP Administrator (F5-CA) or equivalent
• Experience supporting production infrastructure and providing 2nd/3rd line technical support
• Knowledge of ITIL processes: Incident, Problem, Change, Release, Knowledge, Configuration Management
• Knowledge of Event, Availability, and Capacity Management
• Experience with change management, updates, and infrastructure lifecycle
• Infrastructure security knowledge: vulnerability management and security incident handling
• Ability to analyze and solve complex technical problems; participate in Major Incidents
• Availability for a rotating 24/7 on-call schedule (nights, weekends, holidays)
• Fluent English for documentation and cross-team collaboration
• German knowledge to communicate with the client

Benefits

• B2B/UZ cooperation model
• Fully remote work
• Full dedication (5 days per week)
• Possibility to extend the project through 2027
• Participation in an international client project
• Ongoing team support from ITELENCE