Network Engineer – Load Balancing, F5 BIG-IP

Optiveum

. Run and operate the Load Balancing product end to end on F5 BIG-IP, from transitioning new infrastructure into operations through changes, releases and decommissioning .

Posted 11/4/2026full-timeRemote • PolandMid-LevelSenior💰 PLN 160 - PLN 200 per hourWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive experience in managing and troubleshooting F5 BIG-IP products, including LTM, DNS, and AFM, within high-availability data center environments. Proficient in incident management, ITIL processes, and network automation, with a strong focus on security and compliance.

Highest-signal resume keywords

F5 BIG-IP AdministrationIncident ManagementITIL ProcessesNetwork Automation with Ansible and PythonF5 Certified BIG-IP Administrator

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

F5 BIG-IP LTMF5 BIG-IP DNSF5 BIG-IP AFMIRulesTMOSSSL OffloadingFirmware Lifecycle ManagementApplication Delivery AnalysisVulnerability ManagementLog Analysis in Splunk

Soft Skills

Problem SolvingCommunicationCollaboration

Tools & Technologies

CheckMKSplunkCMDB

Certifications & Qualifications

F5 Certified BIG-IP AdministratorF5 Certified Solution ExpertITIL Certification

Industry Keywords

High-Availability Data CenterRegulated EnvironmentCVE TrackingService ImprovementChange Advisory Board

Tech Stack

Tools & technologies

AnsibleDNSPythonSplunk

About the role

Key responsibilities & impact

Run and operate the Load Balancing product end to end on F5 BIG-IP, from transitioning new infrastructure into operations through changes, releases and decommissioning
Configure, administer and troubleshoot F5 BIG-IP LTM, DNS and AFM
Manage virtual servers, pools, iRules and SSL offloading, and maintain the certificate lifecycle
Manage firmware lifecycle, including TMOS upgrades, and F5 BIG-IP licensing
Analyse and resolve application delivery issues, persistence, health monitors and HA-pair failover
Carry out planned maintenance and changes during out-of-hours maintenance windows and participate in the weekly Change Advisory Board
Handle second- and third-level incidents and support root cause analysis, known-error documentation and workarounds
Support the Lead Network Engineer during major incidents, including bridge calls, data collection and emergency changes
Tune event monitoring in CheckMK and report on service availability, uptime, MTBF, MTTR and capacity
Investigate log anomalies in Splunk and maintain standard syslog configurations
Run vulnerability management, including security patches, CVE tracking and remediation, in line with ISMS requirements
Maintain the CMDB with IP addresses, VLANs, VRFs and configuration items, and track licences and asset lifecycle
Support internal and external audits and drive continual service improvement and automation
Share knowledge with stand-ins and contribute to runbooks, configuration standards and SOPs

Requirements

What you’ll need

Several years of hands-on experience with F5 BIG-IP (LTM, DNS, iRules, TMOS) in high-availability data center environments
Working knowledge of F5 BIG-IP AFM
F5 Certified BIG-IP Administrator (F5-CA) or equivalent certification
Willingness to join a rotating 24/7 on-call schedule, including nights, weekends and public holidays
Experience handling major incidents in a regulated, ideally banking, environment
Solid understanding of ITIL processes in a regulated environment
Fluent English, spoken and written
An existing 1-person company (działalność gospodarcza) registered in Poland
German language skills are a plus
F5 Certified Solution Expert (F5-CSE) is a plus
ITIL certification is a plus
Network automation with Ansible and Python, and experience with CheckMK and Splunk are a plus
CV in English
Candidates presented for this client in the last 6 months cannot be considered again

Benefits

Comp & perks

100% remote work
Full-time schedule
B2B cooperation agreement with Optiveum through the end of 2026, with a planned extension through 2027
Rotating 24/7 on-call compensation implied by the contracted role