Network Engineer – Load Balancing / F5 BIG-IP

Network Engineer – Load Balancing / F5 BIG-IPAbout the OfferWe are looking for an experienced Network Engineer – Load Balancing (F5 BIG-IP) to join the network operations team of the central IT services provider of one of Germany's largest banking groups. The client runs the core banking infrastructure for hundreds of regional savings banks across Germany, so you will work in a large, stable and highly regulated environment.For this role, Optiveum is the recruitment and contracting party, which means you will sign the B2B cooperation agreement directly with us.Key Details:Rate: 160–200 PLN/h net (B2B), depending on experienceContract: B2B with Optiveum, until the end of 2026 with a planned extension through 2027Work Model: 100% remote, full-time (5 days per week)On-call: rotating 24/7 on-call, plus planned changes in maintenance windows (usually nights and weekends)Location: Remote from PolandStart: ASAPLanguages: fluent English is required; German is a strong plusResponsibilities:Run and operate the Load Balancing product end to end on F5 BIG-IP (LTM, DNS, AFM): from transitioning new infrastructure into operations, through changes and releases, to decommissioningConfigure, administer and troubleshoot F5 BIG-IP LTM, DNS and AFMManage virtual servers, pools, iRules and SSL offloading, and look after the certificate lifecycleManage the firmware lifecycle, including TMOS upgrades, and F5 BIG-IP licensingAnalyse and resolve application delivery issues, persistence, health monitors and HA-pair failoverCarry out planned maintenance and changes in maintenance windows outside core hours and take part in the weekly Change Advisory Board (CAB)Handle 2nd and 3rd-level incidents and support root cause analysis, known-error documentation and workaroundsSupport the Lead Network Engineer during major incidents (bridge calls, data collection, emergency changes)Tune event monitoring in CheckMK and report on service availability (uptime, MTBF, MTTR) and capacityInvestigate log anomalies flagged in Splunk and maintain standard syslog configurationsRun vulnerability management (security patches, CVE tracking, remediation) in line with ISMS requirementsMaintain the CMDB (IP addresses, VLANs, VRFs, configuration items) and track licences and asset lifecycleSupport internal and external audits and drive continual service improvement and automationShare knowledge with stand-ins and contribute to runbooks, configuration standards and SOPsRequirements:Several years of hands-on experience with F5 BIG-IP (LTM, DNS, iRules, TMOS) in high-availability data center environmentsWorking knowledge of F5 BIG-IP AFMF5 Certified BIG-IP Administrator (F5-CA) or equivalent certificationWillingness to join a rotating 24/7 on-call schedule, including nights, weekends and public holidaysExperience handling major incidents in a regulated (ideally banking) environmentSolid understanding of ITIL processes in a regulated environment: Incident, Problem, Change, Release, Knowledge, Configuration, Event, Availability and Capacity ManagementFluent English, spoken and writtenAn existing 1-person company (działalność gospodarcza) registered in PolandNice to Have:German language skillsF5 Certified Solution Expert (F5-CSE)ITIL certificationNetwork automation with Ansible and Python, and experience with CheckMK and SplunkRecruitment Process:Please apply with your CV in EnglishWe will share your CV with the client only after you have agreed to itCandidates who have already been presented for this client in the last 6 months, directly or through another agency, cannot be considered again