About this role
Network Engineer – Data Center Network / Cisco ACI & NexusAbout the OfferWe are looking for an experienced Network Engineer – Data Center Network 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. The data center network is planned to move to Huawei components from 2028, so you will also have the chance to get involved in that transition.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)Location: Remote from PolandStart: ASAPLanguages: fluent English is required; German is a strong plusResponsibilities:Run and operate the Data Center Network product end to end on Cisco ACI and Cisco Nexus (9k, 7k), and on Huawei components from 2028: from transitioning new infrastructure into operations, through changes and releases, to decommissioningConfigure, administer and troubleshoot Cisco ACI, including APIC, tenant policies and L4-L7 service graphsConfigure and support Cisco Nexus switching with NX-OS, vPC, FEX and M-FCCarry out ACI fabric upgrades and EPG changes in coordination with the Lead Network EngineerManage the firmware lifecycle for Nexus and ACI and handle licences with Cisco Smart LicensingPrepare for the planned Huawei CloudEngine rolloutAnalyse and resolve fabric outages, packet loss and multipath issuesHandle 2nd and 3rd-level incidents and support root cause analysis, known-error documentation and workaroundsSupport the Lead Network Engineer and on-call lead 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 operations experience in data center environmentsSolid knowledge of Cisco ACI, including APIC, tenant concepts and L4-L7 integrationSolid knowledge of Cisco Nexus and NX-OSCisco CCNA or CCNP Data Center certification (or equivalent); CCNP Data Center preferred for senior candidatesSome experience with Huawei data center / CloudEngine components, or willingness to learn them quicklyExperience 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 ManagementExperience maintaining operational documentationFluent English, spoken and writtenAn existing 1-person company (działalność gospodarcza) registered in PolandNice to Have:German language skillsHuawei HCIP or HCIE Datacom certificationITIL certificationNetwork automation with Ansible and Python, and experience with CheckMKRecruitment 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