- Operation and maintenance of systems hosted on various Linux distributions: Short Message Service Center (SMSC), Bulk SMS platforms, Unstructured Supplementary Service Data (USSD), VoiceMail, Steering of Roaming, BonVoyage/WelcomeSMS messaging for roamers, Device Management System, Service Control Access Unit (SCU – a protocol translator between Diameter and CAMEL which processes charging of phone calls), Location Based Services and MMSC hosting systems for Yettel Hungary, Bulgaria and Serbia- System administration in SUSE, CentOS, Red Hat, Ubuntu and Fedora linux distributions; automation of preventive maintenance and backup tasks; shell scripting and troubleshooting Apache web servers; creating reports by business request using MariaDB- Troubleshooting and solving reported issues (alarms, B2B, B2C complaints), supported CNOC team- Change management – reconfiguration and upgrade of network elements - Planning, implementing, scheduling and controlling the release process to test and production environments

- The same responsibilites as stated in the System engineer job above for "One Crna Gora" mobile network operator after rebranding from Telenor

- Operation and maintenance of the E-mail system, DNS and web hosting servers- Resolving customer complaints regarding mail, DNS and hosting in accordance to given SLA