Senior Core Network Engineer

Job title: Senior Core Network Engineer

Office location: Spanskih boraca, Belgrade - Hybrid working (3 days in the office)

About the role:

• Maintain core network services
• Network optimization and implementation of network services
• Manage and handle network incidents
• Create and keep network documentation up to date and run small network projects
• Keep a high level of customer satisfaction by delivering reliable broadband service to the customers
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What will you be doing?

Maintain core network services 

• Perform daily maintenance and operational tasks on core and aggregation network devices
• Configure and deploy new core network services
• Install software updates, firmware, and security patches on network equipment
• Update switches with the latest configurations
• Monitor network performance and availability using Network Management Systems (NMS)

Network optimisation and implementation of network services

• Plan, test, and implement new network services and solutions
• Execute planned maintenance activities with minimal impact on customers and business operations
• Perform migration of network services and infrastructure
• Optimize core, aggregation, and access network performance
• Prepare configurations for new core and aggregation switches
• Plan and support network expansion
• Implement scalable and resilient network solutions aligned with business requirements

Manage and handle network incidents

• Respond promptly to alarms and incidents reported via monitoring tools, ticketing systems, or email alerts
• Provide technical support and guidance to Technology Operations Centre (TOC) engineers
• Maintain clear communication with internal and external stakeholders during incident resolution
• Document network issues, corrective actions, and provide reports to management
• Escalate incidents to vendors or relevant teams when necessary to ensure rapid resolution
• Proactively identify and mitigate potential network risks and service disruptions
• Troubleshoot network issues efficiently to minimize downtime and maintain service continuity

Create and keep network documentation up to date

• Create and maintain documentation related to planned maintenance activities
• Keep accurate and up to date records of network incidents and resolutions
• Create and keep up to date technical documentation for network projects and infrastructure

What we are looking for:

• Bachelor's degree in the relevant field
• CCIE and CCNP certification or relevant experience in an ISP or Telecom company
• Previous experience in network engineering including design, planning, installation, test and maintenance of IT networks
• Deep understanding of Ethernet, MPLS, IP, Routing and broadband technologies and protocols
• Hands on network troubleshooting skills
• Good written & spoken English language skills

Some of our key Benefits:

• Competitive salary
• Global Remote working for up to 2 week per year for those who are able to work remotely
• 25 days' paid holiday increasing each year, to a max of 35
• Extra days off for your birthday, move house and volunteer
• Access to a wellbeing platform, Rezilient
• Partnership with SOS Children's Village
• Private medical insurance
• Fit Pass discount
• Technology discount
• Team sports activities
• Massages in the office

What happens next?

• You apply (please send us your CV in English)
• We carefully review your application
• We'll get back to you — even if it's a no (for now)