Network DevOps Engineer

About the role

T-Digital, the Deutsche Telekom tech unit in Greece, is looking for a Network DevOps Engineer to take end-to-end ownership of its IP backbone, data center fabric and transport network infrastructure. The role covers designing, deploying, maintaining and extending multi-vendor data center networks (Cisco and Juniper), driving network automation and Network as Code, and providing reliable internal data center networking and backbone transport.

Key responsibilities

• Take full ownership of the design, implementation, operation and continuous development of the IP backbone, data center fabric and transport network.
• Design, deploy and maintain multi-vendor data center networks (Cisco, Juniper) and ensure high availability, performance, reliability, scalability, security and cost efficiency.
• Develop and run network automation, provisioning, configuration management and assurance solutions with Python, Ansible, GitLab CI/CD and APIs; drive Network as Code and model-driven programmability.
• Operate interconnected network environments such as iCN, DIN, IP2, GC, IPX and broadband consolidation, and secure data center management networks (firewall policies, IPsec).
• Provide MPLS-based inter-site connectivity, redundancy and integration with ICT and cloud-hosted services.
• Define network architectures, design guidelines, feasibility studies and KPIs, and carry out capacity planning.
• Handle complex incidents, root cause analysis and 2nd/3rd line support, including rotating on-call duties.
• Collaborate with development teams, infrastructure teams, SOC and external partners, manage vendors and document the network lifecycle.

Required profile

• Bachelor's or Master's degree in Computer Science, Telecommunications Engineering, Information Systems or a related field.
• More than five years of experience in network platform design and testing, with carrier-grade backbone and data center network engineering.
• Fluent English; knowledge of other EU languages is an asset.
• Strong teamwork, communication, problem-solving and analytical skills, flexibility to travel, and ability to handle confidential information.

Required skills

• Layer 2/3 networking: IPv4/IPv6, BGP, IS-IS/OSPF, QoS, VLAN/VXLAN, EVPN, MPLS, Cisco Nexus and Juniper QFX.
• Data center fabric, management networks, NAT, IPsec, VRF, and carrier-grade backbone hardware and circuits.
• Linux, OpenStack, SDN, container networking and cloud infrastructure.
• Python, REST and NETCONF APIs, Git, GitLab CI/CD, Ansible, JSON/YAML, telemetry and Network as Code.
• Preferred: CCNP, CCIE, JNCIP or JNCIE; Microsoft Office proficiency.

What we offer

• Flexible and remote work.
• Annual bonus, meal vouchers and private insurance.
• Cool offices in Thessaloniki and Athens, extra days off and travel opportunities.