NetOps Engineer

Giesecke+Devrient is a global company that offers security technologies, both in the physical and digital world. Every day, billions of people benefit from G+D innovations in their personal and business lives. We develop, manufacture, and distribute products and solutions for the safeguarding of payment processes, identities, connectivity, and data. At G+D Mobile Security, a world leader in secure telecommunications systems, we are looking for a NetOps Engineer to join our Network Operations team. You'll deploy and support mobile core and IP network services, ensuring availability and performance across critical infrastructures. Responsibilities

• Operate and maintain IP and mobile packet core networks.
• Manage incidents, service requests, changes and problems.
• Support customer projects, deployments, and network integration.
• Conduct troubleshooting and escalate to R&D when required.
• Maintain accurate documentation and ensure SLA compliance.
• Collaborate with NOC and cross-functional teams globally.
• Support reporting, monitoring, and service improvement efforts.

• Understanding of mobile roaming architecture including the role of serving networks, signalling interconnect and GRX / IPX providers.

• Knowledge of 2G / 3G networking, 4G LTE and 5G technologies.

• Experience of working with a range of telecoms technologies.

• Understanding / experience of GRX and IPX networks.

• Technical knowledge of maintaining on-premises equipment and cloud services in areas such as virtual machines, storage, network and security.

• Experience in deploying and maintaining production infrastructure to achieve high levels of uptime and reliability.

• Understanding of Networking Concepts and Network Architectures using Routers, Switches, Firewalls and load balancer. Technical knowledgeProtocols:

• Diameter LTE Signalling (S6a, S5, S8)

• RADIUS

• Diameter Gy/Gx

• GTP v1/v2

• SIGTRAN

• SCCP

• SIP

• TCP/IP

• DNS

• DHCP Technology area:

• IP Routing and switching (Layer 2 & 3)

• BGP routing protocol

• IPSEC VPN

• Wireshark traces

• Firewall Platforms:

• Linux O/S

• MySQL and Postgres databases

• Virtualisation & Containerisation technologies, including Cloud (AWS, Azure),VMware, Docker

• DRA/STP, HSS/HLR, P-GW, OCS and PCRF platforms Your profile

• Degree in Computer Science, Telecommunications or related field.

• Experience in telecom network operations (IP, LTE/5G, roaming).

• Hands-on knowledge of IP networking, routing (BGP), VLANs, VPNs.

• Familiar with protocols: Diameter, GTP, RADIUS, SIGTRAN, TCP/IP.

• Skilled with Linux, MySQL/Postgres, Docker, VMware, AWS/Azure.

• Strong analytical and documentation skills.

• Culture and diversity: Join a people oriented environment with different nationalities and a great team spirit, flat hierarchies (everyone speaks to everyone). Equal Opportunity Employer and LGBT+ friendly.
• Global Collaboration: Work collaboratively with stakeholders around the globe.
• Career Development: Benefit from continuous training, coaching, and talent development programs.
• Social Benefits: flexible compensation (transport tickets, training, private insurance), etc.
• Work-Life Balance: Flexible working hours with the option for remote work (M-Th 8.30 - 17.30 and Fri 8.30 - 15.30; 3 days of remote work).
• Location: Sant Joan Despí (Barcelona), easy communication by public transport, or Sevilla Center.