Telcom Infrastructure Network Engineer

The Role
We are looking for a motivated
Telecom Infrastructure & Network Engineer
to join our Infrastructure & Network Engineering team.
Our team designs, operates and maintains the telecommunications connectivity, networks and infrastructure supporting Intellico’s business-critical messaging platform. We take responsibility for SMPP and SS7/SIGTRAN connectivity, data-center and inter-site networks, firewalls, virtualization, Linux systems and storage environments.
Your primary focus will be telecommunications connectivity and protocol-level troubleshooting. You will also contribute to network engineering and the operation of our physical and virtual infrastructure across multiple colocation sites.
You will work closely with the team to investigate incidents across telecom, network and infrastructure layers.
Key Responsibilities
Operate and maintain SMPP connectivity with customers, carriers and mobile network operators
Operate and maintain SS7 and SIGTRAN connectivity across external telecom partners
Provide L2 technical support for telecom connectivity, signalling and protocol-level incidents
Support onboarding, testing and activation of new SMPP and SS7/SIGTRAN interconnections and their configuration
Troubleshoot SMPP, SCTP, M3UA and related communication and session-establishment problems
Operate and maintain data-center, office and inter-site networks based on Cisco and related technologies
Manage Palo Alto firewalls, firewall policies, VPNs, VLANs, NAT and network segmentation
Support BGP routing, internet edge connectivity, IP address management and external partner connections
Monitor and troubleshoot routing, latency, packet loss, DNS, firewall and general connectivity issues using Wireshark and related tools
Operate Proxmox VE clusters, Linux virtual machines, Ceph and ZFS storage environments
Support physical servers, storage systems, hardware replacement, cabling, rack space and power connections at colocation sites
Provision, patch, monitor and troubleshoot Linux systems and core infrastructure services such as DNS, DHCP, NTP and certificates
Support backup, restore, high availability, disaster recovery, infrastructure documentation and the compensated on-call rotation
Requirements
Good understanding of TCP/IP networking and network communication
Practical experience with Linux systems and structured technical troubleshooting
Experience with Wireshark or comparable packet-analysis tools
Knowledge of SMPP and telecommunications messaging is a strong advantage
Knowledge of SS7, SIGTRAN, SCTP, M3UA or related protocols is an advantage
Experience with telecommunications, carrier connectivity or network operations is an advantage
Good understanding of switching, routing, VLANs, NAT, DNS and network segmentation
Experience with firewalls, VPNs and access-control concepts
Knowledge of Cisco, Palo Alto or comparable enterprise network technologies
Knowledge of BGP and internet edge routing is an advantage
Experience with virtualization platforms such as Proxmox, VMware or comparable technologies
Understanding of Ceph, ZFS or other storage technologies is an advantage
Experience with server hardware, Linux administration, monitoring, backup and high-availability concepts
Strong soft skills, including problem-solving, teamwork, ownership and communication
Education in IT, systems engineering, computer science or a related field, eg:
Informatiker/in EFZ, Fachrichtung Plattformentwicklung
ICT-System- und Netzwerktechniker/in mit eidg. Fachausweis
Cisco CCNA or a comparable networking qualification
A comparable technical or university qualification
Fluent in English, German is an advantage, resident in Switzerland
Practicalities
Location: Freienbach, Switzerland
Employment: Permanent, full-time position, 80%-100%
Working model: Primarily office-based, with up to two home-office days per week where operational responsibilities allow
Schedule: Normal working hours with participation in an on-call rotation
Travel: Occasional visits to other Intellico offices and colocation facilities
What We Offer
Technically challenging work across telecommunications, networking and infrastructure
Practical exposure to SMPP, SS7, SIGTRAN, IP networking, firewalls and Linux
The possibility to develop toward telecom engineering, network engineering or service operations
Meaningful responsibility in a small team without unnecessary organizational layers
High-quality technical equipment and a modern, comfortable office in Freienbach