Core Network Support Engineer – Voice Core (f/m/x)

Ing. Ernst Steiner High-Tech Personalbereitstellungs- und Technische Dienstleistungsges.m.b.H; Wien; Vor Ort; EUR 60.000 - 90.000; Vollzeit

Zusammenfassung

An international telecommunications vendor is seeking a technical representative in Vienna to support major mobile network operators. Responsibilities include operating and maintaining IMS and voice core elements, troubleshooting service issues, and collaborating with internal teams for effective solution delivery. Candidates should have a degree in Telecommunications or related fields along with strong knowledge of telecom protocols and EPC/5G Core technologies. This role requires excellent communication skills and the ability to thrive in dynamic environments.

Qualifikationen

• Degree in Telecommunications, IT, or a related field, or equivalent hands-on experience.
• Strong understanding of telecom protocols (GTP, Diameter, TCP/IP).
• Solid knowledge of EPC and/or 5G Core technologies.
• Linux systems familiarity and exposure to virtualization or cloud-native environments.

Aufgaben

• Act as a technical representative for telecom operators.
• Operate and maintain IMS and voice core elements.
• Investigate and resolve voice service issues.
• Analyze SIP and legacy signaling (SS7/MAP/ISUP) and support roaming as well as inter-operator voice connectivity.
• Perform system upgrades and configuration changes while monitoring KPIs and improving overall voice service performance.

Kenntnisse

Technical support for telecom operators

Voice core operations

Incident management and troubleshooting

Signaling and interconnect analysis

Change management

Communication skills

GTP/Diameter/TCPIP

Ausbildung

Degree in Telecommunications, IT, or related field

Equivalent hands-on experience in mobile core network environments

Tools

Linux systems

Cloud environments

Jobbeschreibung

Ready to ensure stable and high-quality voice services and act as a key technical interface between operators and vendor teams? Then we would love to hear from you!

The enterprise is a leading international telecommunications vendor, providing innovative solutions for voice and core network services. Join the international Core Network team (10 members) and take on a vendor-facing role, supporting major mobile network operators in Austria in the operation, troubleshooting, and continuous improvement of their Voice Core and IMS environments.

• Vendor Interface & Technical Support: Act as the technical representative for telecom operators and coordinate with internal Level 3 / R&D teams for issue resolution.
• Voice Core Operations & Maintenance: Operate and maintain IMS and voice core elements (e.g., CSCF, HSS/UDM, SBC, MGW, TAS) including VoLTE/VoNR services in virtualized environments.
• Incident Management & Troubleshooting: Investigate and resolve voice service issues (e.g., SIP signaling, call setup failures, interconnect issues) to ensure high service availability.
• Signaling & Interconnect Analysis: Analyze SIP and legacy signaling (SS7/MAP/ISUP) and support roaming as well as inter-operator voice connectivity.
• Change Management & Service Quality: Perform system upgrades and configuration changes while monitoring KPIs and improving overall voice service performance.
• Education & Experience: Degree in Telecommunications, IT, or a related field, or equivalent hands‑on experience in mobile core network environments.
• Packet Core Expertise: Solid knowledge of EPC and/or 5G Core technologies (e.g., MME, SGW/PGW, AMF, SMF, UPF, PCRF/PCF, ePDG).
• Protocols & Troubleshooting: Strong understanding of telecom protocols (GTP, Diameter, TCP/IP) and experience in troubleshooting mobile data services.
• Linux & Cloud Fundamentals: Familiarity with Linux systems and exposure to virtualization or cloud‑native environments.
• Communication & Ownership: Team‑oriented mindset with strong communication skills, proactive approach, and ability to work under pressure in dynamic environments.