Senior Network Engineer (Voice & IPX)

As a Senior Network Engineer (Voice & IPX), you'll help shape the future of Telstra's international mobility, voice, and interconnect capabilities.

This individual contributor role is responsible for ensuring Telstra's international network delivers a reliable, high-quality experience for interconnect and roaming partners, suppliers, and customers. You'll contribute to the analysis, architecture, design, development, deployment, and optimisation of network technologies, with a strong focus on interoperability across multiple network domains.

You'll drive technology evolution across Telstra's International Core Voice, IPX, and Mobility/Roaming platforms, delivering scalable and resilient solutions supporting international voice, mobility and roaming services, signalling platforms, and specialised international network services.

Responsibilities

• Design, develop, deploy, and optimise solutions across International Voice, IPX, Mobility, and Roaming networks.
• Drive network transformation through NFV, cloud adoption, automation, and software-defined networking.
• Deliver secure, scalable, high-performing interconnect and roaming solutions.
• Provide specialist expertise across signalling, voice, IPX, roaming, and interconnect, ensuring integration with adjacent network technologies.
• Support Cisco and Juniper switching and routing infrastructure across the International Voice and IPX networks.
• Manage Check Point firewalls and network security controls, ensuring compliance with Telstra security policies and standards.
• Manage deployment, configuration, and lifecycle of Oracle DSR, Ribbon SBC and PSX, and A2P SMS platforms.
• Manage and support the infrastructure, virtualisation, and orchestration layers hosting International platforms and applications.
• Collaborate with internal stakeholders, international partners, customers, and vendors to deliver strategic network capabilities.
• Lead troubleshooting and resolution of complex network issues to maintain service availability and customer experience.
• Manage hardware and software currency, security patching, resiliency assessments, and sustainability requirements.
• Produce and review High Level Designs, test plans, and Methods of Procedure, and execute changes under Telstra change governance.
• Contribute to network strategy, technology roadmaps, architecture standards, and continuous improvement.

What We Offer

• Performance-related pay
• Access to thousands of learning programs so you can level-up
• Global presence across 22 countries; opportunities to work where we do business.
• Purchased annual leave scheme
• Additional Telstra day off
• Additional 30% off Telstra products and services
• Toolkit provided (laptop + mobile phone + plan paid for)

Your Technical Expertise

• Strong knowledge and experience across Voice & IPX, protocols, IP & Security, virtualisation & orchestration, network domains, monitoring & assurance, and lifecycle management.

About You

• Bachelor’s degree in Telecommunications Engineering or a related discipline, or equivalent relevant technical qualifications.
• Minimum 8 years’ relevant experience in voice, signalling, IPX, and/or mobility/roaming network engineering.
• Strong understanding of international Voice, IPX, Mobility/Roaming, and carrier interconnect requirements.
• Hands-on experience with Oracle DSR, Ribbon SBC and PSX, and A2P SMS platforms, including deployment and management.
• Experience configuring and supporting Cisco and Juniper switches and routers in carrier-grade environments.
• Experience managing Check Point firewalls and network security controls.
• Sound knowledge of virtualisation, NFV, cloud-native architectures, and orchestration platforms.
• Sound understanding of SIP, Diameter, SS7/SIGTRAN, and IP networking protocols.
• Experience as a technical lead on medium to large engineering projects, preferably across voice or mobility networks.
• Ability to review technical solutions, conduct impact analysis, and plan controlled implementations.
• Strong analytical, problem-solving, and root-cause analysis skills.
• Excellent interpersonal, vendor, and stakeholder management skills.
• Certifications such as CCNP, JNCIP, Check Point CCSA/CCSE, or Red Hat will be highly regarded.