Senior Engineer - Mobile Voice

TPG Telecom; Sydney; Hybrid; AUD 120,000 - 180,000; Full time

Benefits offered by this job

Stay Connected Mobile

Stay Connected NBN

Your Leave

TPG Learning Hub access

Corporate Partner Discounts

Job summary

TPG Telecom is seeking a Senior Engineer - Mobile Voice to design, implement, and support the IMS-focused Mobile Core network. You will collaborate with internal teams, external vendors and partners to deliver secure, scalable voice services across the network.

The role demands strong IMS/VoLTE knowledge, 5+ years in mobile core networks, and expertise with Linux, scripting, and data analysis tools. A flexible hybrid working arrangement is offered, with opportunities to contribute to

Qualifications

• Bachelor’s degree in computer science, telecommunications or engineering.
• 5+ years in mobile core network delivery or support.
• Strong knowledge of IMS call flows and 3GPP specs (SIP/RTP, SIGTRAN, Diameter).

Responsibilities

• Design, implementation and engineering support tasks in the Mobile Voice Domain (IMS).
• Manage and deliver system changes including software upgrades and security patching.
• Support with SME knowledge in Mobile Voice domain; focus on IMS Core, MTAS, SBG, CSCF, IP WORKS, MRS, STP, SCP, DRA.
• Perform in both test and production environments; drive projects to completion.
• Create and update solution documentation, high/ detailed designs, requirements, and test plans.

Skills

Mobile core design

IMS/SIGTRAN/Diameter

Linux administration

Regex scripting

Data analysis (Splunk/Elastic)

Education

Bachelor’s degree in Computer Science, Telecommunications, or Engineering

Tools

Ericsson Core equipment

Nokia Core equipment

IMS/VoLTE experience

Job description

At TPG, we continually explore emerging technologies to deliver the best network services and solutions to our customers. As a Senior Engineer - Mobile Voice, you will be responsible for the design, implementation, and support of the TPG Mobile Network, with a key focus on the IMS domain. In this role, you will collaborate with both internal and external stakeholders, including TPG technology teams, the wider TPG organisation, and relevant external vendors and partners.

Your Opportunity

At TPG, we continually explore emerging technologies to deliver the best network services and solutions to our customers. As a Senior Engineer - Mobile Voice, you will be responsible for the design, implementation, and support of the TPG Mobile Network, with a key focus on the IMS domain. In this role, you will collaborate with both internal and external stakeholders, including TPG technology teams, the wider TPG organisation, and relevant external vendors and partners.

JOB DESCRIPTION

At TPG, we continually explore emerging technologies to deliver the best network services and solutions to our customers. As a Senior Engineer - Mobile Voice, you will be responsible for the design, implementation, and support of the TPG Mobile Network, with a key focus on the IMS domain. In this role, you will collaborate with both internal and external stakeholders, including TPG technology teams, the wider TPG organisation, and relevant external vendors and partners.

You’ll Make Impact By

• Design, implementation and engineering support tasks in the TPG Mobile Voice Domain (IMS).
• Manage and deliver system changes including software upgrades, security patching and configuration needed to update, maintain and keep secure the Mobile Core systems and architectures
• Support TPG with subject matter knowledge in the Mobile Voice Engineer Voice and Messaging Domain’s with a key focus on the following network systems: IMS Core, MTAS, SBG, CSCF, IP WORKS, AFG, EMM, MRS (MGW), STP, SCP, DRA, Including legacy MSC and MGW
• Perform in both test (model) and production environments
• Drive allocated projects to completion
• Design changes
• Execution and review of test cases
• Implementation/testing of changes
• Submission of designs and implementations to review boards
• Peer reviews of designs and implementations
• Completion of operational readiness activities and handover to operations
• Management all aspects of small to medium deliveries including raising of CR’s, coordination with other teams, scheduling of work.
• Create and Update: Solution Documentation, High Level Designs, Detailed Designs, Requirements documentation, Configuration/Data Fill, Implementation Plans including method of procedures (MOP), Test plans and cases, Specifications
  

What You’ll Bring

• Bachelor’s degree in computer science or Telecommunications or Engineering or closely related discipline
• 5 or more years of relevant experience of mobile core network delivery and/or support.
• Proven design and implementation experience in a Mobile Voice Core environment.
• Detailed knowledge of IMS Call Flows and relevant protocols and 3GPP Specifications, such as SIGTRAN, MAP, CAP, ISUP SIP/RTP, Diameter
• Advanced knowledge of Mobile Core Network architecture, traffic and signalling flows, including International and National Roaming Architectures
• Be familiar with relevant Australian Government regulation and codes related to the Mobile Networks
• Strong proficiency in data analysis using tools such as Splunk and Elastic.
• Strong Linux System administration skills
• Scripting knowledge using regular expressions and detailed understanding of SMM rulesets .

Ideally, You Will Also Have

• Experience with an Ericsson and/or Nokia Core equipment or IMS/VoLTE would be an advantage.
• Experience with machine learning or AI-based systems highly desirable.

What’s in it for you?

• Flexible hybrid way of working (from home and office)
• ‘Stay Connected Mobile’ – Access to a free mobile plan
• ‘Stay Connected NBN’ – Access to a free, high‑speed NBN plan (up to 500 Mbps)
• ‘Your Leave’ - additional leave to be used whenever you like - every year
• Access to TPG Learning Hub platform and internal development opportunities
• Access to Corporate Partner Discounts

Don’t meet every single requirement? That’s OK! At TPG Telecom, we’re all about creating an accessible workplace where everybody feels safe to bring their authentic self to work - regardless of background. If you think this role is a great fit for you but some of the qualifications don’t align with your experience, we still encourage you to apply - you might just be the perfect candidate for a similar role with us! Learn more about life at TPG Telecom here.

TPG Telecom also acknowledges the Gadigal People of the Eora Nation as the Traditional Custodians of lands and waterways where this office can be found in Barangaroo.

Our Talent Acquisition Team and Hiring Managers kindly request no unsolicited resumes or approaches from Recruitment Agencies. TPG Telecom is not responsible for any fees related to unsolicited resumes.

About Us

TPG Telecom started with a belief that we can make things better for Australians. We believe in the power of meaningful relationships to support vibrant, connected communities where everyone belongs. It’s our why; our reason to exist. Now, we’re proud to be one of Australia’s leading mobile and internet providers. We’re not just redefining telco, we’re changing its course. And you play a role in that. A big one. The opportunities are plenty for those who are ready to accept the challenge.

About The Team

Our Technology team builds and evolves the networks and platforms that keep millions of Australians connected every day. From mobile and fixed networks to digital platforms and data, you’ll work at the forefront of innovation solving complex challenges and helping shape the future of connectivity.