Senior Engineer

• Bring your ‘you’ to TPG Telecom, and help us build meaningful relationships and support vibrant, connected communities. We’re better and bolder together.

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.

Could that be you?

Your opportunity:

You will be accountable for design, implementation and engineering support tasks in the TPG Mobile Voice Domain (IMS). You will ensure a close working relationship with the other engineering domains, the broader TPG organisation and the relevant vendors and suppliers. With a focus on IMS Core Elements.

Key responsibilities:

• Create, 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
• 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.
• 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
• All relevant mobile use cases including but not limited to:
• Mobile Calls
• Emergency Calling
• WIFI Calling
• Messaging Voicemail, SMS, MMS
• Inbound and Outbound Roaming
• You must possess the following skills:
• Detailed knowledge of IMS Call Flows and relevant protocols and 3GPP Specifications, such as SIGTRAN, MAP, CAP, ISUP SIP/RTP, Diameter
• Scripting, regular expression knowledge and detailed understanding of SMM rulesets
• Have relevant knowledge and skill in:
• Operational support systems such NetScout, Ericsson Analytics, Splunk
• Operating System and Virtualization technologies such as Redhat Linux (RHEL) and Open Stack

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. Experience with an Ericsson and/or Nokia Core equipment or IMS/VoLTE would be an advantage.
• 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
• Liaise with internal teams and vendor partners to deliver projects
• Strong proficiency in data analysis using tools such as Splunk and Elastic.
• Scripting knowledge using regular expressions.
• Experience with machine learning or AI-based systems highly desirable.
• Strong Linux System administration skills
• Excellent problem-solving, communication, and stakeholder management skills,
• Must be able to work both independently and collaboratively in a fast-paced environment, effectively managing multiple priorities while demonstrating strong teamwork and excellent communication skills when engaging with colleagues, management, and customers.
• Ability to communicate complex technical matters to non-technical stakeholders both internal and external

Ideally, you will also have:

• Ability to communicate complex technical matters to non-technical stakeholders both internal and external
• 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 and work with the relevant TPG stake holders to undertake:
• Assessments and provide feedback of new or changes to regulations
• Implementation of changes to ensure compliance to the regulations
• Be familiar with TPG policies and procedures, as well as completing any associated training, as communicated or made available on the intranet and our learning systems.
• Excellent written and verbal communication skills.
• Ability to work independently and in a team oriented, collaborative environment.

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 NBN 100 plan
• ‘Your Leave’ - an additional 4 days of leave to be used whenever you like - every year
• Access to TPG Learning Hub platform and internal development opportunities
• Access to Corporate Partner Discounts

Come join us and build a better future. Apply today.

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.

Please note we are taking a break over the holiday season from the 19^th December 2025 will return on 5^th January 2026. We will work through applications on our return.

#LI-Hybrid #LI-RS1 IND2