Senior Network Engineer - Signalling Core

Optus is an Australian telecommunications company, delivering more than 11 million services to our customers every day across mobile, broadband and digital solutions. 

The Senior Network Engineer - Signalling Core is a hands‑on technical specialist responsible for designing and delivering signalling core network solutions from initial scoping through to production implementation. The role provides strong technical leadership by producing and governing high‑quality network designs, collaborating with peers and vendors, and ensuring solutions balance technical excellence with operational and commercial requirements.

Your day to day will consist of

• Lead technical design and delivery for signalling core projects, covering scoping, high‑level and detailed design, testing, implementation, and operational handover.
• Produce, review, and approve high‑quality network design documentation with strong technical governance.
• Independently develop network solutions aligned to product and business requirements.
• Prepare change management documentation and perform configuration and deployment on production network devices.
• Provide Tier 3 operational support, including fault resolution, maintenance, and lab‑based testing and validation.
• Define and maintain signalling core network standards, best practices, and contribute to automation and innovation initiatives.
• Act as a trusted technical expert, engaging internal stakeholders and vendors while delivering clear technical communication and leadership.

What makes you perfect for the role

• Minimum 6 years’ experience in telecommunications, including at least 2 years in a senior Signalling Core design role.
• Strong hands‑on experience across Signalling Core and Packet Core network environments.
• Solid knowledge of signalling and transport technologies including Diameter, SS7, SCTP, and IP routing and switching.
• Proven experience designing, implementing, and supporting Signalling Core architectures and solutions.
• Experience with network testing tools, methodologies, monitoring, and management platforms, with sound API knowledge.
• Familiarity with Ericsson (cpDRA/csDRA/DEA), Oracle (STP) Signalling solutions, and automation tools such as Ansible and GitLab pipelines.
• Excellent technical documentation, communication, and stakeholder engagement skills, with the ability to explain complex concepts to technical and non‑technical audiences.

What’s in it for you?

• Competitive remuneration and employee discounts. Make life easier (and more affordable) with $80 monthly credit and 25% off Optus products and unique shopping discounts with our retail partners.
• Competitive leave policies, including additional 'Connected’ days to focus on culture, family, health, community, or whatever’s important to you.
• We support growing families with inclusive, carer-neutral paid Parental Leave of up to 16 weeks.
• Direct your own development and build future-ready skills with Optus U’s industry-focused micro-credentials, developed with La Trobe and Macquarie Universities.
• Build meaningful connections through employee-led networks and diversity initiatives including Culture Connect, Elevate Women, Disability Network and Express Yourself (LGBTQIA+).
• Put your wellbeing first with free access to counselling and support services, 24/7 — in-person, by phone, SMS, or video.

At Optus, we are strengthened by others and that means valuing diversity and saying ‘yes’ to embracing individual differences. We are committed to ensuring that our application process provides an equal employment opportunity to all job seekers, including individuals from diverse gender, cultural and linguistic backgrounds, individuals with a disability, individuals identifying as being part of the LGBTQIA+ community, individuals who may have served in the armed forces or who identify as Aboriginal and/or Torres Strait Islander. We also want to do our best to make our recruitment process inclusive. If you require any adjustments or accessibility support to participate fairly and equitably in the recruitment process, please email AccessibleRecruitment@optus.com.au or call 1800 309 170. We're here to help.

For more information on Diversity, Inclusion & Belonging at Optus, please visit https://www.optus.com.au/about/inclusion-diversity