Senior Mobile Core Signalling Lead Architect

Singtel Group; Sydney; Hybrid; AUD 150,000 - 190,000; Full time

Benefits offered by this job

Competitive remuneration

Employee discounts on Optus products

Flexible work arrangements (3 days in-

On-site facilities and services

Parental Leave (up to 16 weeks)

Employee networks & inclusion

Job summary

Optus in Sydney is seeking a Senior Technical Specialist to lead engineering in the Mobile Core Signalling domain. You will design robust, secure, and scalable 3G/4G/5G signalling solutions and align platform roadmaps with Optus objectives to keep our network high-performing and future-ready.

You will lead the domain’s evolution, define architecture and roadmaps, and collaborate with vendors while ensuring compliance with ICT, information, and cyber security standards.

Qualifications

• Subject-matter expertise in the Mobile Core Signalling domain.
• Strong technical proficiency across platforms, tools, architectures, and best practices.
• Excellent analytical and problem-solving abilities to convert requirements into robust designs.
• Clear communication and collaboration with stakeholders, platform owners, and product engineering managers.
• Demonstrated leadership to mentor teams and drive buy-in across the organisation.
• Experience mapping corporate finance forecasts, service costings, and product roadmaps.

Responsibilities

• Develop and design technology solutions within the Mobile Core Signalling domain aligned with Networks target architecture and business needs.
• Define future-state architecture, roadmaps, and scalable development guidelines to guide team decisions.
• Create platform documentation covering system integration, data flows, and interfaces to OSS/BSS and upstream IT systems.
• Own the signalling platform lifecycle from design to implementation, drive roadmaps and upgrades for reliability.
• Evaluate emerging technologies, assess their applicability, and collaborate with vendors to drive innovation.
• Ensure all solutions comply with Optus and industry ICT, information, and cyber security standards.

Skills

Mobile Core Signalling

Technical leadership

Analytical skills

Communication skills

Stakeholder management

Commercial & ops alignment

Job description

Optus in Sydney is seeking a Senior Technical Specialist to lead engineering in the Mobile Core Signalling domain. You will design robust, secure, and scalable 3G/4G/5G signalling solutions and align platform roadmaps with Optus objectives to keep our network high-performing and future-ready.

You will lead the domain’s evolution, define architecture and roadmaps, and collaborate with vendors while ensuring compliance with ICT, information, and cyber security standards.