About the Role

We are seeking an experienced Senior Site Reliability Engineer (SRE) to design, build, and operate next-generation software delivery and sustainment platforms.

This role is central to enabling the rapid, secure, and resilient delivery of complex software systems across cloud, on-premise, and hybrid environments. You will work across the full stack—from infrastructure and operating systems through to orchestration and application platforms—while acting as a technical leader and mentor within multidisciplinary engineering teams.

The role suits someone who enjoys deep technical ownership, complex systems, and operating in environments where reliability directly supports national capability.

The Successful Candidate

You will be a senior-level engineer with solid experience operating complex software systems at scale.

Required experience and skills include:
Bachelor’s degree in Computer Science, Software Engineering, or equivalent practical experience
Proven experience in a senior SRE, platform, or infrastructure engineering role
Strong background designing and operating horizontally scaled cloud systems
Experience working across the full software lifecycle: design, implementation, operation, and sustainment




Ability to take end-to-end ownership of services, including technical leadership and coordination
Strong problem-solving skills and ability to operate in high-stakes environments
Eligibility to obtain and maintain an Australian Government Security Clearance
Experience developing cloud-native services in C++, Rust, Python, or Go
Experience with NixOS and the Nix programming language
Strong understanding of systems programming concepts (concurrency, optimisation, performance)
Strong networking fundamentals in cloud and hybrid environments
Deep experience deploying and operating Kubernetes clusters
Interest in progressing into technical leadership or engineering management roles

What’s on offer?
Long term role working on cutting-edge, defence-grade technology
ACT -based position within a highly skilled, mission-focused engineering team
Market-competitive salary package (aligned to senior-level market rates)
Long-term growth opportunities across principal engineering or leadership pathways
Opportunity to work on systems of national and strategic importance
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📌 Senior Site Reliability Engineer City Of Sydney
🏢 Whizdom
📍 City of Sydney