The Senior Infrastructure Engineer plays a critical role in managing and maintaining Access4’s backend environments. The primary goal of this role is to ensure 99.999% system uptime while driving continuous improvement across all system functions and components.

The Role

The Senior Infrastructure Engineer plays a critical role in managing and maintaining Access4’s backend environments. The primary goal of this role is to ensure 99.999% system uptime while driving continuous improvement across all system functions and components.

Key Responsibilities

- Perform daily maintenance and upkeep of backend systems.

- Drive constant improvements and innovations to strengthen system resilience.

- Act as a Subject Matter Expert (SME) to the engineering team and wider Access4 organisation, providing expert advice and solutions.

- Contribute to the engineering and R&D; functions to support the company’s strategic goals.

- Serve as the on-call contact for after-hours events and system emergencies.

About You

You are a proactive professional with a genuine passion for solving complex infrastructure challenges. You thrive in a collaborative environment, where sharing knowledge and supporting your team is second nature.

In high-pressure situations, you remain calm, focused, and solution-oriented, ensuring stability and continuity in critical systems. You bring strong organisational skills and a disciplined approach to managing both day-to-day tasks and long-term projects, consistently delivering high-quality outcomes.

Qualifications & Experience

- Bachelor’s degree in IT or a related field.

- Full working rights in Australia (no sponsorship available).

- 5+ years’ experience in Linux administration, including kernel and module-level expertise.

- 5+ years’ experience managing on-premises environments.





- 3+ years’ experience with Docker or other containerisation technologies.

- 3+ years’ experience with Ansible or similar automation tools.

- 3+ years’ experience developing in Python (additional programming languages highly regarded).

- 3+ years’ experience with virtualisation technologies.

- Strong knowledge of TCP/IP network stacks and monitoring systems.

- Experience with database administration (MySQL, PostgreSQL, or similar) preferred.

- Knowledge of VoIP technologies (SIP) desirable.

- Excellent problem-solving and analytical abilities.

- Strong written and verbal communication skills.

- Organised, methodical, and disciplined approach to operations and project delivery.

- Proficiency in the tools and technologies listed above.

Attributes

- Proactive mindset with a passion for solving complex problems.

- Collaborative and knowledge-sharing approach to teamwork.

- Calm and effective under pressure.

- Highly organised and disciplined in managing projects and tasks.

About Access4

Access4 is a leading global provider of unified communications and SaaS solutions, empowering our partners and customers across multiple regions with innovative, scalable, and secure technology. Our award-winning SASBOSS™ platform is at the core of what we do — enabling growth, efficiency, and exceptional experiences.

As we continue to expand globally, we are seeking a visionary Head of Platform to lead the strategic direction, development, and operational excellence of our platform.

Why Join Us?

At Access4, you’ll play a pivotal role in shaping the future of our global platform. You’ll be part of a dynamic, innovative, and supportive culture, working with talented teams across multiple regions. We’re committed to professional growth, continuous learning, and creating an setting where innovation thrives.

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📌 Senior Infrastructure Engineer (Williamstown)
🏢 Access4
📍 Williamstown