Job Description

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.

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Key Responsibilities

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Perform daily maintenance and upkeep of backend systems.

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Drive constant improvements and innovations to strengthen system resilience.

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

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

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

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About You

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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.

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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.

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Qualifications & Experience

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Bachelor's degree in IT or a related field.

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Full working rights in Australia (no sponsorship available).

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

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5+ years' experience managing on-premises environments.

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3+ years' experience with Docker or other containerisation technologies.

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3+ years' experience with Ansible or similar automation tools.

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

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3+ years' experience with virtualisation technologies.

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

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Experience with database administration (MySQL, PostgreSQL,



or similar) preferred.

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Knowledge of VoIP technologies (SIP) desirable.

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Excellent problem-solving and analytical abilities.

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Strong written and verbal communication skills.

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

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Proficiency in the tools and technologies listed above.

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Attributes

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Proactive mindset with a passion for solving complex problems.

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Collaborative and knowledge-sharing approach to teamwork.

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Calm and effective under pressure.

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Highly organised and disciplined in managing projects and tasks.

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About Access4

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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 SASBOSSTM platform is at the core of what we do — enabling growth, efficiency, and exceptional experiences.

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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.

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Why Join Us?

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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 workplace where innovation thrives.

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Your application will include the following questions:

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- How would you rate your knowledge of TCP/IP network stacks and monitoring systems?
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- Are you available and willing to serve as the on-call contact for after-hours events and system emergencies as required for this role?
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- What is your current working rights status in Australia?
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- How would you rate your knowledge and experience with VoIP technologies, specifically SIP?
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- What is your highest level of education in Information Technology (IT) or a related field?
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- Salary Expectations?
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- Notice Period
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📌 Senior Infrastructure Engineer (Williamstown)
🏢 @
📍 Williamstown