Infrastructure & Security Engineer – Payments Tech

Quest Payment Systems Pty Ltd; Melbourne; On-site; AUD 90,000 - 120,000; Full time

Job summary

Quest Payment Systems Pty Ltd in Melbourne is seeking an experienced Technical Services Engineer to join our team. In this hands-on role, you will support, maintain and improve our IT infrastructure and production environments, ensuring the availability, security and reliability of business-critical systems.

This full-time, on-site position involves collaborating with internal teams, deploying technical solutions, conducting PoCs, and driving continuous improvement.

Qualifications

• At least three years of experience in a systems or infrastructure engineering role.

Responsibilities

• Maintain, configure and support Windows Server, Active Directory, Microsoft 365 and on-premises infrastructure.
• Monitor, troubleshoot and resolve infrastructure, system and application issues.
• Perform system maintenance, patching, upgrades and deployments.
• Participate in planning and delivering infrastructure projects.
• Manage endpoint protection, vulnerability remediation, backup and recovery processes.

Skills

Windows Server

Active Directory

Microsoft 365

Infrastructure troubleshooting

Linux

IAM

SSO

MFA

Backup & DR

Networking

Automation

Containerisation

Docker

Kubernetes

AWS

GCP

VMware

Tools

Docker

Kubernetes

VMware

Job description

We are seeking an experienced Technical Services Engineer to join our team at a leading Australian payments FinTech company. In this hands-on role, you will support, maintain and improve our IT infrastructure and production environments, ensuring the availability, security and reliability of business-critical systems. Working across a diverse technology environment, you will collaborate with internal teams to troubleshoot complex issues, deliver infrastructure projects, implement technical solutions and drive continuous improvement. This is a full-time, on-site position. As we operate business-critical payment systems, occasional after-hours work will be required for scheduled maintenance, system upgrades and incident response.

Key responsibilities

Maintain, configure and support Windows Server, Active Directory, Microsoft 365 and on-premises infrastructure.

Monitor, troubleshoot and resolve infrastructure, system and application issues.

Perform system maintenance, patching, upgrades and application deployments.

Participate in planning and delivering infrastructure projects, including migrations, upgrades and technology improvements.

Manage and support endpoint protection, vulnerability remediation, backup and recovery processes, and identity and access management solutions.

Implement and maintain security controls in accordance with industry best practices.

Work closely with internal stakeholders to understand technical requirements and deliver practical solutions.

Research and evaluate new technologies, conduct proofs of concept (PoCs), and implement technical solutions in production environments.

Develop and maintain accurate technical documentation, procedures and system configurations.

Identify opportunities for automation, operational improvements and increased system reliability.

About you

At least three years' experience in a systems engineering, infrastructure engineering or similar technical role.

Strong hands-on experience with Windows Server (2016–2025), Windows 10/11 and Active Directory Domain Services.

Experience administering Microsoft 365 environments.

Experience supporting virtualised infrastructure, such as VMware or equivalent hypervisor technologies.

Working knowledge of Linux operating systems.

Experience with endpoint protection technologies (EDR/XDR), vulnerability management and system patching.

Understanding of identity and access management, including SSO and MFA.

Knowledge of backup, recovery and disaster recovery processes.

Familiarity with email security protocols, including SPF, DKIM and DMARC.

Understanding of networking fundamentals and infrastructure troubleshooting.

Familiarity with containerisation technologies.

Ability to work independently, prioritise competing tasks and troubleshoot complex technical issues.

Strong communication and documentation skills.

A systematic approach to problem-solving, with an interest in automation, continuous improvement and learning new technologies.

Highly Regarded Skills

Understanding of AWS and GCP.

Hands on experience with Docker and Kubernetes.

Relevant industry certifications (Microsoft, AWS, Cisco).

Understanding of compliance frameworks such as PCI-DSS, ISO 27001, SOC 2 or CPS 230.

Why Join Us?

You will have the opportunity to work across a diverse technology environment supporting critical payment infrastructure.

This is a hands-on role where you can take ownership of technical challenges, contribute to infrastructure improvements and develop your skills across systems, security, cloud and application operations.

If you enjoy solving complex technical problems, learning new technologies and making a meaningful contribution to the reliability of critical systems, we'd love to hear from you.

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