Middleware Engineer

About Leidos Australia At Leidos Australia, our work goes beyond a job title. We design, build, operate and support the systems, services and capabilities that help protect and advance the Australian way of life. Backed by a global organisation of more than 40,000 people, our Australian team of around 2,000 has partnered with government, defence and national security customers for more than 30 years. We deliver mission-critical solutions where reliability, trust and purpose matter. Leidos is a destination for people who want their work to have purpose, their contribution to be recognised, and their career to grow without needing to fit a single mould. Meaningful work is supported by benefits, flexibility and career pathways that help you grow while balancing life outside work. This includes: Flex Your Way – Tailor work to your life with options including Life Days (up to 12 extra days off per year), part-time arrangements, job sharing, and compressed hours. Wellbeing That Matters – Free access to Headspace and MeQuilibrium, plus dedicated wellness spaces to support your mental, physical, and emotional wellbeing. Learn Without Limits – Access over 120,000 on-demand courses, alongside technical, project management, leadership, and professional development opportunities. Work That Makes an Impact – Contribute to nationally significant projects that matter, solve complex challenges, and accelerate your career through unique growth opportunities. Build Your Future – Whether you're deepening technical expertise or preparing for leadership, we'll invest in your development every step of the way. And Much More – These are just a few of the ways we invest in our people and help them thrive.

You’ll join a team where people work with integrity, inclusion, innovation, agility, collaboration and commitment. In practice, that means sharing ownership, solving complex problems together and staying connected to the customer context, the purpose behind the work and how each role contributes to meaningful outcomes. We deliver secure, resilient and innovative technology services that enable Defence enterprise and warfighting capabilities across multiple classified domains and networks. We provide world-class ICT operations and agile digital modernisation using advanced analytics, automation, hybrid cloud, DevSecOps, Infrastructure as Code, cybersecurity and AI to optimise highly complex, mission-critical environments.

We are seeking a Senior Middleware Engineer to implement, manage and optimise enterprise middleware platforms that enable reliable integration and communication between applications, databases, services and external systems. This role provides senior technical expertise across middleware infrastructure, application integration, APIs, messaging, web services, automation, security, performance and high availability. Working closely with application developers, integration engineers, database teams, infrastructure teams, architects, cybersecurity and business stakeholders, you will help deliver secure, resilient and scalable middleware services that support critical business outcomes.

Implement, configure, maintain and optimise enterprise middleware platforms, including application servers, integration platforms, API gateways, messaging technologies and related services. Design, support and improve secure application integration solutions using APIs, web services, messaging platforms, event-driven architectures and service interfaces. Lead complex troubleshooting, root cause analysis, performance tuning, upgrades, migrations, disaster recovery activities and platform modernisation initiatives. Develop and maintain automation, CI/CD pipelines, monitoring solutions, operational processes and infrastructure-as-code practices to improve service reliability and efficiency. Partner with application, infrastructure, architecture, cybersecurity and business teams to deliver