Junior to Senior Levels | Mission Software Systems

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. Meaningful work is supported by benefits, flexibility and career pathways that help you balance professional development with life outside work.

Our benefits include:

- Flex Your Way: Options may include Life Days, part-time arrangements, job sharing and compressed hours.
- Wellbeing That Matters: Access to Headspace, MeQuilibrium and dedicated wellness support.
- Learn Without Limits: Access to more than 120,000 on-demand courses, as well as technical, project management, leadership and professional development opportunities.
- Work That Makes an Impact: Contribute to nationally significant projects and solve complex technical challenges.
- Build Your Future: Develop your technical expertise, broaden your experience or prepare for future leadership opportunities.

About the Team

You will join a collaborative engineering team that values integrity, inclusion, innovation, agility, shared ownership and commitment. The team works together to solve complex problems while staying connected to the customer environment, the purpose behind the work and the outcomes our solutions need to deliver.

Mission Software Systems brings together expertise across intelligence, software and cloud technologies to deliver end-to-end capability supporting the intelligence lifecycle. The team uses modern engineering practices and shared infrastructure to rapidly design, build,



test and deploy secure software across a range of environments, including cloud-based platforms.

The Opportunity

We are seeking Software Engineers across multiple levels, from junior engineers beginning their careers through to experienced senior engineers and technical leaders.

You will contribute to the design, development, integration and support of secure software solutions for defence and national security environments. The scope of your responsibilities will reflect your experience, technical capability and career goals.

This opportunity may suit you if you are:

- A junior software engineer seeking practical experience, structured technical support and exposure to mission-critical software projects.
- A mid-level software engineer ready to take ownership of software components, integrations and delivery outcomes.
- A senior software engineer capable of leading technical design, resolving complex engineering challenges and supporting the development of other engineers.

Depending on your level of experience, your responsibilities may include:

- Designing, developing, testing and maintaining software applications, services, APIs, integrations and supporting components.
- Translating customer and project requirements into practical technical designs and implementation tasks.
- Contributing to code reviews, design discussions, troubleshooting and performance optimisation.
- Developing secure, reliable and maintainable software using contemporary engineering practices.
- Supporting automated testing, CI/CD pipelines and deployment processes.
- Working with containerised and cloud-based development environments.
- Collaborating with systems, cloud, DevOps, security and project delivery specialists.
- Engaging with technical and non-technical stakeholders to understand requirements and communicate progress, risks and options.
- Using AI-enabled development tools responsibly to improve productivity, software quality and engineering efficiency.
- For more experienced applicants, providing technical direction, mentoring engineers and establishing standards that improve quality and consistency.

About You

You are a cooperative soft

📌 Software Engineers (Melbourne)
🏢 Leidos Australia
📍 Melbourne