Senior Software Engineer

L3Harris Technologies; Fremantle; On-site; AUD 140,000 - 190,000; Full time

Job summary

L3Harris Australia (operating as Integrated Mission Systems Australia) seeks a Senior Software Engineer to lead development across modern stacks, mainly .NET and C/C++ for embedded and desktop platforms. You will work in lean teams on full lifecycle delivery—from requirements and architecture to design, implementation, testing, deployment and production support.

The role requires strong task planning, risk management, Git-based workflows, and DevSecOps toolchains, with solid customer engagement

Qualifications

• Engineering or CS degree or equivalent.
• Chartered Engineer (Engineers Australia) desirable.
• 7+ years in a Software Engineering role.
• Embedded/low-level (C++, C) experience.
• .NET desktop stack: .NET 8+, C#, WPF/WinUI 3, T-SQL, PowerShell, Blazor.
• Python experience.
• Experience developing for embedded platforms.

Responsibilities

• Lead SDLC activities from requirements to deployment.
• Define architecture and design software components.
• Deliver software work packages and conduct testing.
• Support production deployment and ongoing maintenance.
• Liaise with customers to refine scope and ensure quality.
• Occasional travel to customer locations for support.

Skills

Embedded/low-level C/C++

.NET desktop development

Python programming

Customer engagement

Education

Engineering or Computer Science degree

Chartered Engineer (Engineers Australia)

Tools

Git based SCM

DevSecOps toolchains/Pipelines

Visual Studio

GitHub

GitLab

Azure DevOps

Atlassian suite

Job description

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do.

L3Harris is the Trusted Disruptor in defense tech. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.

About us

L3Harris Technologies is an agile global aerospace and defence technology innovator, delivering end-to-end solutions that meet customers’ mission-critical needs. We provide advanced defence and commercial technologies across the air, land, sea, space and cyber domains.

L3Harris Australia (operating as Integrated Mission Systems Australia) has provided advanced technology solutions to the Australian Defence Force and commercial customers for over 25 years. As a government partner of choice, L3Harris brings speed, innovation and flawless execution together with our commitment to make the world safer and more secure.

Our values of Integrity, Excellence and Respect are at the core of everything we do and inspire our team members around the globe.

About the role

We are seeking a versatile Senior Software Engineer with experience across modern technology stacks, primarily .NET and C/C++ (Windows and Yocto Linux) for embedded and desktop platforms. The role is part of small lean delivery teams involving full lifecycle delivery—from requirements and architecture through design, implementation, testing, deployment, and ongoing production support. Knowledge in maritime and underwater technologies is a bonus.

The ideal candidate brings strong skills in task planning, technical risk management, and modern development practices, with hands-on experience in Git-based workflows and DevSecOps toolchains. Good skills in customer engagement and management are a must.

Essential Functions:

• Full Software Development Life Cycle (SDLC) management:
  • Requirements definition and management.
  • Lead software architecture and design activities.
  • Implement the scope of software work packages.
  • Execute testing to verify and validate the quality and appropriateness of the software.
  • Support the release and deployment of software into production environments (internal and remote).
  • Support and maintain software in production environments (internal and remote).
• Liaising with customers to refine scope and solution to meet requirements, cost, schedule and quality.
• Occasional travel to customer locations (domestic, offshore, and overseas) to provide engineering support.

Qualifications:

• Tertiary qualifications in an Engineering, Computer Science, or other relevant Discipline
• Suitable qualifications and experience to meet the requirements of Chartered Engineer (Engineers Australia)
• 7 years or more experience practicing in an Engineering position within the Software Engineering discipline (preferred).
• Experience with modern software technologies including:
  • Embedded/low-level (e.g. C++, C)
  • .NET desktop (e.g. .NET 8+, C#, WPF/WinUI 3, T-SQL, PowerShell, Blazor)
  • Python
• Experience in developing for embedded platforms.
• Must be an Australian Citizen.
• Ability to hold an Australian Defence Clearance to a NEGATIVE VETTING 1 security level.
• Meet the requirements for access to ITAR controlled technology and data.

Preferred Additional Skills:

• Experience in engineering development methodologies
• Have a good Technical Risk Management approach
• Experience with modern software tooling such as:
  • Git based SCM
  • DevSecOps toolchains/pipelines (e.g. GitHub, GitLab, Atlassian suite, Azure DevOps, etc)
  • Visual Studio
• Working knowledge of maritime environment and underwater acoustics.
• Working knowledge of digital signal processing and digital communication fundamentals: modulation, demodulation, and channel estimation.
• Experience designing or implementing acoustic or RF bandwidth-constrained communication waveforms.
• Experience processing experimental data, debugging field trials, and turning test findings into algorithm or software improvements.

As an equal opportunities employer, L3Harris is committed to the equal treatment of all current and prospective employees and does not condone discrimination on the basis of age, disability, sex, sexual orientation, pregnancy and maternity, race or ethnicity, religion or belief, gender identity, or marriage and civil partnership.