About Maincode
Maincode makes Matilda, an Australian-made AI stack we own end to end, from tin to token. We own and operate our own infrastructure here in Australia, we train and maintain our own frontier models, and we run multiple surfaces on top of them, including chat, coding and API. Everything we ship is built on capability we control ourselves.
We are hiring someone who cares about that. You should be passionate about Australian-made AI, a builder first, and keen to work directly with customers to help them move forward on the Matilda stack.
The Role
You will be Maincode's senior technical presence with customers in Melbourne, including departments across the Justice and Community Safety (JACS) portfolio.
This is a forward-deployed engineering role. You will embed with customer teams, get to grips with their hardest data problems, and design, adapt and deploy the Matilda stack to solve them. You will be the technical face of Maincode in the Justice and Emergency Services (J&ES) community: credible in a room of senior technical staff, able to prototype in days, and rigorous enough to ship working systems into classified environments.
What You Will Do
Embed with Victorian J&ES customers to find where Matilda can deliver real mission outcomes, and turn loosely defined requirements into concrete technical plans.
Design, fine-tune, evaluate and deploy systems on the Matilda stack against customer data, including in on-premises, air-gapped and classified environments.
Own delivery end to end, from data pipelines and fine-tuning through retrieval-augmented generation, evaluation, MLOps and hardening to relevant Government security standards.
Brief confidently at every level, from working engineers through to executives, and write architecture papers and evaluation reports that stand up to scrutiny.
Bring what you learn in the field back to the team that trains the models, so customer experience directly shapes the next version of the stack.
What You Will Bring
Essential
Must hold an active AGSVA NV1 (or higher) security clearance and be willing to undergo Victoria Police organizational suitability vetting.
Deep hands-on experience in data science and ML engineering, with strong Python, modern ML stacks such as PyTorch, JAX and the Hugging Face ecosystem, and solid software engineering fundamentals.
Demonstrated experience deploying ML systems in secure government, defence or intelligence environments, including on-premises and air-gapped infrastructure.
Working knowledge of the Victorian Protective Data Security Framework (VPDSF), the ISM, the Protective Security Policy Framework (PSPF), and data classification and handling requirements.
Excellent judgement and discretion, and the ability to operate autonomously inside customer environments.
The ability to explain complex ML concepts crisply, and to write exceptionally well.
Highly Regarded
Prior experience within State Law Enforcement, Public Safety, or Federal Intelligence (e.g., VicPol, ASIO, ASD, or Defence S&T), ideally in a data science, technical, or analytic role.
Hands-on experience with large language models: fine-tuning, evaluation, retrieval-augmented generation, and their known failure modes.
Familiarity with intelligence-adjacent data workflows such as entity resolution, geospatial analysis, OSINT, graph analytics, or tradecraft tooling.
Solutions architecture or technical pre-sales experience in a commercial setting.
Eligibility
This position requires an active AGSVA NV1 (or higher) clearance. Due to clearance eligibility requirements, applicants must be Australian citizens. You will be required to consent to AGSVA revalidation, and to obtain and maintain customer-specific briefings and accesses as required.
Details
Location: Melbourne, VIC. Regular work from customer facilities and secure sites, with some work from Maincode offices.
Type: Full-time, permanent.
Remuneration: Negotiable based on experience, plus super and equity.
Who Thrives Here
Builders who want to spend time with customers, and customer people who actually build. If you care about Australian-made AI and you would rather spend your week deploying systems with agencies than talking about them, you will do well here.
Skills Required
- Active AGSVA NV1 or higher security clearance
- Australian citizenship
- Willingness to undergo Victoria Police organizational suitability vetting
- Deep hands-on experience in data science and machine learning engineering
- Strong Python skills
- Experience with modern ML stacks such as PyTorch, JAX, and Hugging Face
- Solid software engineering fundamentals
- Experience deploying ML systems in secure government, defence, or intelligence environments
- Experience with on-premises and air-gapped infrastructure
- Working knowledge of VPDSF, ISM, PSPF, and data classification and handling requirements
- Excellent judgement, discretion, and ability to operate autonomously in customer environments
- Ability to explain complex ML concepts clearly and write exceptionally well
- Experience in state law enforcement, public safety, or federal intelligence
- Hands-on experience with large language models, fine-tuning, evaluation, RAG, and failure modes
- Familiarity with entity resolution, geospatial analysis, OSINT, graph analytics, or tradecraft tooling
- Solutions architecture or commercial technical pre-sales experience
What We Do
We create intelligent systems that understand context, anticipate needs, and turn ideas into action, unlocking entirely new ways for people to work and create. The future isn’t just about software that stores information. It’s about technology that thinks, adapts, and acts. We are pioneering the next generation of AI-powered, action-driven systems that amplify human capability, accelerate workflows, and make work feel effortless. We believe AI should do more than assist, it should empower. If you're passionate about building the next era of intelligent software, join us.
