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AI Researcher

Maincode
Melbourne VIC

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Job Details

Full-time

Qualifications

Deployment
Research
APIs
AI

Full Job Description

About the role

Maincode builds foundation models from first principles on Australian infrastructure. We design architectures, run our own compute, shape the training process, and operate the systems that serve our models.

We have built Matilda, the first large language model built and trained from scratch in Australia. Our new compute cluster is live; we are scaling the next version of Matilda and deploying and serving it live for public access.

We are looking for AI researchers who want to work on the core architecture, training, and evaluation of large-scale language models that power Matilda.

This role is not focused on incremental benchmarking or paper output. You will work directly with the engineers running large-scale training systems and help design models that learn efficiently and behave reliably in production.

What you would actually do

You will work across the model development loop, from research questions to training runs to evaluation.

This includes:

Designing and testing architecture changes and training regimes for large language models
Running controlled experiments at scale and isolating causal effects
Studying failure modes in reasoning, generalisation, robustness, and representation
Shaping objectives, data mixtures, and optimisation choices that influence model behaviour
Building and refining evaluations that measure capability and reliability, not just scores
Analysing training dynamics using logs, metrics, and model outputs
Collaborating with ML systems engineers on distributed training and training operations
Writing clear internal notes that turn experimental results into design decisions

You will spend substantial time in code, training runs, logs, and evaluation outputs. The goal is clarity about what improves the model and why.

What we are looking for

We care about depth of reasoning, experimental discipline, and the ability to make progress under ambiguity.

We expect:

Hands-on experience writing and running production-grade ML or research code
Strong Python and experience with PyTorch or JAX
Solid understanding of transformer-based language models and the basics of pre-training and evaluation
Ability to design experiments, interpret results, and communicate tradeoffs clearly
Comfort working close to infrastructure, performance constraints, and operational reality
Interest and exposure to reasoning-oriented architectures and training methods beyond standard approaches, and beyond standard LLMs

Nice to have

Experience with distributed training concepts and tooling (data parallel, tensor parallel, sharding, checkpointing)
Experience running training across multiple nodes and managing long training cycles
Familiarity with large-model training stacks and frameworks (for example Megatron-style systems, DeepSpeed-like tooling, FDSP or similar)
Comfort across the full workflow: training, evaluation, and deployment constraints
Experience working in ROCm-based environments

How you would work

This is hands-on research. You will use code as a primary tool for thinking.

You will be expected to:

Move between theory and implementation quickly and precisely
Prefer controlled experiments over broad sweeps
Use logs, metrics, and model behaviour to guide decisions
Work closely with engineering counterparts to scale and validate ideas

What this role is not

It is not a product research role
It is not prompt engineering
It is not fine-tuning someone else’s model and shipping wrappers around external APIs

You will work on Matilda, trained from scratch on our infrastructure, and pushed until its behaviour is understood and improved.

Why Maincode

Maincode builds and operates the full stack: training infrastructure, model code, evaluation systems, and deployment. We run one of the largest private AI compute environments in Australia, built for the sole purpose of training and deploying large scale models.

If you want to work directly on training and evaluating a large language model built from scratch, this is the only role in Australia that will put you inside that work.

Note

This is a full time role based in Melbourne, working closely with our in person team. At this time we are not able to offer visa sponsorship, so applicants must have existing and unrestricted work rights in Australia.

Apply Now

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