AI Software Engineer (Front End)

ABOUT THE ROLE

Maincode is training the next version of Matilda, the first large language model built and trained from scratch in Australia. We are now scaling the model and deploying it as a live production system.

To do that, we build AI systems from first principles. We design the architectures, run the infrastructure, shape the training process, and operate the systems that serve our models.

Matilda is a production system, not a research prototype, built to be deployed and served for open public access. If the training stack is how Matilda learns, the product is how people experience it. This role sits directly in that delivery layer.

You will build the front end systems that make Matilda usable, fast, and trustworthy for real users. You will work on the interfaces that turn a model into a product: streaming responses, conversation state, safety UX, performance, reliability, and the tooling that helps the team iterate quickly.

WHAT YOU WOULD ACTUALLY DO

You will build and maintain the front end systems that power Matilda’s public product and internal tools.This includes:

- Building the core web interface for interacting with Matilda (chat, sessions, history, settings)

- Implementing fast, reliable streaming UX for model outputs (real-time tokens, partial results, cancellation, retries)

- Designing and building UI workflows that support safe and responsible use (reporting, refusals, user feedback, content handling)

- Working closely with backend and infra engineers to integrate APIs, auth, rate limits, and observability

- Improving performance across the app (latency, bundle size, rendering, perceived responsiveness)

- Building internal dashboards and tools that help the team operate the system (usage, quality signals, feedback triage)

- Debugging issues across browsers, devices, networks, and production environments

- Raising the bar on quality through testing, monitoring, and careful rollout practices

You will spend time in code, UI...