About MasterKey

Masterkey is building the AI operating layer for independent hotels.

Hotels still spend too much time jumping between disconnected systems, checking dashboards and completing repetitive admin. Masterkey connects those systems, understands what is happening across the property, and turns fragmented data into decisions and actions.

Our goal is simple: give hoteliers more time to focus on their guests.

We’re a small, ambitious startup team. We move quickly, experiment often and work closely together. We take the work seriously, but we’re also fun people to work with and want someone who enjoys the energy and unpredictability of an early-stage workplace.

Role Description

We’re looking for an AI Engineer to help build the intelligence behind Masterkey.

You’ll work directly with the founders and engineering team to build AI systems that understand hotel operations, generate recommendations and increasingly automate repetitive work.

You may work across

- LLM-powered applications and AI agents
- Agentic workflows and tool calling
- RAG, embeddings and memory systems
- Recommendation and decision systems
- Structured and unstructured hotel data
- AI evaluation and reliability
- APIs, databases and production integrations
- Rapid prototyping and experimentation

This is not a research-only role. We want someone who enjoys building, shipping and improving AI products used in the real world.

What We Are Looking For

- Strong Python and software engineering fundamentals




- Experience building with LLMs, machine learning or modern AI frameworks
- Understanding of APIs, databases and production software systems
- Familiarity with concepts such as RAG, embeddings, structured outputs, tool calling or AI agents
- Strong problem-solving and experimentation skills
- Comfortable working with ambiguity and changing priorities
- Able to move quickly without needing everything perfectly defined
- Strong communication and collaboration skills
- Bachelor’s degree in Computer Science, Software Engineering, AI, Data Science or a related field is preferred, although equivalent practical experience is equally valuable.

You'll Thrive Here if You

- Enjoy fast-paced startup environments
- Take ownership instead of waiting for detailed instructions
- Adapt quickly when priorities change
- Like turning ideas into working products
- Are comfortable solving messy, unfamiliar problems
- Want significant influence over both the product and technical direction
- Can work hard without making work miserable for everyone around you

Why MasterKey You’ll join early enough to genuinely shape what we build.

You’ll work directly with the founders, have meaningful ownership over the AI architecture, and see your work move from an idea to something used by real hotel operators quickly.

If you want to build practical AI, move fast and have a lot of ownership, we’d love to hear from you.

📌 Artificial Intelligence Engineer (South Yarra)
🏢 Masterkey
📍 South Yarra