Artificial Intelligence Engineer

AI Engineer / Agent Engineer, Agentic AI (TypeScript + Python) Sydney, Hybrid, 3 days per week in a Sydney CBD office $130,000 to $180,000 plus super, junior to senior levels Our client is a large global professional services organisation building out an in house AI team that designs, builds and evaluates production agent systems. This is not a chatbot wrapper team. Their agent harness is built in TypeScript on the Vercel AI SDK, with model and provider routing through a LiteLLM based gateway, running at scale in Azure. Python is used heavily alongside TypeScript for evaluation, data work and model experimentation, so comfort moving across both stacks is genuinely valued. They are evaluation led. Every decision is backed by measurement, not demos. They strongly prefer candidates who have worked at startups and bring that vibe, people who are comfortable moving fast and owning problems end to end, even though the business behind the team is large. What you'll do Build and extend an agent harness in TypeScript including the runtime loop, tool dispatch, retries, tool call repair, and state persistenceDesign context and memory strategies for long horizon agent work including compaction, caching and token budgetingArchitect multi agent and sub agent systems with lead and worker patterns, delegation and shared stateEngineer RAG pipelines on PostgreSQL with pgvector, including hybrid and re ranked retrievalBuild evaluation harnesses and trajectory level assessment so quality is proven rather than assumed, using Python for evaluation runs, data work and model experimentationInstrument agents with observability tooling such as Langfuse and OpenTelemetryMentor junior engineers as part of a scaling team What we're looking for Proven experience shipping production AI systems. This is essential, not just prototypes, POCs or internal demosWorking Python capability, including evaluation, data work and model experimentation. Comfort moving across TypeScript and Python day to day is important for this roleA background at a startup or strong affinity with startup pace and cultureStrong TypeScript experience, confident with the type system for tool schemas and structured outputsHands on experience building agents with a modern framework, Vercel AI SDK strongly preferredPractical context engineering experience including caching and cost and latency trade offsAn evaluation first mindsetSenior candidates should bring multi agent architecture experience and be comfortable mentoring othersStrong PostgreSQL experience, pgvector a strong plus