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 skilled 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 Type Script 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 Type Script 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 Type Script including the runtime loop, tool dispatch, retries, tool call repair, and state persistence
Design context and memory strategies for long horizon agent work including compaction, caching and token budgeting
Architect multi agent and sub agent systems with lead and worker patterns, delegation and shared state




Engineer RAG pipelines on PostgreSQL with pgvector, including hybrid and re ranked retrieval
Build evaluation harnesses and trajectory level assessment so quality is proven rather than assumed, using Python for evaluation runs, data work and model experimentation
Instrument agents with observability tooling such as Langfuse and Open Telemetry
Mentor 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 demos
Working Python capability, including evaluation, data work and model experimentation. Comfort moving across Type Script and Python day to day is important for this role
A background at a startup or solid affinity with startup pace and culture
Robust Type Script experience, confident with the type system for tool schemas and structured outputs
Hands on experience building agents with a modern framework, Vercel AI SDK strongly preferred
Practical context engineering experience including caching and cost and latency trade offs
Senior candidates should bring multi agent architecture experience and be comfortable mentoring others
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📌 Ai Engineer Production Agents Hybrid Sydney Tamworth
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