We're currently looking for an AI/ML Staff Engineer to join our financial services client in Sydney on a 6 month, rolling contract to lead the design of complex software systems
The role will encompass both hands-on engineering & leadership; you will lead technical delivery from initial system design through to development and production, while mentoring more junior devs and enhancing the team’s overall capability and productivity.
Key Responsibilities
- Architectural Strategy & Vision: Lead the design of complex software systems, advocating for a \"target state\" architecture that prioritizes resilience, security, scalability, and cost-effectiveness across the domain.
- Technical Leadership & Execution: Drive the end-to-end development of innovative solutions to address complex technical challenges, ensuring all implementations align with business needs and engineering best practices.
- Mentorship & Collaborative Culture: Provide high-level technical guidance and mentorship to engineers, fostering a culture of knowledge sharing and collaboration within your squad and across upstream/downstream partners.
- Cross-Functional Partnership: Collaborate with product managers, designers, and architects to translate business requirements into exceptional digital experiences, bridging the gap between technical constraints and product goals.
- Engineering Excellence & Innovation: Champion the evolution of engineering practices and the adoption of emerging technologies to continuously improve team efficiency, system quality, and operational scalability.
Required Skill Set
- Agentic Architecture & Control Patterns: Proven experience building agent loops (ReAct, Planning/Decomposition, Reflection, Multi-Agent Orchestration) and handling non-deterministic system design.
- Tooling & API Design: Experience defining strict JSON/OpenAPI schema interfaces optimized for LLM function calling and self-correcting error handling.
- State & Context Engineering: Expertise in state machine design, long-term memory (Vector/Graph RAG), and dynamic context window optimization (summarization, token budget management).
- Eval-Driven Development (EDD): Hands-on experience building automated evaluation pipelines (combining unit tests, schema checks, and LLM-as-a-Judge) to benchmark agent accuracy and prevent regressions.
- Agent Observability & Tracing: Proficiency with deep trajectory tracing tools (e.g., LangSmith, Phoenix, OpenTelemetry) to monitor execution graphs, latency, and token costs.
- Human-in-the-Loop (HITL) & Safety: Track record of designing HITL approval controls, sandboxed code execution (Docker/E2B), and guardrails against prompt injections or unintended tool actions.
- Technical Leadership & Pragmatism: Ability to define SLAs for non-deterministic products and know when to use deterministic code over fragile open-ended agent loops.
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AI Staff Engineer in Sydney employer: Hydrogen Group
Join a prestigious global law firm in New York City, where you will be part of a dynamic team that handles high-profile corporate transactions. The firm fosters a collaborative work culture that prioritises professional development, offering mentorship opportunities and the chance to work closely with industry leaders. With a commitment to excellence and innovation, this role provides a unique platform for growth in a vibrant city known for its legal prowess.
