Senior Data Scientist
At a glance
Senior Data Science role at Cba (CommBank Careers). Sydney CBD Area · full-time.
Pay not stated Data Scientist salary
dataroles summary, based on the employer's posting.
What you'll do
- Review AI use cases across the Group and decide whether systems meet their purpose and behave as intended
- Match validation depth to risk, checking data, methods, assumptions and outcomes before presenting your findings
- Challenge model developers, product owners and business stakeholders while staying independent of their decisions
- Provide analysis that informs model approvals, usage decisions and acceptance of risk
- Help shape validation methods, tools and standards, and build capability by sharing knowledge across the team
What you bring
- You have practical experience creating and assessing AI and generative AI systems, including synthetic data
- You bring advanced Python skills and substantial experience with GitHub, version control and CI/CD
- You understand GenAI and agent-based designs, including RAG pipelines, tool use and guardrails
- You can navigate unfamiliar code, reproduce evaluation workflows, build test harnesses and inspect trace data
- You have worked with AI coding agents such as Claude Code or Codex, and can maintain workflow automation components
Who this fits
This role suits a self-directed senior data scientist who keeps learning as AI techniques and risks change, spots issues carefully and explains technical findings to mixed audiences. You’ll work closely with model developers, product owners and business stakeholders while maintaining independent judgement.
From the employer
AI & General Model Validation (AIGMV) provides independent technical challenge and review of the Group's most important ML and AI models, across business and support units. As a Senior Data Scientist within the team, you will independently review, challenge and validate AI use cases across the Group. You will assess whether AI systems are fit for purpose and operate as intended, and whether the risks they introduce are understood and appropriately controlled.
You will design and carry out validation that is proportionate to the risk, covering data, methodology, assumptions and outcomes, and explain your findings clearly to technical and non-technical stakeholders. Model approvals, usage decisions and risk acceptance will draw directly on your analysis and judgement.
You will work closely with model developers, product owners and business stakeholders, while remaining independent of them, and provide constructive challenge that supports safe and sustainable AI adoption. You will also help develop the team's AI validation practices, tooling and standards, sharing knowledge and building capability across the team.
A courageous mindset and a proven record of self-directed learning, with the curiosity and discipline to stay ahead of fast-changing AI techniques and risks
Close attention to detail and a knack for spotting problems
Working knowledge of GenAI and agentic architecture, including orchestrators, sub-agents, RAG pipelines, tool use, guardrails, multi-agent routing, memory and persona handling, and LLM-as-a-Judge
Hands-on experience designing, building and evaluating AI and Generative AI solutions, including synthetic data generation. Experience in fine-tuning transformer models is also a plus.
Experience with current GenAI frameworks and tools like LangChain, OpenAI Agents SDK, LangGraph, Pydantic, Langfuse/HoneyHive or similar platforms.
Advanced Python, plus strong experience with GitHub, version control and CI/CD pipelines. SQL, R or TypeScript is a plus.
Comfort reading and navigating unfamiliar codebases, reproducing evaluation pipelines, writing test harnesses and inspecting trace data
Hands-on experience with AI coding agents, including Claude Code and Codex, and the ability to build and maintain skills, sub-agents, hooks and plugins that automate workflows.
Working knowledge of traditional machine learning models, including regression, random forests, XGBoost, and related evaluation methods.
Strong communication skills, with the ability to explain complex technical concepts to mixed audiences.
Working with us:
At CommBank, we're committed to creating an accessible, inclusive and respectful workplace. If you require support or adjustments, please let us know. We welcome applications from people of all backgrounds and we're particularly committed to making a positive difference for Aboriginal and/or Torres Strait Islander Peoples.
If you're already part of the Commonwealth Bank Group (including Bankwest, x15ventures), you'll need to apply through Sidekick to submit a valid application. We’re keen to support you with the next step in your career.
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