Senior Data Scientist

Commonwealth Bank of Australia; Sydney; On-site; AUD 180,000 - 240,000; Full time

Job summary

Commonwealth Bank of Australia is seeking an experienced AI lead to deliver high-priority GenAI and agentic AI initiatives within Retail Banking Services. You will design and deploy cutting-edge AI capabilities, oversee ML model modernization, and embed data science methods across the bank to enhance customer experiences and operational efficiency.

The role requires strong Python skills, deep knowledge of Gen AI and LLMs, and the ability to communicate complex technical concepts to stakeholders.

Qualifications

• Experience in Gen AI, chatbot development, and LLMs.
• Statistics and probability; interpret models.
• Python proficiency; AI/ML model development experience.
• Excellent communication for documentation and stakeholder engagement.
• Tertiary qualification in Data Science, Statistics, Computer Science, or related field.

Responsibilities

• GenAI and agentic system design and development across RBS.
• Develop and implement Machine Learning Models to drive business outcomes.
• Expand Data/AI Science usage across the banking landscape.
• Drive continuous improvement and business outcomes with stakeholders.

Skills

Gen AI

LLMs

Python

Statistics

Communication

Data Science

Cloud (AWS)

Azure

ETL

Docker

Education

Data Science

Statistics

Computer Science

Tools

LangChain

LangGraph

pydantic_ai

Spark

TensorFlow

PyTorch

SQL

GitHub

Docker

Job description

Role overview

See yourself in our team: At CBA we have an ambitious goal of leading the way in changing the world through AI. With great buy-in from all senior leadership, we have embarked on world first initiatives to deliver exceptional experiences to our customers. In Retail Banking Services (RBS), as the largest and customer facing part of the bank, we play a unique role in bringing this vision to life and build a brighter future for all Australians. The opportunity: Reporting to the AI Domain Lead, you will deliver high priority initiatives across RBS. You will work on the delivery of world-class AI capabilities across RBS that will also build capabilities for the rest of CBA. You will be responsible for cutting edge initiatives in Agentic AI, GenAI, and broader AI. Our strategic focus lies in delighting our customers at every touchpoint, offering outstanding service, and meet the needs of our customers. Why CommBank? CommBank is leading the world of banking by venturing into new-to-the-world innovations. We're on the cutting edge, embracing AI technologies to reshape how we operate and serve our customers.

Key Responsibilities

• GenAI and Agentic system design and development: Drive the expansion and adoption of Generative AI solutions across RBS, optimising our product offerings through design and implementation of advanced Gen AI capabilities and agentic AI systems.
• Develop and implement Machine Learning Models: Lead the overhaul of various machine learning models, enabling to drive strategic business outcome for various stakeholders.
• Expand Data/AI Science Usage: Identify AI opportunities and embed these methodologies into a broader range of activities across the banking landscape
• Drive Continuous Improvement and Business Outcomes: work closely with business stakeholder to pioneer adoption and application of cutting edge AI and Gen AI capabilities and paving the path for how the bank will operate to towards the vision of re-imagined banking and customer service.

Weâre interested in hearing from people with the following skills:

• Proven experience in Gen AI, chatbot development, and LLMs.
• Strong foundation in statistics and probability; able to interpret models.
• Proficiency in Python and experience with AI/ML model development.
• Excellent communication skills for documentation and stakeholder engagement.
• Tertiary qualification in Data Science, Statistics, Computer Science, or a related field.

Technical Skills and Tools

• We use a broad range of tools, languages, and frameworks. We donât expect you to know them all but experience or exposure with some of these (or equivalents) will set you up for success in this team.
• Cutting-Edge AI: Work on projects leveraging traditional AI, Generative AI, and agentic AI to pave the path for how banking and broader industry functions in the future.
• Agentic AI: Experience designing and building autonomous or semi-autonomous agent systems — including intent/task orchestration, tool use, multi-step decision-making, and guardrails — using frameworks such as LangGraph, pydantic_ai, or equivalents.
• Generative AI: Familiarity with various aspects of Generative AI, including prompt engineering, Retrieval-Augmented Generation (RAG), guardrail design, orchestration design, and tools such as LangChain and LangGraph.
• Machine Learning: Expertise in the design and construction of machine learning models, including feature engineering, model selection, hyperparameter tuning, model evaluation, and deployment of predictive models into production environments.
• Version Control and CI/CD: Experience with version control and CI/CD pipelines such as GitHub.
• Tooling: Hands-on experience with data science tools such as Spark, Python, R, TensorFlow, PyTorch, and SQL.
• Data Engineering: Knowledge of ETL processes and data pipeline construction, ensuring efficient data flow and integration.
• Deployment: Familiar with Docker for containerization and deployment of applications.
• Cloud Architecture: Grounded understanding in AWS or Azure Cloud architecture and integration, demonstrating experience in deploying and managing cloud-based solutions.

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 We're keen to support you with the next step in your career. We're aware of some accessibility issues on this site, particularly for screen reader users. We want to make finding your dream job as easy as possible, so if you require additional support please contact HR Direct on 1800 989 696.

Advertising End Date: 12/11/2026

Whether you're passionate about customer service, driven by data, or called by creativity, a career with CommBank is for you. Our people bring their diverse backgrounds and unique perspectives to build a respectful, inclusive and flexible workplace. One where we're driven by our values, and supported to share ideas, initiatives, and energy. One where making a positive impact for customers, communities and each other is part of our every day. Here, youâll thrive. Youâll be supported when faced with challenges, and empowered to tackle new opportunities. We really love working here, and we think you will too.