Senior Data Scientist
Cox Purtell
Science & Technology / Other
Posted 18/02/2026
Closed 20/03/2026
Sydney, 2000, New South Wales
Full time
Senior Data Scientist - Modelling and Portfolio Performance
Sydney or Melbourne
What you will enjoy about us
You will enjoy working in a technology-led fintech where modelling sits at the heart of the product - not in a back-office function.
You will enjoy owning problems end-to-end. Not just training models, but understanding how they behave in production, how they drift, and how they influence real portfolio performance.
You will enjoy being close to decision-making. This role works directly with the CTO and engineering, where ideas move quickly and models ship fast.
You will enjoy breadth. Our data science team works across multiple problem types - credit, behavioural modelling, performance analysis and optimisation - not just one narrow ML specialism.
You will enjoy impact. When you improve something here, you see it in live metrics.
The kind of work you will be doing
Build and refine credit and behavioural models
Run deep exploratory analysis across complex, messy datasets
Monitor production models and diagnose performance shifts
Analyse portfolio trends and identify performance leakage
Partner closely with engineers to deploy and iterate
Influence commercial and product decisions with structured modelling insight
This is hands-on modelling inside a live product environment.
You will enjoy this if
You prefer product companies over institutional environments
You like models that ship and evolve - not models that sit in approval cycles
You care about statistical rigour and commercial outcomes equally
You are comfortable working inside engineering sprint cycles
You have seen real-world model behaviour and learned from it
You likely come from a tech-led fintech, SaaS, scale-up or consulting background where modelling directly influenced product or revenue performance.
What we work with
AWS
Airflow
Python for analysis
JavaScript and TypeScript in product
Experience deploying and monitoring models in production environments will feel natural here.
What this role is not
It is not a regulatory modelling function.
It is not a slow-cycle corporate risk seat.
It is not a pure research or GenAI experimentation role.
It is modelling that matters - commercially and immediately - inside a growing technology business.
Highly flexible, hybrid working. Melbourne or Sydney based. Salary negotiable to $200k + Super. Australian work rights are essential. Apply with your CV?
Skills:
- Senior Data Scientist
- Fintech
- Credit Modelling
- Portfolio Performance
- Product Analytics
- Predictive Modelling
- Statistical Modelling
- Model Monitoring
- Production ML
- Python
- SQL
- AWS
Salary benefits:
super
Cox Purtell
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