_{17th July, 2026}

Senior Data Engineer 
6 Months
Sydney based, two days a week onsite
Up to $1100 per day

About the opportunity:

A consultancy client of ours is looking for a Senior Data Engineer for a payment  platform migration project within the financial services sector.

What you'll be doing:

• Building pipelines that take data in, validate and enrich it, then produce a final output
• Converting old fee structures to a new system using configurable mapping rules
• Calculating tiered pricing, tax treatment, and multi part payment splits in code
• Checking data quality row by row and producing reconciliation reports
• Writing tests that compare pipeline output against known good results over time
• Managing reference data covering roughly a hundred different fee types
• Working closely with a product team rather than delivering in isolation

What we need to see:

• Strong Python, comfortable keeping things lean rather than reaching for heavy libraries
• Experience rebuilding business critical logic from an old system onto something new
• Real experience coding financial calculations, not just reporting on them
• Reconciliation or audit style reporting you've built yourself
• Solid SQL and comfort managing structured reference data
• A genuine track record of testing data pipelines properly
• AWS experience, though not necessarily with the big managed data platforms

Bonus points:

• Background in payments, banking, or billing systems
• Experience in a regulated financial environment
• Exposure to tax treatment inside financial systems

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