Senior Engineer – Data Migration & Billing Platforms

Help modernise critical billing and pricing systems within a leading financial services environment.

Responsibilities

- Design and develop data migration and transformation pipelines to support the transition from a legacy eBilling platform to a modern SaaS billing solution.
- Build multi‑stage data processing workflows that ingest, validate, enrich and transform billing and transaction data.
- Develop file‑processing solutions, including CSV ingestion and generation of fixed‑format output files.
- Create configuration‑driven mapping frameworks to translate legacy billing structures into target platform formats.
- Implement complex pricing, fee and billing calculations, including GST treatment and payment fee structures.
- Develop robust data validation, reconciliation and exception‑handling processes.
- Manage reference data, eligibility matrices, lookup tables and rate catalogues.
- Build automated testing frameworks and regression suites to ensure data quality and migration accuracy.
- Work closely with business, technology and domain stakeholders to deliver reliable migration outcomes.

Qualifications

- Strong experience delivering complex data migration, transformation or integration projects.
- Advanced Python development skills (highly preferred).
- Experience with Snowflake or Databricks.




- Experience designing and building ETL and data processing pipelines.
- Strong understanding of data mapping, transformation and reconciliation techniques.
- Experience working with structured data formats including CSV, fixed‑width or batch processing files.
- Strong SQL skills and experience managing reference data and lookup tables.
- Experience implementing data validation, error handling and data quality controls.
- Strong testing discipline, including automation, reconciliation and regression testing.
- Familiarity with AWS environments.
- Highly desirable: banking, payments or financial services experience.
- Understanding of payment and billing products such as BPAY, RTGS, Direct Entry, NPP and International Money Transfers (IMT).
- Experience with billing, pricing or charging platforms.
- Understanding of GST treatment within financial or billing systems.

Benefits

- Adaptable working arrangements and autonomy.
- Learning and development programmes, including a Craft 180 Program.
- Salary packaging, purchased leave and novated leasing options.
- Health and wellbeing programmes covering mental, physical, emotional and financial aspects.
- Social activities and recognition programmes.
- Opportunities for career growth and diverse projects.

We welcome applicants from all backgrounds and provide reasonable accommodations for individuals with disabilities.

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📌 Senior Engineer - Data & Insights (City of Sydney)
🏢 VAU Versent
📍 City of Sydney