Backend Engineer – .NET (Data Migration)

About the role

A full-time permanent Backend Engineer position in Sydney, focused on building .NET and SQL Server components for a large-scale system migration programme. The role covers data extraction, transformation, loading, file processing via SFTP and integration of source and target systems.

Key responsibilities

• Develop backend components for a large-scale system migration programme.
• Build SQL Server and .NET-based migration utilities and services.
• Develop migration scripts and APIs to extract, transform and load data.
• Process data received through SFTP or files and load it into target systems.
• Build and support ETL and batch interfaces between source and target platforms.
• Implement data validation and reconciliation across migration stages.
• Troubleshoot migration failures, data-quality issues and interface errors.
• Support migration testing, rehearsal and production cutover activities.

Required profile

• 8+ years of experience.
• Strong .NET / C# development skills, especially REST APIs and backend APIs.
• Experience developing data migration scripts, utilities and migration services.
• Hands-on experience with SFTP-based file transfer and ingestion, and file-based data migration.
• Ability to build migration engines for high-volume data movement and to focus on data integrity, reconciliation and error handling.

Required skills

• .NET / C# and REST APIs
• Microsoft SQL Server and strong SQL for extraction, transformation, validation and reconciliation
• SFTP and file processing
• ETL and batch processing