We are looking for an experienced Backend Engineer - .NET to join our team and contribute to a large-scale system migration programme.

The ideal candidate will have strong hands-on experience in .NET/C# backend development, REST APIs, SQL Server and file-based data migration, with the ability to build robust migration services and integrate systems through APIs, SFTP and batch processing.

Key Skills & Experience
8+ years of experience in backend engineering, with solid .NET / C# development skills.
Hands-on experience developing REST APIs and backend services.
Robust SQL Server and SQL skills, including data extraction, transformation and reconciliation.
Experience developing data migration scripts, utilities and migration services.
Hands-on experience with SFTP-based file transfers, file ingestion and structured file processing.




Experience integrating source and target systems using APIs, ETL and batch processing.
Solid understanding of data validation, integrity, error handling and reconciliation.

What You'll Be Doing
Building .NET-based migration utilities, backend services and APIs.
Developing SQL scripts to support large-scale data migration.
Processing files received through SFTP and loading data into target systems.
Developing and supporting ETL and batch interfaces.
Performing data validation, reconciliation and troubleshooting migration issues.
Supporting migration testing, rehearsals and production cutover activities.

📌 Backend Developer Sydney
🏢 Umbrella Club
📍 Sydney