Must-have stack:

.NET/C# | REST APIs | SQL Server | SQL | SFTP | File Processing

Essential Criteria :
Solid

.NET / C#

development skills, particularly

REST APIs / backend APIs

.
Experience with

Microsoft SQL Server development and backend engineering experience.
Experience developing data migration scripts

, utilities and migration services.
Solid

SQL skills for extraction, transformation, validation and data reconciliation.
Experience with file-based data migration

, including structured file formats.
Hands-on experience with

SFTP-based file transfer and ingestion

.
Experience integrating source systems with target platforms through

APIs, batch processing and ETL

.
Ability to build migration engines/services for high-volume backend data movement.
Robust focus on migration validation, data integrity,



reconciliation and error handling

.

Key Responsibilities :
Develop backend components for a large-scale system migration programme

.
Build

SQL Server and .NET-based migration utilities/services

.
Develop migration scripts and APIs to extract, transform and load data.
Process data received through

SFTP/files and load it into target systems.
Build and support

ETL/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.

📌 Dotnet Developer Southern Sydney (Australia)
🏢 Ad Astra Consultants
📍 Australia