Senior Backend Developer/Architect - Test Data Platform

We are looking for a Senior Java Developer/Architect - Test Data Platform to one of our clients within Banking & Finance. Start date: 2026-10-01End date: 2027-01-29Location: Stockholm (3 days onsite, 2 days remote) About the assignment:

The client has an internal test data loading tool used to extract, transform, mask, and load test data across environments. The tool currently supports Oracle, SQL Server, DB2, and SAS. You will design, develop, and implement support for MongoDB and PostgreSQL into the existing platform. Core Responsibilities:

• Analyze existing architecture and integration model
• Implement MongoDB and PostgreSQL support including connection, authentication, metadata handling, data extraction, loading, error handling, and logging
• Develop technical documentation and conduct knowledge transfer to the internal team
• Ensure functional parity with existing database connectors and deliver test cases with verification Profile & Qualifications:
• Senior developer/architect with extensive experience in database integrations and backend development
• Strong background in data migration, ETL solutions, and NoSQL architectures
• Experience from financial sector and complex system landscapes is highly valued
• Familiarity with Test Data Management (TDM), data masking, and GDPR-related solutions is advantageous Required Skills:
• MongoDB
• PostgreSQL
• Java
• SQL Server
• Oracle Database
• JDBC Nice to have:
• IBM DB2
• Informatica TDM
• Delphix