SAP Integration Engineer (CPI/BTP) Freelance

Overview

Part-time freelance SAP Integration Engineer role to build the SAP integration for an AI-powered invoice booking solution, working alongside an Azure development team. The engagement is for an initial three months, with the possibility of extension.

What you'll do

• Design, develop and test integrations using SAP Cloud Integration (CPI) within SAP BTP.
• Integrate the Azure-based solution with SAP S/4HANA supplier invoice APIs.
• Work alongside the Azure development team throughout the build to define interfaces, data mappings and integration flows.
• Implement authentication, validation, error handling, monitoring and retry mechanisms.
• Prevent duplicate invoice submissions and ensure consistent processing across systems.
• Support auditability and implement approval checkpoints for automated financial actions.
• Troubleshoot integration issues and support end-to-end testing.
• Document interfaces, configurations, dependencies and recovery procedures.

What you'll need

• Hands-on development experience with SAP CPI and SAP BTP.
• Familiarity with SAP S/4HANA supplier invoice APIs.
• Experience integrating SAP with external applications or cloud platforms.
• Practical experience with API-based integrations, including OData and REST.
• Understanding of SAP FI invoice processing and financial posting workflows.
• Experience handling integration failures, retries, duplicate prevention and transaction consistency.
• Ability to work independently and collaborate closely with an Azure development team.
• Working proficiency in English.

Nice to have

• Experience with SAP CIM and/or SAP Ariba.
• Experience integrating SAP with Microsoft Azure services.
• Familiarity with AI-driven invoice processing or financial automation.

Details

• Location: Bulgaria, remote.
• Employment type: freelance, part-time.
• Initial engagement of three months, with the possibility of extension.