SAP ABAP Developer (E-Invoicing) - Fully Remote - Europe

Freelance/Contract SAP ABAP Developer (E-Invoicing) - Remote - Europe

Location

Remote

Engagement Type

On-Demand Contractor

Work Arrangement

• 0-20 hours per week
• Work assigned based on project demand
• Flexible, as-needed engagement model
• Long-term opportunity for the right consultant

Position Summary

We are seeking an experienced SAP ABAP Developer to provide on-demand development and support services across SAP landscapes. The successful consultant will support enhancement, integration, compliance, and maintenance activities, working closely with functional and technical teams to deliver high-quality SAP solutions.

A key focus of this role will be supporting Poland eInvoicing (KSeF) requirements, including integration development, XML processing, compliance validation, and submission management.

Key Responsibilities

• Design, develop, and maintain SAP ABAP objects including Reports, Interfaces, Conversions, Enhancements, Forms, and Workflows (RICEF).
• Develop and support integrations using IDocs, RFCs, OData services, APIs, and web services.
• Translate business and functional requirements into scalable technical solutions.
• Troubleshoot and resolve production issues, performance bottlenecks, and integration failures.
• Support SAP enhancement and compliance initiatives, including country-specific regulatory requirements.
• Perform technical analysis, impact assessments, and root cause investigations.
• Prepare and maintain technical specifications, design documentation, and support materials.
• Collaborate with SAP functional teams and business stakeholders to deliver effective solutions.

Required Skills & Experience

• 5+ years of SAP ABAP development experience.
• Strong hands-on experience with:
  • Classical and OO ABAP
  • ALV Reporting
  • User Exits, BAdIs and Enhancements
  • SmartForms, SAPscript and Adobe Forms
  • Performance tuning and optimisation
• Experience developing and supporting:
  • IDocs
  • RFCs/BAPIs
  • OData Services
  • REST/SOAP APIs
  • Web Services
• Experience working with SAP ECC and/or SAP S/4HANA environments.
• Strong troubleshooting and production support capabilities.

Mandatory Requirement

Poland eInvoicing (KSeF)

Candidates must have hands-on experience supporting Poland's National e-Invoicing System (KSeF), including:

• KSeF integration development
• XML generation and validation
• Submission and response handling
• Error management and monitoring
• Compliance with Polish eInvoicing regulations
• SAP integration with KSeF services

Preferred Skills

• SAP S/4HANA development experience
  • CDS Views
  • AMDP
  • New ABAP syntax
• Functional understanding of SAP FI, SD and MM processes.
• SAP Fiori/UI5 development experience.
• Experience supporting global eInvoicing or digital tax compliance initiatives.
• Knowledge of SAP Integration Suite or Middleware platforms.

Ideal Candidate

You are a hands-on SAP ABAP developer who can quickly understand existing solutions, troubleshoot issues independently, and deliver high-quality technical enhancements. You have practical experience supporting regulatory compliance initiatives, particularly KSeF, and are comfortable operating in a flexible, on-demand support model.