Senior SAP / ABAP Engineer

About the role

Causa Prima is building an AI-powered AP/AR network and recovery audit platform, founded by the team behind Taulia. This Senior SAP / ABAP Engineer is a senior individual contributor role based in Madrid, owning the SAP layer of the product: how the add-on reads from and writes to S/4HANA and ECC systems safely and at scale. You will set the patterns the team builds on and act as the technical voice when customer SAP teams ask hard questions.

Key responsibilities

• Architectural ownership of the ABAP add-on in its registered namespace, including structure, release and upgrade safety
• Promote clean core compliance and SAP certification, using released CDS and public APIs where available
• Design how financial data moves in and out of SAP (OData, BAPIs, RFCs, IDocs) at production volume
• Implement FI/CO logic such as posting, payment terms and Skonto, open item management, account determination and tax codes
• Define conventions for testability, ABAP Unit coverage and static analysis (ATC, SCI)
• Shape heterogeneous customer setups (charts of accounts, company codes, country versions, ECC vs S/4HANA) into one consistent model
• Build for idempotency, reconciliation and traceability, and lead technical discovery and onboarding with finance teams, SAP admins and Basis teams

Required profile

• At least 6 years of hands-on ABAP development on S/4HANA and ECC, with shipped production code and upgrades
• Deep AP knowledge: three-way match, Skonto postings, blocked invoices, open item clearing, vendor master, payment runs, duplicate detection
• Judgment on scope and risk, and clear communication in English; Spanish or German is a strong plus
• Nice to have: AR knowledge, SAP certification experience, SAP Joule, SAP BTP, AP automation/e-invoicing, fintech or regulated background

Required skills

• Modern ABAP: CDS views, OO ABAP, ABAP Unit, RAP, upgrade-safe code
• Integration with third-party systems via OData, RFC and IDoc
• Using AI tools to speed up development, testing and analysis, and to generate custom test programs and performance scenarios