Senior SAP ABAP / S/4HANA developer. 16 years writing and modernizing custom SAP code for finance, HR and logistics in Venezuela, Mexico, Costa Rica and the Dominican Republic. SAP-certified in ABAP, HANA 2.0 and Fiori.
I've been writing ABAP since 2010. I started as a junior developer at an SAP partner; today I lead the technical side of HANA migrations and S/4HANA readiness work.
I've delivered for banks, payment processors, agro-industry, logistics and HR teams. I understand the business process before I write the first line of code — that's why my developments go live and stay live.
I work in both worlds: classic ABAP (ALV, SmartForms, BAPIs, BAdIs, IDocs) that keeps operations running, and modern ABAP (RAP, CDS, AMDP, ABAP Cloud, Clean Core) that gets you ready for what's next. I use AI as a copilot to analyze, refactor and document faster, always with expert review.
I analyze custom code, fix what breaks and refactor to Clean Core with RAP, CDS and released APIs.
Led the technical execution of an Oracle → SAP HANA migration, including custom code impact analysis for RISE.
E-invoicing (CFDI 4.0, Carta Porte), tax withholding forms, W-2C, I-9, PCI DSS.
From functional spec to transport: data model, code, forms, interfaces, unit tests and docs.
Moving the database to HANA without breaking custom code, ahead of S/4HANA RISE. I led the technical execution and the custom code impact analysis, and built SAP BTP proofs of concept.
Compliance with the SAT for CFDI 3.3/4.0 and Carta Porte 1.0/2.0: REST integration with the tax authority, XML/JSON with ABAP classes and bulk download of supplier invoices.
Growers, farms, harvest and settlements in VES and USD: custom data model, dialog apps, mass uploads, postings via BAPI and number ranges with concurrency control.
Dynamic personnel actions and PA interfaces between SAP HCM and SuccessFactors Employee Central, plus regulatory updates (W-2C, I-9 2025).
Withholding certificates (income tax, VAT, ICA) in SmartForms, legal TXT files for VAT, municipal and ISAE withholdings, and BTEs on accounting documents.
Compatibility analysis and refactoring of OData services, proxies, SmartForms and HR reports to RAP, CDS and Clean Core, with AI-accelerated estimates.
Custom data model for cane growers and harvests; settlement dialog apps and ALV; multi-currency VES/USD postings with BAPI_ACC_DOCUMENT_POST; number ranges with concurrency control; Field Exits and BAdIs in FB60/MIRO; SmartForms and Adobe Forms; VAT, municipal and ISAE withholding files.
Led the technical execution of the Oracle → SAP HANA migration and Custom Code Management for S/4HANA RISE; SAP BTP proof of concept; personnel actions with SuccessFactors EC; W-2C, I-9 2025 and PCI DSS 2025; FI reports.
Overtime and Christmas bonus; infotypes 21 and 22 in S/4HANA and Fiori; BAdI HRPAD00INFTYBL; personnel roster.
Economic activity master data; XML/Excel credit data extraction; dynpros in BP and FNVM. Costa Rica.
Withholding certificate SmartForms (income tax, VAT, ICA); BTE for XREF1-3; balance sheet by third party.
Account determination by sales office; goods shipment processes. Costa Rica.
BAdIs for freight orders and units; purchasing forms; MIRO and FB60; bank files for payment proposals. Dominican Republic.
CFDI 3.3/4.0 e-invoicing and Carta Porte 1.0/2.0; RESTful services with the SAT; XML/JSON with ABAP classes; bulk CFDI download. Mexico.
Development standards; conversions, interfaces and reports; performance; HR personnel actions.
Enhancements, SmartForms, BDC, BAPI, ALE/IDocs, XML, HTTP, JDBC.
MM, SD, HR, FI; SAP HANA modeling; dialog programming; BDC.
ALV, enhancements, SmartForms, spool to PDF by email, workflow.
Enhancements, SmartForms, BAPI; FI support.
Production-line labor incentives (HR); FI and SD ALV reports.
PP, MM, SD; ALV, Modulpool, SmartForms, SAPScript; barcode labels and OCR; SD BAdIs; OLE.
Systems Analyst, Universidad Centro Occidental “Lisandro Alvarado” (UCLA), Barquisimeto
Based in Venezuela, UTC−4. Projects by engagement or consulting.