Lennin R.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

Senior SAP ABAP Developer with 8 years of SAP experience (10+ years in software development), working on both SAP ECC and S/4HANA. I build clean, modern and performance-focused ABAP solutions — from reports and forms to integrations and complex financial logic — and I deliver code that is tested, documented and ready for production transport. WHAT I CAN DO FOR YOU • New developments in modern ABAP (7.5+): OO ABAP, CDS Views, AMDP / HANA SQLScript, built in ADT (Eclipse) • Performance tuning of slow reports and programs (SQL trace, runtime analysis, push-down to HANA) • Integrations: SAP PI/PO (ESR objects, mappings, Integration Directory / ICO configuration, ABAP proxies, monitoring), OData services, REST APIs exposed from ABAP, IDocs • Enhancements to standard: User Exits, BAdIs, Enhancement Framework, BAPIs • Reports: ALV (classic, OO ALV, SALV), interactive and classical reports • Forms: Smart Forms and SAPscript (invoices, fiscal documents, layouts) • Data loads and migration: BDC (call transaction / session), LSMW, custom upload programs • Module pool / dialog programming and Web Dynpro ABAP FUNCTIONAL AREAS I HAVE DEVELOPED FOR FI, CO, MM, SD, HR, CRM, CS, Retail (S/4HANA Retail), CML / Loans (Consumer & Mortgage Loans) and CAR. HOW I WORK • I confirm scope, constraints and acceptance criteria before writing code • I verify function module signatures, tables and fields in the real system — no guesswork • I use the native technology of your release (CDS/AMDP on S/4, optimized Open SQL on ECC) • Clear communication in English and Spanish, with delta-style deliveries that are easy to review I currently work as Senior SAP ABAP Developer at a regional group in Central America and support international clients on Upwork. Send me your requirement and I will reply with a clear plan and estimate.