11/11/2026 updated
100 % available
Senior SAP ABAP Developer | SAP ECC & S/4HANA On-Premise / Private Cloud
Zaragoza, Spain
Only remote
Master's degree in Automation and Software EngineeringAbout me
Senior SAP ABAP Developer with 20+ years of experience in ECC and S/4HANA. Skilled in ABAP Objects, CDS, Fiori backend, OData, IDoc, RFC, BAPI, REST/SOAP, enhancements and performance tuning. Experienced in S/4HANA custom code conversion, code reviews and ATC quality controls.
SAP S/4HANASAP IDocSAP ERPSAP ABAPSAP R/3Simple Object Access Protocol (SOAP)SAP BAPIRestful Api
SAP ECC and S/4HANA Development
Expertise in ABAP Objects, CDS View Entities and annotations, service definitions and bindings, ADT, S/4HANA custom code migration, ATC and Simplification Checks across SAP ECC and S/4HANA environments.
Integration and Services
Proficiency in SAP Gateway / SEGW (OData V2), IDoc, REST and SOAP web services, RFC including tRFC and qRFC, BAPI, and file-based interfaces for SAP and non-SAP system integration.
ABAP Team Leadership
Experience in development effort estimation and task planning, technical specification review and sign-off, mentoring and resolution of technical blockers, and coordination of internal developers and contractors including review and acceptance of their work. Led ABAP teams of up to 20 people.
Development Quality and Standards
Knowledge of development standards and technical documentation templates, code review, custom ATC check development, ATC check variant creation and configuration, and integration of ATC checks with CTS transport release and SAP Solution Manager ChaRM.
ABAP Application Development
Skills in custom reports, dialog programming, ALV development (classic and OO; grid, tree and editable ALV), Adobe Forms, and Microsoft Office integration (OLE/DOI).
Core ABAP
Solid foundation in ABAP Dictionary, Open SQL, SAP LUW and update processing (V1/V2), debugging and performance optimization.
SAP Enhancement Techniques
Hands-on experience with Enhancement Framework (BAdIs, explicit and implicit enhancements), customer/user exits, and FI-specific enhancements (BTE/Open FI, RWIN, substitutions and validations).
SAP S/4HANA Custom Code Migration
Practical experience adapting custom ABAP code for S/4HANA compatibility, resolving ATC and migration findings across multiple conversion projects.
Expertise in ABAP Objects, CDS View Entities and annotations, service definitions and bindings, ADT, S/4HANA custom code migration, ATC and Simplification Checks across SAP ECC and S/4HANA environments.
Integration and Services
Proficiency in SAP Gateway / SEGW (OData V2), IDoc, REST and SOAP web services, RFC including tRFC and qRFC, BAPI, and file-based interfaces for SAP and non-SAP system integration.
ABAP Team Leadership
Experience in development effort estimation and task planning, technical specification review and sign-off, mentoring and resolution of technical blockers, and coordination of internal developers and contractors including review and acceptance of their work. Led ABAP teams of up to 20 people.
Development Quality and Standards
Knowledge of development standards and technical documentation templates, code review, custom ATC check development, ATC check variant creation and configuration, and integration of ATC checks with CTS transport release and SAP Solution Manager ChaRM.
ABAP Application Development
Skills in custom reports, dialog programming, ALV development (classic and OO; grid, tree and editable ALV), Adobe Forms, and Microsoft Office integration (OLE/DOI).
Core ABAP
Solid foundation in ABAP Dictionary, Open SQL, SAP LUW and update processing (V1/V2), debugging and performance optimization.
SAP Enhancement Techniques
Hands-on experience with Enhancement Framework (BAdIs, explicit and implicit enhancements), customer/user exits, and FI-specific enhancements (BTE/Open FI, RWIN, substitutions and validations).
SAP S/4HANA Custom Code Migration
Practical experience adapting custom ABAP code for S/4HANA compatibility, resolving ATC and migration findings across multiple conversion projects.
Experience
Professional experience10+ years
Freelancer since2023
Languages
EnglishFluentRussianNative speakerSpanishBasic knowledgeUkrainianNative speaker
Project history
New ABAP development for a greenfield SAP S/4HANA implementation, including Fiori-based solutions.
Adapted custom ABAP code for S/4HANA, resolving ATC and migration findings. Delivered ABAP change requests beyond the migration scope, including a mass XSteps upload tool and automated serial number generation for process orders. Core migration phase: Jan 2024 - Mar 2026.
Implemented ABAP change requests and provided production support while leading task planning, estimation and technical reviews. Developed ABAP solutions for SAP rollouts at Kamet Steel, Metinvest Shipping and MI Polska. Also delivered ABAP development for external S/4HANA clients.