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Hari Krishna K

@harikrishnak1

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SAP ABAP developer at Valero building RAP-based S/4HANA fleet and voyage scheduling applications.

United States

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At Valero, I developed RAP-based S/4HANA applications for vehicle master maintenance, fleet availability, voyage requirements, and load/discharge scheduling. I also implemented transactional business objects and AMDP-based data processing for scheduling and fleet data.

At Fiserv, I architected e-invoicing and e-payment solutions for five LATAM countries, integrating SAP S/4HANA with tax-authority stamping and third-party platforms. I also developed financial document workflows and OData services for electronic transactions.

At IBM, I worked on S/4HANA implementation and support projects for Nestlé, Steelcase, and Al Abdulghani Motors, including TMS enhancements, production support, and upgrade compatibility work. Earlier, at Wipro Limited, I developed BRF+ carrier-determination applications and SAP Fiori apps for Apple.

My work also includes SAP FS-CML, mortgage lending, and loan servicing application development, along with SAP integration, data migration, and production support. I hold the SAP Certified Development Specialist – ABAP for SAP HANA 2.0 certification.

Experience

Work history, roles, and key accomplishments

Current

Lead SAP ABAP Backend Developer

Current

Valero

Jul 2026 - Present (4 months)

Developed RAP-based Vehicle Master Maintenance applications and implemented managed/unmanaged RAP business objects. Enhanced O4NM, OIJNOMH, OIJNOM_LDS, and OIJPEG functionality for Fleet Availability and scheduling.

RAP Programming CDS Views AMDP Procedures OData SAP UI5 ABAP S4Hana SAP Clean Core Principles Debugging Performance Optimization

SAP ABAP Technical Lead – Senior Application Developer

Fiserv

Jul 2025 - Jun 2026 (11 months)

Architected end-to-end e-invoicing and e-payment solutions for five LATAM countries using XML transformations and proxy generation. Developed OData V2/V4 services using ABAP RAP and integrated with third-party platforms.

SAP S 4HANA ABAP RAP Programming OData CDS Views AMDP Procedures XML Mappings Proxy IDOC EDI SAP BTP Clean Core FIORI Financial Processing

SAP ABAP Technical Lead – Senior Application Developer

IBM

Apr 2024 - May 2025 (1 year 1 month)

Served as senior technical lead coordinating with global stakeholders, leading GTS enhancements and custom Adobe Forms development. Developed 11 custom Process Controller Strategies for TMS and supported ECC-to-S/4HANA upgrades.

ABAP S4Hana TMS BOPF Adobe Forms ATC SPAU SPDD SAP Notes Debugging Root Cause Analysis Technical Leadership

SAP ABAP Technical Lead

Wipro Limited

Mar 2022 - Apr 2024 (2 years 1 month)

Designed and built BRF+ applications for carrier determination logic across four global regions. Developed SAP Fiori applications with CRUDQ operations via OData services.

BRF+TMS ABAP OData FIORI SAP Web IDE Debugging Root Cause Analysis Incident Management

SAP ABAP Senior Consultant

Hitachi Vantara

Mar 2021 - Mar 2022 (1 year)

Designed and deployed a custom FV60 non-PO AP Workflow and developed inbound/outbound EDI IDoc processing. Developed custom OData services and implemented enhancements using User Exits, BAdIs, and VOFM routines.

ABAP Workflow Management FIPP IDOC EDI OData User Exits BADI'S VOFM PPF

SAP Data Migration Consultant

Syniti / BOA

Nov 2020 - Feb 2021 (3 months)

Executed non-SAP to S/4HANA data migration using BOA DSP and LTMC, covering Fixed Assets, Vendor, and Customer data loads. Optimized data extraction, transformation, and load processes.

BOA DSP SAP LTMC Data Migration S4Hana Data Profiling DCS

SAP ABAP Consultant

Deloitte Consulting

Dec 2013 - Nov 2020 (6 years 11 months)

Seven-year tenure spanning five projects including SWIFT global production support, Deloitte in-house S/4HANA migration, National Grid IS-Utilities, DART Container BODS migration, and MITAC Aerospace. Resolved Adobe Forms defects across six countries and developed custom interfaces and forms.