Juan de Dios Trejo

IT professional with 9+ years focused on development and support of enterprise applications.
Currently, SAP ABAP Senior Developer with 6+ years on development and support experience in HXM, HCM, FI/CO, SD, MM, CML and EWM.
Experience in Web Design using frontend: HTML5, CSS, JavaScript and backend: ASP.NET connected with some databases: SQL Server, MySQL, ORACLE, creation of interfaces using own Web services using Visual Studio between SAP and several systems.
Worked effectively with cross-functional design teams to create development solutions and significantly improved overall functionality for different sectors.

DYCSI Sep 2023 – Currently Remote.
SAP ABAP Technical Consultant for Banking Sector
Reporting to: Project Manager
Activities:
Development of applications, reports and process using ABAP. My skills are focus on following SAP modules: FICO and CML using: ALV, Call Transaction, Authority Checks, Data Dictionary, Create Z Tables, Logical Views, Open SQL, Call Method, Submit Jobs, BAPIs, Maintenance Views, Smart forms, RFC.
Participation in a project in which SOAP services for the integration of financial data (contracts, credits, customers, amortizations, etc.) between SAP and Cronos ERP were presented.
Consumption of third-party REST services for CFDI, QeQ, Odoo and QR.
Implementation of classes for consumption of third-party QeQ API Rest in several clients and several programs improving the modularity and maintainability of the code.
Use of ALV IDA to improve reporting performance.
Developed code to extended/modified existing SAP functionality, and/or transformed data and processes from legacy systems into SAP.
Analysis of change requests related to SAP, configuration, unit tests, quality assurance and deployment to productive environment.
Maintenance and enhancements for applications under my responsibility.
Functional Experience: SAP CML
Environments & Tools: SAP ECC 6.0
Seidor México Feb 2023 – Aug 2023 Remote.
SAP ABAP Technical Consultant for different sectors.
Reporting to: ABAP Technical Lead
Activities:
As an ABAP Consultant I developed the Enhancements, Badis and user exits needed to connect Success Factors Employee Central to SAP HCM System.
Develop new program to generate CSV´s for the migration and initial data loading of Success Factors Foundation Objects and Personnel Data.
I oversaw the requirements needed to install the Add ons, creation of the interface users and the needed permissions of the SFAPI to communicate with OData.
Exposure of OData services to be consumed by Success Factors and third party systems.
Had communication with the CPI Consultant for everything needed for security material, Job programming.
Built End to End interfaces between SAP Success Factors Employee Central, SAP Success Factors Employee Central Payroll (HXM), S4Hana (FICO), SAP Business One and No SAP System. This includes configuration and deployment of interfaces (SFTP, OData, ALE, and CPI).
Functional Experience: SAP HCM, SAP Success Factors.
Environments & Tools: SAP ECC 6.0, Success Factors - Employee Central, Success Factors – Time Management.
Grupo Comercial Control Jul 2017 – Feb 2023 Monterrey, N. L. México.
SAP ABAP Technical Consultant for Retail Sector
Reporting to: Application Development Coordinator
Activities:
Development of applications, reports and process using ABAP. My skills are focus on following SAP modules: HCM, MM, SD, FICO, EWM using ( data dictionary, maintenance views with events, authority check, call transaction, batch input , dialog programming, report programming, dynamic programming, submit, ALV Grid, ALV List, ALV Tree, ALV Factory, ALV OO, IDOC’s, Open SQL, read and create files on local and server ( Excel, text, CVS, XML ), strans, smart forms, RFC, BAPI’s, BAdIs, enhancement, user exit, BTE, creation and consumption of proxy with web services ( WSDL ) and interfaces ( PI ) ).
Solid development skills involving: infotypes and payroll manipulation.
Use logical database (PNP, PCH).
Experience in participating in activities as add custom field in infotypes and creation custom infotypes.
Involved in processes as send emails and interaction of executing external commands.
Read data from archiving files (MM_EKKO, FI_DOCUMNT).
Expertise in debugging.
Worked on tools as Performance Trace, Runtime Analysis and Code Inspector for Performance tuning.
Experience in working on support to functional consultants.
Interacting with users and solving their day-to-day operational problems.
Good knowledge of requirements gathering.
Basic knowledge in Object Oriented Programming, Web Dynpro and ABAP 7.40
Participation in:
 Payroll, Organizational Management, Personnel Administration, Time Management, Implementation of version 3.3 and 4.0 of CFDI “Z”, Rules and schemas, Wage Types, Absences Quotas, Integration experience with Kronos Time Management (HCM).
 Implementation of version 3.3 of CFDI, Credit Note, Payment Complement, Global Invoice, CFDI Transfer, Bill of Lading Supplement (locally known as Complemento Carta Porte), Intercompany Services Invoicing, Posting in Accounting (FICO).
 Insert / Update (Customer Master, Sales Order, Delivery, Billing Document, Electronic Invoicing), Automation of goods movements, Integration experience with HCL E-Commerce (SD).
 Warehouse report with pricing list, Updating master data of the materials with ARTMAS IDOC (MM).
 Control the Warehouse inbound and outbound processes and movement of goods in the Warehouse (EWM).
Functional Experience: SAP HCM, MM, SD, FI-CO, EWM
Environment: SAP ECC 6.0
APYS Jul 2015 – Jul 2017 Monterrey, N. L. México.
Web Developer to Support Grupo Comercial Control Corporation
Reporting to: Application Development Coordinator
Activities:
Working as WEB Developer in a work team to support several customer requirements about WEB developments.
Analysis, Design, and development of interactive websites for the suppliers and clients.
Designing the websites using HTML, CSS, Bootstrap and Javascript.
Developing using Visual Studio IDE and Visual Basic Language for the Backend
Creating queries using PL/SQL with different databases such as ORACLE, SQL Server, MySQL
Webservices creation using SOAP and Restful messaging protocol to connect the websites to SAP Applications.
Background tasks creation for the automation of process.
Environments: Visual Studio (Visual Basic, ASP.NET), ORACLE, SQL Server, MySQL.

FACULTAD DE CONTADURIA PUBLICA Y ADMINISTRACION August 2012 – December 2016 Monterrey, N. L. México.
Bachelor of Information Technology
SAP CERTIFIED DEVELOPMENT ASSOCIATE February 2023 Monterrey, N. L. México.
ABAP with SAP NetWeaver 7.50