Juan Romero Domínguez

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SAP professional with over 10 years of experience in critical projects on R/3 and S/4HANA environments. Specialized in SAP IS-U processes, I am focused on designing, building, and executing complex technical solutions that provide tangible, sustainable, and maintainable results.

I combine full-stack frontend and backend experience with deep knowledge of infrastructure, networking, performance, and system operations. This allows me to tackle end-to-end projects: from functional and technical design to development, integration, deployment, optimization, and continuous support.

I also design and maintain my own production systems based on high-performance hardware, such as DELL PowerEdge R630 and MikroTik CCR2116-12G-4S+, managing every technological layer: code, servers, network, security, performance, monitoring, and availability. In web projects, I strive for measurable results, including advanced optimization and top scores in PageSpeed Insights when technical constraints allow.

As an independent developer, I also create and publish Android applications for international markets such as Google Play, Huawei AppGallery, Samsung Galaxy Store, and other mobile ecosystems. I work with a global vision, preparing apps for users across different countries, manufacturers, and devices, while managing compatibility, store listings, icons, screenshots, promotional assets, content, translations, documentation, privacy policies, legal terms, consent, analytics, stability, and release review.

I develop my own projects in Android, web, PHP, .NET, SAP, as well as automations and integrations. The images, text, designs, code, and primary assets of my projects are created and maintained by me, with the exception of third-party libraries, SDKs, APIs, or components used where appropriate.

I have experience in technical leadership, management, and team coordination, providing strategic vision, technical rigor, and a constant commitment to quality, scalability, and innovation. I focus on challenges that require advanced technical capabilities and a global vision capable of connecting business needs, software, infrastructure, and real-world operations.

SAP S/4HANA & R/3 (IS-U) Technical Lead

Deloitte · Full-time

Mar 2020 - Present · Seville, Andalusia, Spain

✘ Clients
- Acciona
- Berge Infraestructuras y Servicios Logisticos, S.L.
- Nortegas
- TotalEnergies
- UFD - Distribuidora de electricidad del Grupo Naturgy

✘ Modules SAP
SAP IS-U, SAP PM, SAP FICA, SAP MM, SAP SD y SAP BASIS.

SAP / ABAP Developer Analyst

Randstad · Full-time

Nov 2018 - Mar 2020 · Seville and surrounding area

✘ Clients
- Bidafarma

SAP / ABAP Developer Analyst

everis · Full-time

Aug 2016 - Nov 2018 · Seville and surrounding area, Spain

✘ Clients
- ServiHabitat - SVH
    • Evolutivos de R3 y FI (Responsable de área)
    • Proyectos R3; Redacción de diseños técnicos, gestión y codificación.
    • GO-FI; Soportes y resolución de incidencias.
- Ayuntamiento de Barcelona - IMH
    • Programador en el equipo de desarrollos.

✘ Modules SAP
TRM, PSCD, FI, PM, MM, SD, IS-U Migration y Basis.

✘ Conocimientos en SAP, tipos de objetos y programas
- ALV Grid Control OOP y estructurado.
- Authority-check object y roles.
- BRFplus (Business Rule Framework plus).
- Control de jobs desde transacciones, a través de report lanzador e hijos...
- Creación y gestión de logs; añadido de mensajes, borrado, guardado...
- Emails externos e internos en SAP.
- Emigall (SAP IS-U Migration Workbench).
- F4s y exits para ayudas de búsquedas.
- Gestión de solicitudes de cambio (ChaRM).
- Grabaciones Batch Input (SHDB).
- Grupos/Modules de funciones RFC.
- InfoSets y Queries SAP.
- Menús de ámbito.
- Module Pool.
- Monitorización de procesos por traza y tiempo de ejecución.
- Paralelización de procesos.
- Pool de subrutinas.
- Psobwork (PSCD: Contract Object).
- Puntos de ampliación
    • Explícitos e implícitos (Enhancement).
    • Customer Exits
    • Badis
    • BTE (Business Transaction Events)
    • Users exits
- Recursividad.
- Reports.
- SAPScripts (Programa de control y formulario).
- SmartForms y SmartStyles.
- Transport Management System (STMS), Órdenes de transporte workbench y customizing.
- Validaciones, sustituciones y reglas para FI: MIRO, MIR7, FB01, etc... (Condición, verificación, mensaje)
- Variantes en línea y fondo; estáticas y dinámicas.
- W/R ficheros(CSV/TXT/Excel).
+ Web Dynpro.
    • Ayudas de búsqueda
       - OVS (Object Value Selector)
       - Diccionario
       - Freely Programmed Input Help
    • ALV (Abap List Viewer)
    • Controles comunes.
- Otros: Elementos de datos, dominios, vistas (visualización, actualización, eventos de validación/autoinformado), tablas, estructuras, tipos, etc..

Celebration

Equipo SAP

Teacher / Mentor

Telefónica Talentum Schools

Jul 2014 - Jul 2016 · Seville and surrounding area

✘ Categories
- Block-based programming
- Augmented reality
- Electronics & Robotics

✘ Courses
- App Inventor (14-18 Years)
- BQ Kids (10-12 Years)
- Scratch (7-14 Years)
- Modelado 3D (10-18 Years)
- Kodu (12-14 Years)
- Color with Chromville (4-7 Years)
- Learn with Lightbot (4-7 Years)
- Augmented reality (5-7 Years)
- Scratch Junior (5-7 Years)
- BQ Teens (12-14 Years).

Jose María Álvarez-Pallete

Joinnovation Event

Joinnovation (Telefónica)

Intern

Servicio Andaluz de Salud - SAS

Google

Issued: Jul 2025 · Expires: Jul 2026 · ID: 156511928

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Google Cloud & NVIDIA community member

Firebase Studio Developer Community

Code Wiki

Learning

Joined the Google Developer Program

Apr 30, 2021

ARES ROMERO CAMPOS

Web Browser Extensions

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AdSpy Bot: Ad Extractor & Sequencer

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Websites

adblock.network

adspy.bot

calendario.gratis

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juanromerodominguez.dev

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volume.audio

Mobile & Tablet Apps

QR Contact

QR Email

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QR URL

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Volume Boost

About Me

Experience

SAP S/4HANA & R/3 (IS-U) Technical Lead

SAP / ABAP Developer Analyst

SAP / ABAP Developer Analyst

Teacher / Mentor

Intern

Certificates

Machine Learning Operations (MLOps) for Generative AI

Responsible AI: Applying AI Principles with Google Cloud

Master AI with Gemini

AI-Powered Shopping ads Certification

Google Ads AI-Powered Performance Certification

Google Analytics Certification

Google Ads: Measurement Certification

Display & Video 360 Certification

Campaign Manager 360 Certification

Google Ads Display Certification

Badges

Passed the quiz for the Antigravity Arcade solution

Explored the Antigravity Arcade solution

Completed Antigravity Arcade solution

Started the Antigravity Arcade solution

Track 1: Business Builder #BuildwithGemini

Track 3: Software Developer / App Builder #BuildwithGemini

Track 2: Platform IT Developer #BuildwithGemini

Explored the Living Canvas, a web-based puzzle game powered by Generative AI solution

Passed the quiz for the Living Canvas, a web-based puzzle game powered by Generative AI solution

Launched the code for the Living Canvas, a web-based puzzle game powered by Generative AI solution

Completed Living Canvas, a web-based puzzle game powered by Generative AI solution

Started the Living Canvas, a web-based puzzle game powered by Generative AI solution

GDG on Campus Menoufia University - Shibin El Kom, Egypt Member

GDG on Campus MKSSS's Cummins College of Engineering For Women - Pune, India Member

GDG on Campus Faculté Pluridisciplinaire de Nador - Nador, Morocco Member

GDG on Campus Meru University of Science & Technology - Meru, Kenya Member

GDG on Campus École Supérieure des Technologies de l'Information - Antanimena, Madagascar Member

GDG on Campus Muzaffarpur Institute of Technology - Muzaffarpur, India Member

GDG on Campus MIT Academy of Engineering - Pune, India Member

GDG on Campus Faculty of Sciences of Sfax - Sfax, Tunisia Member

GDG Bhopal Member

GDG Basilicata Member

GDG Barranquilla Member

GDG Birnin-Kebbi Member

GDG Bogor Member

GDG Bambili Member

GDG Nantes Android Member

GDG Paris Android Member

The Dutch Android User Group Member

GDG Stockholm Android Member

Lille Android User Group Member

GDG Korea Android Member