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Juan José Jaime AguilarJJ

Juan José Jaime Aguilar

SAP Senior Consultant | FI-CA | BRIM | FI | ABAP

€400/day
Sevilla, ES
8-15 years

Average response time: 1 hour

About Juan José

I’m a SAP FICA and BRIM CI specialist with a hybrid background: deep functional expertise paired with strong ABAP development skills. This combination helps me diagnose issues quickly, design cleaner solutions and bridge the gap between business, functional and technical teams.

I’ve worked extensively with S/4HANA systems, supporting clients in the utilities, telecommunications and retail sectors across full project lifecycles. My experience covers requirements analysis, solution design, configuration, development, testing, data migration and incident management. I’m particularly strong in FICA processes, BRIM Convergent Invoicing, FI integration and ABAP coding.

I’m known for identifying root-cause issues and proposing practical, scalable solutions. Highlights include:
• Designing a process to de-archive written-off invoices, cancel them and regenerate clean postings.
• Detecting and resolving a batch error that deleted a month of payment data, enabling full recovery.
• Leading end-to-end FICA data migration for a complex brownfield S/4HANA implementation.
• Re-implementing and optimizing dunning, payments and payment plans for a client with extensive custom code.

My goal in every engagement is simple: deliver stable, efficient and maintainable SAP solutions. With a 360° view of processes, system architecture and S/4HANA capabilities, I help organizations reduce complexity, increase reliability and accelerate delivery through smarter design.

Spanish native, fluent in English.

Open to SAP FICA, BRIM CI, FI and ABAP opportunities—across functional, technical or solution architecture roles.
  • Spanish

    Native or bilingual

  • English

    Fluent

Can work on-site
Sevilla (up to 50km)

Experience

  • Accenture
    SAP IS-U | FI-CA | ABAP Consultant
    ENERGY AND UTILITIES
    June 2024 - September 2025 (1 year and 3 months)
    Madrid, Spain
    Client: Repsol
    Stepped in as project team replacement and kept FICA system live, integrated with IS-U Billing, SD, and Salesforce, handling critical incidents in high-availability environments.
    Fixed critical production issues: data loss in collections, batch chain failures, and duplicates, preventing billing outages for millions of customers.
    Designed and rolled out custom collections and dunning solutions, optimizing external app integrations and boosting process performance by 45%.
    Built mass tax recovery process in IS-U: extracted archived data from external system, validated, and re-invoiced, recovering over €3M in pending revenue.
    SAP FICA SAP IS-U SII SAP ABAP SAP FI
  • Total Energies
    SAP FICA & ABAP Consultant. IT advisor
    ENERGY AND UTILITIES
    January 2024 - October 2024 (9 months)
    Oviedo, Municipality of Oviedo, Asturias, Spain
    Collaborated as a key liaison between business stakeholders and vendors, validating and refining the proposed solution.
    Conducted in-depth analysis of existing debt workflows, proposing enhancements that reduced processing time.
    Redesigned SAP FI-CA debt collection agency integration, optimizing system performance and scalability.
    SAP FICA ABAP OO SAP ABAP Business analysis SAP IS-U
  • Atos
    SAP FI-CA & FI &ABAP Consultant
    ENERGY AND UTILITIES
    March 2021 - December 2023 (2 years and 9 months)
    Seville, Spain
    • • Contributed to SAP S/4HANA greenfield implementation for utilities, configuring full FICA scope (payments, dunning, security deposits) per Spanish regulatory B2B/B2C requirements.
    • • Post-go-live AMS: Resolved critical incidents in FICA integrated with IS-U, SD, and Salesforce, maintaining >98% SLA for high-volume operations (millions of contracts).
    • • Designed and developed new features: innovative payment methods, mass customer compensation processes, batch chain optimization, and Z-process performance improvements.
    • • Partnered directly with ENDESA business stakeholders, translating regulatory requirements into SAP solutions and driving operational enhancements.
    SAP FICA SAP IS-U SAP ABAP Debugging Business analysis

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Education

  • Greenfield, Brownfield
  • SAP Billing and Revenue Innovation Management - Usage to Cash
    SAP Billing and Revenue Innovation Management - Usage to Cash

Skill set

Categories