Freelancer profile translated to English.

Description

Technical Computer Engineer with over 35 years of experience in the banking sector (Banco Santander). Specialized in creating robust and secure architectures with Python and FastAPI.

My differential value is not just the code, but my ability to understand deep financial business logic: from complex bank reconciliations to the automation of reporting (P&L, balance sheets, and KPIs) and the connection of ERP/CRM systems via APIs.

My approach:

Security and Rigor: Banking quality standards applied to software development.

Intelligent Automation: I transform slow manual processes into efficient and auditable data flows.

Technological Stack: Expert in Python, FastAPI, PostgreSQL, and microservices architecture.

If you are looking for a technical solution that not only works but understands the rules of your financial business, let's talk.

Industry field of expertise

Languages

Spanish
Native or bilingual
English
Conversational

Workplace preferences

Remote only

Primarily works remotely

Freelance
Python Automation & Backend Developer (Freelance)
TECH
January 2024 - Today (2 years and 5 months)
Specialized in creating robust and scalable backend solutions using the modern Python stack.

Recent achievements:

InvoiceFlow: Development of an invoice management system with FastAPI and PostgreSQL, focused on traceability and security of financial documents.

FlowCore: Design of a modular workflow engine for automating complex logical tasks.

Technical Stack: Mastery of FastAPI, SQLAlchemy, Docker for professional deployment, and PostgreSQL for relational database management.

My approach is 'Clean Architecture', ensuring that every API developed is easy to maintain and audit."

Technical implementation:
• • REST API development with Python and FastAPI
• • Data validation and business logic implementation
• • PostgreSQL database design and management
• • Modular architecture design
• • File upload and processing via backend APIs
• • with pytest
• • API documentation with /
Python FastAPI PostgreSQL SQLAlchemy Process Automation
Banco Santander
Banking Operations Specialist
June 1990 - March 2026 (35 years and 9 months)
Over 35 years of experience at the operational heart of Banco Santander. My work not only involved managing complex banking processes but also in-depth analysis of financial data flows, reconciliations, and regulatory compliance.

This experience provides me with a business vision that a standard developer does not have: I understand the criticality of data integrity, banking security, and the importance of reporting systems (P&L, balance sheets) being 100% accurate. My transition to software development with Python stems from the need to automate these same processes that I have mastered over three decades of career, with banking quality standards.