María Jesús Palero Martínez de los Llanos
María Jesús Palero Martínez de los Llanos

Senior Data Analyst

Open to offers · Member since 21 Oct 2026
Location
Seville, Spain
Desired salary
Unspecified
Work preference
Remote Only
Experience level
Senior

About

Professional summary

I am a Data Analyst with over five years of experience in financial services and consulting, specialising in acquiring, payment methods, financial reporting, and data-driven business analysis.

I currently support Banco Santander's GetNet acquiring business through Cognodata Consulting, where I extract, transform, and analyse data for financial closings, profit and loss reporting, POS terminal performance, and commercial target monitoring.

I have strong technical expertise in SQL Server and Excel, including complex SQL queries, CTEs, window functions, pivot tables, VBA macros, and data visualisation. I use these capabilities to provide agile responses to client requests and improve reporting processes.

My experience includes leading the technical and analytical work for Dynamic Currency Conversion on POS terminals, analysing the impact of payment trends, market changes, geopolitical events, and sector-level performance on business outcomes.

I also have experience in vehicle valuation analytics, SAS programming, database incident management, risk review, and data-quality validation within major financial institutions.

I am continuing to expand my Big Data skill set through training in Databricks, Python, PySpark, dbt, and Unity Catalog, combining a business-focused background with hands-on analytical and technical expertise.

Skills

21 capabilities

Tech stack & tools

Working toolkit

Languages & Frameworks

Experience

Career history

Data Analyst Cognodata Consulting

I work as a Data Analyst for Banco Santander's GetNet acquiring area. I extract data using SQL Server for daily, monthly, quarterly, and annual financial closings, presenting findings through dashboards, pivot tables, and Excel visualisations.

I prepare profit and loss reporting and analyse POS terminal behaviour by client and sector, including the effects of geopolitical events, disruptive situations, and changing payment habits. I lead the technical and analytical work for Dynamic Currency Conversion, monitor commercial targets, and respond directly to ad hoc client requests with advanced SQL analysis.

I also transform and optimise data processes and queries, and develop ad hoc automations through VBA macros and Visual Studio.

Junior Data Analyst Arval BNP Paribas

I worked in the Asset Valuation Department, using SAS programming to calculate vehicle leasing valuation parameters and generate pricing proposals for the sales area.

I prepared profit and loss reports and financial closing analyses, supporting the interpretation of financial results. I also managed database incidents and reviewed records to maintain data accuracy and operational continuity.

Risk Review Technician, Retail Networks BBVA

I verified the accurate recording of customer information in the internal portal to support approval processes for financial products.

I liaised with branch offices and managed incidents involving incomplete or incorrect customer data, helping ensure data quality and timely issue resolution.

Education

Learning history

EAE Business School

Master's Degree, Big Data & Analytics

Master's programme in Big Data and Analytics.

University of Córdoba

Bachelor's Degree, Business Administration and Management

Bachelor's degree in Business Administration and Management.

University of Economics in Bratislava

Erasmus+

Erasmus+ international study programme.

MBIT School

Advanced Databricks Programme, Big Data Architectures, Python, PySpark, SQL, dbt and Unity Catalog

Advanced training in Big Data architectures, Python, PySpark, SQL in Databricks, dbt, and Unity Catalog.

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