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Abrahams Sarmiento

@abrahamssarmiento

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Junior Data Analyst at Itaú, analyzing transaction behavior to distinguish genuine activity from fraud.

Chile

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What I'm looking for

I’m looking to continue my career as a Junior Data Analyst, applying analytical judgment to behavior and patterns, handling sensitive information responsibly, and contributing to fraud detection and irregular-behavior analysis.

At Itaú, I assessed card and prepaid-account transactions using customer behavior, transaction speed, and amounts to help distinguish genuine activity from fraud. I managed alerts and cases in banking monitoring systems and developed Excel scripts with Copilot to automate routine case-management emails.

At HearingChile, I created monthly production reports used to inform purchasing decisions and automated workflows with Python and VBA. I also developed Audiassist, a mobile app project using React Native, TypeScript, and Supabase, with exploratory analysis and regression notebooks.

Experience

Work history, roles, and key accomplishments

Analista Junior de Monitoreo de Fraude

Itaú

May 2026 - Oct 2026 (5 months)

Determined potential fraud in card and prepaid account transactions using Mastercard Fraud Tool and Redbanc RBI, evaluating customer behavior, transaction speed, and amounts. Managed alerts and cases in multiple systems and developed Excel scripts with AI support to automate email generation.

Mastercard Fraud Detection Systems RBI BioCatch Consola2026 Redbank SATs Nexus CCA Mambu Excel VBA Power Automate Copilot

Técnico Audioprotesista y Soporte de Datos

HearingChile

Jan 2024 - Apr 2026 (2 years 3 months)

Designed and generated monthly production reports segmented by material, distributor, and branch. Automated workflows with Python and VBA macros, and developed a centralized inventory system in Google Sheets using IMPORTRANGE for four branches.

Python VBA Google Sheets IMPORTRANGE Data Privacy Reporting