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I am Nestor Jardany Serrano Rojas, a data and analytics leader based in Bogotá, Colombia. I specialize in turning data into value by leading specialized teams across data, analytics, software development, and artificial intelligence. I focus on big data processing, Python, PySpark/Scala-Spark in Hadoop environments, and cloud-native solutions. My work covers fraud analytics, risk management, and digital transformation, including the development of facial biometrics and computer vision solutions. I enjoy turning complex models into practical business outcomes, from risk scoring and fraud detection to optimization and CRM insights.…I am Nestor Jardany Serrano Rojas, a data and analytics leader based in Bogotá, Colombia. I specialize in turning data into value by leading specialized teams across data, analytics, software development, and artificial intelligence. I focus on big data processing, Python, PySpark/Scala-Spark in Hadoop environments, and cloud-native solutions. My work covers fraud analytics, risk management, and digital transformation, including the development of facial biometrics and computer vision solutions. I enjoy turning complex models into practical business outcomes, from risk scoring and fraud detection to optimization and CRM insights.

Nestor Jardany Serrano Rojas

Data Scientist, AI Developer, Full Stack Developer, +2

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I am Nestor Jardany Serrano Rojas, a data and analytics leader based in Bogotá, Colombia. I specialize in turning data into value by leading specialized teams across data, analytics, software development, and artificial intelligence. I focus on big data processing, Python, PySpark/Scala-Spark in Hadoop environments, and cloud-native solutions. My work covers fraud analytics, risk management, and digital transformation, including the development of facial biometrics and computer vision solutions. I enjoy turning complex models into practical business outcomes, from risk scoring and fraud detection to optimization and CRM insights.…I am Nestor Jardany Serrano Rojas, a data and analytics leader based in Bogotá, Colombia. I specialize in turning data into value by leading specialized teams across data, analytics, software development, and artificial intelligence. I focus on big data processing, Python, PySpark/Scala-Spark in Hadoop environments, and cloud-native solutions. My work covers fraud analytics, risk management, and digital transformation, including the development of facial biometrics and computer vision solutions. I enjoy turning complex models into practical business outcomes, from risk scoring and fraud detection to optimization and CRM insights.

Available to hire

I am Nestor Jardany Serrano Rojas, a data and analytics leader based in Bogotá, Colombia. I specialize in turning data into value by leading specialized teams across data, analytics, software development, and artificial intelligence. I focus on big data processing, Python, PySpark/Scala-Spark in Hadoop environments, and cloud-native solutions.

My work covers fraud analytics, risk management, and digital transformation, including the development of facial biometrics and computer vision solutions. I enjoy turning complex models into practical business outcomes, from risk scoring and fraud detection to optimization and CRM insights.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

Spanish; Castilian

Fluent

English

Advanced

Work Experience

Senior Manager Fraud Analytics at Scotiabank

March 1, 2020 - Present

Led a regional fraud analytics team delivering data analytics solutions across Mexico, the Caribbean, Peru, Colombia, and Chile. Directed advanced analytics and AI projects, including Chatbots and facial biometrics for fraud detection and prevention. Defined and executed use cases to optimize risk and fraud management. Contributed to digital transformation and accelerated analytics adoption. Achievements include developing and implementing analytical models that prevented CAD$28 million in gross fraud loss with a 10x ROI.

Director in Advanced Analytics & Big Data (External Consultant) at External client

October 1, 2021 - December 31, 2022

Implemented Big Data & AI projects from PoC/MVP to production. Coordinated analytics and artificial intelligence teams for technical development of various projects, with a focus on facial biometrics. Made technical and managerial decisions aligned with the company roadmap. Achievements include delivering over USD$3 million worth of AI projects (facial biometrics and computer vision) using cloud infrastructure and GCP MLOps, Kubernetes in streaming.

Director of Analytics and Technical Leader at Colsubsidio

January 1, 2018 - March 31, 2020

Led the company's information and advanced analytics team. Planned, developed, and directed BI and ABA projects. Defined and developed use cases to optimize internal and external analyses using Big Data tools. Contributed to the company’s digital transformation and built statistical models using ML and DL techniques. Achievements include methodologies leading to up to a 20% increase in sales for various products.

Senior Data Science and Big Data Consultant at Capgemini

May 1, 2017 - January 31, 2018

Consulted on the development and application of Big Data techniques. Defined, proposed, and developed use cases for Capgemini's clients using Big Data tools. Developed statistical models using machine learning and contributed to deployment across departments within the Big Data ecosystem. Achievements include the first end-to-end use case for a Credit Bureau, reducing full workflow time by 50%.

Specialized Professional – Statistical Director at Banco AV Villas

February 1, 2016 - May 31, 2017

Developed and calibrated statistical models for origination and default probability, Non-Recovered Capital, IFRS reporting, and macroeconomic modeling. Directed and managed teams for implementing statistical tools. Achievements include launching custom models for housing products and revolving loans, and designing an impact model of macroeconomic variables on portfolio deterioration to inform provisions decisions.

Senior Data Analysis Consultant at PowerData

February 1, 2015 - February 29, 2016

Conducted data analysis for various clients; implemented analyses using client-provided tools. Achievements include developing reports on sales, customer churn, movements (upgrades/downgrades), and customer characteristics; created a customer segmentation and classification model for telecommunications users.

Internship at Banco de la República

June 1, 2014 - January 31, 2015

Researched the state of economic education in Colombia; trained external personnel; presented Banco de la República functions to educational institutions; conducted econometric calculations in R and STATA; contributed to publications.