David Santiago Flechas Cely Data Scientist

Analytical Audit Coordinator

Postobón

Apr 2024 - Mar 2026 (2 years)

• Lead analytics support for audit and business stakeholders, delivering customized analytical solutions that strengthen decision-making, risk assessment, and audit effectiveness. • Designed and automated data workflows using ACL Robotics, custom LLM solutions, and Databricks, reducing manual effort and audit cycle time by more than 30%. • Built executive management reports and Power BI dashboards using Python and advanced SQL, overseeing data provisioning and transformation pipelines for key operational KPIs. • Implemented predictive and statistical models for risk scoring, anomaly detection, and trend forecasting to support more data-informed audit planning.

Data Scientist

Hubtek

Apr 2022 - Apr 2024 (2 years 1 month)

As a Data Scientist, I developed AWS-based data backup pipelines and Python Lambda processes to automate ETL workflows, significantly improving data reliability. I created automated Python reporting solutions using Plotly and Matplotlib, enabling non-technical teams to access insights from MongoDB and SQL Server data more independently. Additionally, I built a predictive model to enhance client monetization forecasting, achieving 74% accuracy through machine learning and hyperparameter optimization. My role also involved creating dashboards and conducting business analysis, which are essential for translating complex data findings into actionable insights that drive strategic decision-making.

Allied Payment Analyst LATAM

Rappi

Dec 2020 - Apr 2022 (1 year 5 months)

As an Allied Payment Analyst for LATAM, I was responsible for reviewing payment transactions made to partners, ensuring accuracy and compliance, while coordinating a dedicated team of 14 professionals to enhance customer service for our Latin American partners. I successfully created and maintained dashboards using Microsoft Power BI, which facilitated data visualization and reporting. My efforts led to a reduction of incidents by over 50% and significantly increased the effectiveness of our operations. Additionally, I leveraged my experience with machine learning and Python to contribute to a project focused on fraudulent payment detection, achieving an impressive accuracy rate of 80%. This initiative not only enhanced our analytical capab

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Management Data Assistant

Makro

Jun 2020 - Dec 2020 (7 months)

As a Management Assistant at a multinational company of Dutch origin, part of the SHV group with over 25 years in the retail sector in Colombia, I played a pivotal role in enhancing operational efficiency and profitability. - Designed shelf models that maximized profitability through detailed analysis of monthly yields and heat studies, contributing to strategic decision-making. - Implemented a new shelving model that transformed the company's business approach, establishing a fast-moving medium store concept. - Additionally, I began utilizing Python for data analysis, supported by company-sponsored courses, which allowed me to enhance my analytical skills and improve data-driven decision-making processes within the organization. This i

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Practitioner in BI / Management Assistant

Makro

Jun 2019 - Jun 2020 (1 year 1 month)

- Multinational of Dutch origin, part of the SHV group, with more than 25 years in the retail sector in Colombia. Presentation of results to the CEO of the company of all projects led by the CFO monthly. - Creation of dashboards for the visualization of the sale and other business strategies that existed in the company. - Design shelf models that were profitable for the company such as its monthly yields and heat studies of these. - Implementation of a new shelving model which remodelled the company ́s way of business and initiated a new model understood as a fast-moving medium store.

David Santiago Flechas Cely

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David Santiago Flechas Cely