About Gabriel

Keyrus Colombia S.A.S.

• Design and maintain interactive dashboards and reports in Tableau and Power BI within the Visualization team, applying visualization and data-storytelling principles for clients in retail, telecommunications, healthcare, energy and the public sector
• Write SQL queries with joins, aggregations and subqueries to extract, transform and validate data from enterprise sources such as Snowflake, SAP HANA, BigQuery and relational databases
• Prepare and clean datasets with Python (pandas, NumPy), Power Query and Tableau Prep, ensuring consistency before analysis
• Document processes, KPI definitions and analytical methodologies to give traceability and standardization to the projects I take part in

TotalDev SAS

• Developed an interbank messaging system that receives and processes MT format files, validates encryption status, standardizes data formats, and routes messages according to SWIFT/ISO 20022 specifications
• Built backend systems for inventory management handling product catalogs with REST APIs, automated CSV import/export, role-based access control by geographic regions, and reporting modules with SQL views for query optimization
• Created QR code generation and validation systems for event management and product authentication, including pseudorandom code generation and real-time scanning interfaces
• Implemented content management systems using Laravel and Filament, allowing non-technical users to manage site content, images, and configurations autonomously

PARQ

• Maintained and evolved a microservice architecture with NestJS and TypeORM, performing code audits, refactoring legacy code, and resolving data inconsistencies in production databases
• Developed electronic invoicing middleware integrating with Colombian providers (Siigo, Alegra, SATCOM), implementing transaction logging and error handling for regulatory compliance
• Implemented pagination systems, queue-based bulk data loading, and scheduled jobs with timezone handling for automated report generation and notifications
• Documented APIs using Swagger/OpenAPI and managed deployments through Docker and Portainer with version control in Bitbucket

SEREMPRE

• Built backend systems for a corporate benefits platform serving multiple Latin American countries, developing REST APIs consumed by both mobile and web applications
• Designed complex MySQL queries and stored procedures for reporting systems, and configured automated cron jobs for user administration and scheduled notifications
• Migrated legacy systems to containerized environments using Docker (DDEV), applying database normalization and query optimization for batch processing workloads
• Integrated external APIs (Cloudinary for media management, Moodle LTI for e-learning content) and developed custom plugins for content sharing between platforms

Pedagogical and Technological University of Colombia (UPTC)

National Learning Service (SENA)