Mapped and refined tax rules to ensure accurate ICMS tax rates based on origin and destination of distribution centers. Implemented a multi-part upload solution for AWS S3 enabling secure transfer of files up to 5GB and removing previous upload limitations. Debugged and implemented enhancements to improve platform stability, usability, and overall user experience. Developed a new checkout feature where credit card interest directly influences ICMS tax rates, ensuring fiscal compliance and precise tax calculations. Results included improved tax accuracy across various business and checkout scenarios, secure large-file uploads, enhanced platform usability and stability, and reduced tax calculation failures related to checkout processes.

Full Stack PHP Web Developer at ARQ MEDES Software Solutions

September 1, 2023 - January 1, 2025

Contributed to the development and migration of the banking integration module and modernization of legacy investment and treasury management systems with a focus on automation, accuracy, and operational efficiency. Led the implementation of a banking inquiry module for remittances, returns, and key financial analytics, significantly improving tracking and financial control. Guided the migration of a legacy system to PHP, optimizing reconciliation operations and implementing customized treasury queries for real-time financial analysis and automated discrepancy adjustments. Managed an investment portfolio control project, designing data pipelines for normalization and storage of financial data from sources including B3, CVM, Anbima, and the Central Bank of Brazil. Built automated mechanisms for updating financial indices, delivering a consolidated and dynamic real-time view of assets. Participated in risk analysis initiatives, developing a heat map to identify and mitigate critical risk

Full Stack PHP Web Developer at FLAROS SYSTEMS

March 1, 2017 - January 1, 2023

Led the migration of a legacy system from Clipper to PHP, enabling scalability for multiple companies and eliminating the need for individual database installations. Designed and implemented login, permission control, and optimized reporting modules using Composer and modern PHP standards. Automated Nginx server setup using shell scripts, reducing deployment time and human error. Developed REST APIs and Web Services to expand system integration capabilities, and optimized MongoDB queries for React Native applications. Implemented performance improvements in accounting modules, reducing data loading time by 60% and enhancing reporting performance through query restructuring. Led the integration of electronic scales for supermarket retailers, ensuring accurate real-time synchronization of measured data. Provided onboarding and mentorship to two junior developers, improving code quality and promoting best practices within the team.