My Portfolio

Senior Delphi Developer
e-Core (Client from Texas, USA) – Remote Aug 2025 – Jan 2026
Member of a four-developer team working on a compound pharmacy management system used in the USA, Canada, and Australia. Legacy system developed in 2005 using Delphi 6 and Firebird 2.5.
● Bug fixing and system enhancements
● Performance analysis and optimization
● Proposed and implemented solution that fixed critical performance issues where 3 SENIOR developers from USA can’t solve before.

Tech Lead
Receb Desconto – Remote Jan 2024 – 2025
Led a remote team of two developers and one QA analyst in a freelance project.
● Backend and API developed using Laravel
● Two mobile applications built with Delphi FireMonkey
● Database: MySQL
● Weekly sprint meetings, task tracking, and delivery management
● Ensured deadlines and project quality

Systems Analyst – Diebold Nixdorf Sep 2023 – Mar 2024
Worked on a Factory Management System, developing the Zero Safe Room Control module.
● Requirements gathering and business rule definition
● Data modeling
● Development using Delphi XE2 and Delphi Alexandria
● Database: MS SQL Server 2014

Delphi Developer
SEMAD – Manaus City Hall Mar 2011 – 2021
Worked on a complete Government ERP system.
● Initial development in Delphi 7 with a custom framework
● Databases: Oracle, Firebird, MySQL
● Migration of desktop system to web using PHP and Bootstrap
● Inventory module saved over R$ 5 million per year in losses in the public health sector
● Maintenance of a biometric time attendance system with online/offline operation and auto-update

Tech Lead & Co-Founder – Bittwork Business Solutions Apr 2005 – Oct 2009
Co-founded the company and led a team of two Delphi developers and one QA analyst.
● Designed and developed a full ERP system
● More than 1,500 customers and 2,000 installations across Brazil
● Delphi 7 → Delphi Berlin migration
● Database: Firebird
● Electronic invoicing (NF-e, NFC-e, SAT CF-e)
● Integration with Caller-ID devices via USB
● Focused on bottled gas and mineral water distribution companies