Luis Gustavo Girão Cardial

About me: Software Engineer with 4+ years of professional experience building high-throughput backend systems and cross-platform mobile applications. At FitBank, I optimized complex, mission-critical SQL queries in the core payments pipeline to eliminate 67% of records generated per PIX transaction — preventing millions of unnecessary database writes daily. That work led to my promotion to Software Architect for the company's most critical domain. My stack centers on .NET/C# and Flutter/Dart, with hands-on experience across REST API design, SQL performance tuning (SQL Server, PostgreSQL), and mobile feature development for Android and iOS — including biometric authentication and network-resilience layers. On the academic side, I co-authored a Data Structures textbook at the Federal University of Ceará, served as a teaching assistant, and built a deep-learning Computer Vision model during my undergraduate research. I'm driven by complex problems at scale and enjoy collaborating on challenging, globally distributed products.