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Guilherme Dugaich de Oliveira

I'm Guilherme, a former economist turned software developer, passionate about technology, writing, and helping people learn. Today I work as a back-end developer at a fintech company, and I am interested in the topics of databases, distributed systems, scalability and performance.

A beginner’s introduction to databases, indexes and transactions

February 19, 2025October 20, 2022 by Guilherme Dugaich de Oliveira

Databases power modern applications, but their inner workings can be opaque. This post breaks down indexes and transactions—key concepts that improve performance and maintain data integrity—helping developers build faster, more reliable systems.

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