In this article, we show in practice how a complete finance app was built—from the home screen to invoice importing and detailed bill management—using Microsoft Copilot as the central development interface, connected to multiple generative AI models. You'll see the exact prompt used for each screen, understand the reasons for choosing each model (Claude 3.7 Sonnet, GPT-4o, Gemini 2.5 Pro, and ChatGPT), as well as the real challenges faced and how each issue was solved.
I run a IT services based in Brazil. Deep pool of real talent and commitment to quality in work (very different from what we hear from customers who hire developers from other countries).
The country is not cheap though. High taxation makes everything very expensive, from cars (a piece of junk costs $15,000 and up) to MacBooks (US$3,000+).
Things like cheese and wine are more expensive than in Europe (and I am talking about locally produced ones).