Ricardo Mello3 articles

Latest post Why Mirroring Production in Dev Helps You Avoid Costly Mistakes

Table of Contents The setup: A realistic aggregation scenarioThe application behind the testTesting on M0: The hidden riskTaking it to production: Same query, different outcomeReal-time metrics: Detecting the bottleneckQuery insights: The detective toolDon’t guess, let Performance Advisor show the wayResilience …

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July 28, 2025
  • Clean and Modular Java: A Hexagonal Architecture Approach

    One of the discussions that always leaves me with both doubts and excitement is the one about system architecture. Ever since I started diving deeper into programming, I’ve encountered questions like how to separate packages and modules: is it really …

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    • Ricardo Mello
    June 24, 2025
  • MongoDB Aggregation Framework: A Beginner’s Guide

    Table of Contents Aggregation pipelineAggregation stages$Match$Project$Unwind$Group$Sort$AddFieldsCombining stagesWrapping up Finding exactly the data we need isn’t always a simple task. You’ve probably faced situations where you needed to filter information, group it, and even perform calculations to produce a final result. …

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    • Ricardo Mello
    June 05, 2025
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