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Makingcode

Practical notes on architecture, trade-offs, and code you can run in production.

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Technical blog by Andrés Esquivel

© 2026 · Built with Next.js

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Domain Events: The Contract That Decouples Without Breaking the DomainJun 25, 2026
Internal Ledger: One Transfer, Two Entries, Zero Negative BalancesJun 24, 2026
Modeling Money in Code: Cents, bigint, and Why float Doesn't Belong in a Banking CoreJun 23, 2026

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Backend Cloud & AWS Architecture Algorithms Security & Crypto AI & Applied ML DevOps & Platform

Cloud & AWS

AWS primitives in practice — Lambda, ECS, Cognito, S3, and IAM with least privilege. Real trade-offs, not console screenshots.

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New articles are on the way — including a NestJS Enterprise series. Meanwhile, explore my portfolio or learn more about me.

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Cloud & AWS | Making Code

Series

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Fintech Core Platform6 articles
NestJS Enterprise4 articles