Technical Articles

Practical articles, in-depth tutorials, and architectural insights on software engineering, AI, and systems.

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UTF-8 versus ASCII Encoding in Configuration Files: The Hidden System Impact

Learn how choosing between UTF-8 and ASCII encodings directly impacts configuration file reading, preventing silent failures and unexpected behaviors in modern servers and applications.

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Backend•12 min

Payment Idempotency: Unique Keys and Concurrency Control

Learn how to design resilient payment systems using idempotency keys to prevent duplicate charges under high concurrency and network failures.

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Backend•12 min

OpenTelemetry Collector: How to Centralize Telemetry from Multiple Applications

Learn how to unify logs, metrics, and traces from distributed systems using the OpenTelemetry Collector, reducing infrastructure costs and operational complexity.

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BackendArquitetura•14 min

Table Partitioning and Partial Indexing in PostgreSQL at Scale

Learn how native table partitioning and partial indexing in PostgreSQL solve performance bottlenecks in databases processing billions of rows under high write and read loads.

RedesBackend•12 min

How Brute Force Attacks Work and Which Mechanisms Block Them Effectively

Understand the mechanics behind automated password guessing on the internet and explore the engineering defenses that protect modern systems from unauthorized access.

BackendRedes•12 min

Passkeys vs Passwords: How Secretless Authentication Works

Learn how passkeys replace traditional passwords using public-key cryptography and biometrics to eliminate credential theft on servers.

BackendEngenharia•12 min

How a Password Manager Works: Cryptography, Local Vaults and Synchronization

Explore the cryptographic mechanisms, local vault operations, and secure synchronization strategies behind a modern password manager.

BackendArquitetura•12 min

How a Digital Signature Works and Why It Is Not Ordinary Encryption

Discover the engineering behind digital signatures, understanding why they ensure authenticity rather than hiding data contents.

BackendEngenharia•12 min

SHA-256, SHA-3, and BLAKE3: Differences, Performance, and Practical Choice

Understand the real differences between SHA-256, SHA-3, and BLAKE3 in modern software engineering. Learn how to choose the right algorithm balancing performance, security, and practical application impact.

BackendEngenharia•12 min

How Hash Functions Work and Where They Are Used in Practice

Understand the mathematics behind hash functions, how they transform data of any size into unique identifiers, and where they are applied in cryptography, databases, and networks.

BackendRedes•12 min

Symmetric vs Asymmetric Encryption: Differences, Mechanism and Use Cases

Explore the fundamental differences between symmetric and asymmetric encryption, understanding how each model secures data in transit and at rest in modern infrastructure.

RedesBackend•12 min

PKI: How Public Key Infrastructure Works

Explore the fundamentals of Public Key Infrastructure (PKI), the cryptographic framework responsible for ensuring security, authenticity, and confidentiality in modern internet communications.

RedesBackend•12 min

DKIM Explained: How a Digital Signature Helps Validate Emails

Explore how DKIM utilizes public key cryptography to digitally sign emails, ensuring content integrity and preventing sender spoofing frauds across the internet.