Technical Articles

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

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BackendDevOps•3 min

Slow PostgreSQL? How to use EXPLAIN ANALYZE effectively

Learn how to troubleshoot slow PostgreSQL queries using EXPLAIN ANALYZE to identify full table scans and implement correct partial indexes.

BackendFrontend•2 min

How to avoid memory leaks in JavaScript closures

Discover why closures can retain unwanted memory in the V8 engine and learn practical strategies to keep your application's heap clean.

BackendRedes•2 min

How to use curl to test APIs and HTTP headers effectively

Master the command-line tool for HTTP requests. Learn how to simulate verbs, send JSON payloads, and debug API responses with curl.

BackendRedes•5 min

Why CORS blocks requests and how to configure your backend

Learn how the browser Same-Origin Policy works and discover how to properly configure HTTP headers on your server to allow cross-origin requests securely.

IABackend•4 min

How to structure JSON in LLMs with Pydantic for APIs

Learn how to ensure structured and consistent outputs from language models using schema validation in Pydantic for production applications.

BackendDevOps•5 min

Node.js memory leak? How to debug with heap snapshot

Learn how to capture and analyze Heap Snapshots in Node.js to isolate trapped objects in memory and protect your applications from unexpected crashes due to low RAM.

Backend•5 min

Slow database? How to create PostgreSQL indexes

Understand the internal mechanics of B-Tree indexes in PostgreSQL and learn how to apply them correctly to avoid table scans and speed up searches.

BackendDevOps•5 min

Slow database? How to audit locks and deadlocks in PostgreSQL

Learn how to inspect pg_stat_activity to identify stuck transactions in PostgreSQL and prevent severe application downtime.

Backend•5 min

How to configure secure JWT authentication and refresh tokens in FastAPI

Learn how to implement secure JWT authentication and refresh tokens in FastAPI using native dependencies and modern cryptography to protect your APIs.

BackendDevOps•2 min

PostgreSQL connection timeout? How to tune your connection pool

Is your PostgreSQL throwing connection timeouts under load? Learn how to tune your connection pool, prevent file descriptor exhaustion, and keep your application stable.