Django, React, Flutter, Python scripting and more
66 articles
JWT authentication works perfectly in development but starts returning intermittent "Token Expired" errors under production load. Learn the real causes, including clock drift, queue delays, load balancing, refresh token issues, and how to build resilient authentication systems in FastAPI.
Are your Django signals firing multiple times unexpectedly? Learn the common causes, including duplicate signal registration, recursive saves, development server behavior, and how to prevent duplicate executions with practical examples.
Are Flutter Navigator 2.0 deep links breaking when users press the Android Back button? Learn the common causes, routing mistakes, RouterDelegate pitfalls, and practical solutions to build reliable deep linking navigation.
A great contributor guide does more than explain how to submit code—it helps new contributors create pull requests that maintainers can review and merge quickly. Learn how to write a practical CONTRIBUTING.md that reduces onboarding friction, improves code quality, and grows your open source
Experiencing unexplained CPU spikes in your Node.js service? Learn how to use Clinic.js Flame to identify performance bottlenecks, interpret flame graphs, optimize hot code paths, and improve application responsiveness without relying on guesswork.
Is your React component showing outdated state after calling setState inside an async event handler? Learn how automatic batching works in modern React, why state updates appear delayed, and how to write predictable, bug-free state management code.
Your Django application performs well during development but slows dramatically in production as data grows. The issue may not be the ORM itself—it may be that your queries aren't using database indexes efficiently. Learn why indexes are ignored, how to identify slow queries, and how to optimize
Some of the most difficult software bugs only occur in environments you can't easily recreate. Different operating systems, browsers, hardware, configurations, dependencies, or production data can make reproduction nearly impossible. Learn practical strategies for narrowing the gap
Your Node.js service starts fast but gradually consumes more memory until response times increase or the process crashes. Heap snapshots help identify which objects remain in memory and why they aren't being garbage collected. Learn how to use heap snapshots to diagnose memory bloat and eliminate
Python generators are memory-efficient and ideal for processing large datasets, but they can fail in subtle ways. If your generator pipeline suddenly stops producing data without raising an exception, generator exhaustion is often the culprit. Learn why it happens and how to design robust, reusable
Every successful open source library eventually outgrows parts of its public API. The challenge isn't removing outdated functionality—it's helping users migrate without disrupting production systems. Learn how to deprecate public APIs responsibly while maintaining trust with your developer community
Your Django REST Framework API works perfectly after login, but users suddenly receive 401 Unauthorized errors while actively using the application. In most cases, JWT authentication isn't broken—the access token has simply expired without a proper refresh strategy.