Notes on backend, automation, design patterns and systems, by Ahmed (Sanfor).https://sanfor2004.com/enhttps://sanfor2004.com/articles/cve-2026-96889-librsvg-use-after-free/https://sanfor2004.com/articles/cve-2026-96889-librsvg-use-after-free/A backend engineer's read of the librsvg use-after-free in nested XInclude parsing, which systems quietly render SVG, how to check what you run, and what to do before you can patch.Fri, 16 Oct 2026 00:00:00 GMTBackendSecurityVulnerabilitiesLinuxRustImage Processinghttps://sanfor2004.com/articles/cmake-explained-for-beginners/https://sanfor2004.com/articles/cmake-explained-for-beginners/Learn what CMake actually does by building a small C++20 executable, library, and test with targets, usage requirements, and out-of-source builds.Tue, 15 Sep 2026 00:00:00 GMTC++C++CMakeBuild SystemsDeveloper Toolshttps://sanfor2004.com/articles/cpp-discord-bot-dpp/https://sanfor2004.com/articles/cpp-discord-bot-dpp/Create a modern C++ Discord bot with DPP, CMake, slash commands, safe token handling, and a practical path from local testing to deployment.Tue, 15 Sep 2026 00:00:00 GMTC++C++DiscordDPPCMakeBotshttps://sanfor2004.com/articles/electron-nextjs-desktop-app/https://sanfor2004.com/articles/electron-nextjs-desktop-app/Package a Next.js static export inside Electron with TypeScript, a custom application protocol, isolated preload code, narrow IPC, and no embedded web server.Tue, 15 Sep 2026 00:00:00 GMTProject EngineeringElectronNext.jsTypeScriptDesktop AppsSecurityhttps://sanfor2004.com/articles/redis-internals/https://sanfor2004.com/articles/redis-internals/Follow a Redis command through the event loop, data structures, expiration, eviction, persistence, and replication without reducing Redis to 'just a cache.'Tue, 15 Sep 2026 00:00:00 GMTSystemsRedisDatabasesBackendSystemsPerformancehttps://sanfor2004.com/articles/design-patterns-overview/https://sanfor2004.com/articles/design-patterns-overview/Start here: all 23 GoF design patterns, their categories and scope, with illustrated Python and C++20 lessons.Sat, 12 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsPythonC++ArchitectureSoftware Engineeringhttps://sanfor2004.com/articles/design-pattern-abstract-factory/https://sanfor2004.com/articles/design-pattern-abstract-factory/Create compatible families of objects without coupling the client to concrete classes.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsCreational PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-adapter/https://sanfor2004.com/articles/design-pattern-adapter/Translate one interface into another interface the client already understands.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsStructural PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-bridge/https://sanfor2004.com/articles/design-pattern-bridge/Separate an abstraction from its implementation so both dimensions can vary independently.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsStructural PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-builder/https://sanfor2004.com/articles/design-pattern-builder/Construct a complex object step by step while allowing different final representations.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsCreational PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-chain-of-responsibility/https://sanfor2004.com/articles/design-pattern-chain-of-responsibility/Pass a request through an ordered chain until a handler processes it or the chain ends.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsBehavioral PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-command/https://sanfor2004.com/articles/design-pattern-command/Represent a request as an object so it can be queued, logged, retried, or undone.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsBehavioral PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-composite/https://sanfor2004.com/articles/design-pattern-composite/Treat individual objects and nested groups through the same component interface.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsStructural PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-decorator/https://sanfor2004.com/articles/design-pattern-decorator/Add responsibilities by wrapping an object with components that share its interface.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsStructural PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-facade/https://sanfor2004.com/articles/design-pattern-facade/Offer a focused entry point to a complex subsystem without removing lower-level access.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsStructural PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-factory-method/https://sanfor2004.com/articles/design-pattern-factory-method/Let subclasses or specialized creators decide which concrete product to instantiate.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsCreational PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-flyweight/https://sanfor2004.com/articles/design-pattern-flyweight/Share repeated intrinsic state while keeping context-specific state outside the shared object.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsStructural PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-interpreter/https://sanfor2004.com/articles/design-pattern-interpreter/Represent a small grammar as objects that evaluate expressions in a context.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsBehavioral PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-iterator/https://sanfor2004.com/articles/design-pattern-iterator/Traverse a collection without exposing how that collection stores its elements.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsBehavioral PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-mediator/https://sanfor2004.com/articles/design-pattern-mediator/Centralize complex collaboration so peer objects do not depend directly on one another.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsBehavioral PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-memento/https://sanfor2004.com/articles/design-pattern-memento/Capture and restore an object’s state without exposing its internal representation.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsBehavioral PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-observer/https://sanfor2004.com/articles/design-pattern-observer/Notify a changing set of subscribers when a subject emits an event or changes state.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsBehavioral PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-prototype/https://sanfor2004.com/articles/design-pattern-prototype/Create new objects by copying an existing configured prototype.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsCreational PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-proxy/https://sanfor2004.com/articles/design-pattern-proxy/Stand in for another object to control access, loading, location, or instrumentation.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsStructural PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-singleton/https://sanfor2004.com/articles/design-pattern-singleton/Provide one controlled instance and a global access point—while understanding the coupling it creates.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsCreational PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-state/https://sanfor2004.com/articles/design-pattern-state/Change an object’s behavior when its internal state changes by delegating to state objects.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsBehavioral PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-strategy/https://sanfor2004.com/articles/design-pattern-strategy/Package interchangeable algorithms behind one interface and choose among them by composition.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsBehavioral PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-template-method/https://sanfor2004.com/articles/design-pattern-template-method/Define an algorithm’s stable skeleton while allowing selected steps to vary in subclasses.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsBehavioral PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/design-pattern-visitor/https://sanfor2004.com/articles/design-pattern-visitor/Add operations across a stable set of element types without placing every operation on those elements.Fri, 11 Sep 2026 00:00:00 GMTDesign PatternsDesign PatternsBehavioral PatternsPythonC++Software Engineeringhttps://sanfor2004.com/articles/360vision-nextjs-virtual-tour-studio/https://sanfor2004.com/articles/360vision-nextjs-virtual-tour-studio/How I built 360Vision with Next.js, Three.js, interactive floor plans, angular hotspots, and local JSON storage for connected real-estate tours.Wed, 09 Sep 2026 00:00:00 GMTProject EngineeringNext.jsTypeScriptThree.js360VisionVirtual ToursBackendProduct Engineeringhttps://sanfor2004.com/articles/ai-reference-review-loops-mint-woodland-pet/https://sanfor2004.com/articles/ai-reference-review-loops-mint-woodland-pet/A first-person case study on turning a visual reference into an original Windows desktop companion through AI-assisted asset generation, deterministic sprite preparation, UI matching, and repeatable visual review.Sat, 05 Sep 2026 00:00:00 GMTAI EngineeringAI-Assisted DevelopmentGenerative AIPrompt EngineeringReference-Based DesignVisual QAIterationPixel ArtSprite AnimationWindows DevelopmentC++Win32Desktop CompanionUI DesignSoftware EngineeringMint Woodland Pethttps://sanfor2004.com/articles/designing-a-reliable-background-job-pipeline/https://sanfor2004.com/articles/designing-a-reliable-background-job-pipeline/A long-form systems note about queues, retries, idempotency, observability, and operating background work safely in production.Thu, 03 Sep 2026 00:00:00 GMTBackendBackendQueuesReliabilityObservabilityArchitecture