Discover valuable and hands-on software development articles by Daniel Okoronkwo. Learn about Node.js, Golang, algorithms, and modern web development.https://www.danielokoronkwo.com/en-ushttps://www.danielokoronkwo.com/post/announcing-version-1-0-0-of-corelens-the-node-js-observability-sdk/https://www.danielokoronkwo.com/post/announcing-version-1-0-0-of-corelens-the-node-js-observability-sdk/Corelens is an observability SDK for Node.js applications. It gives you structured logs, application metrics, HTTP metrics, runtime metrics, traces, and production-aware exporters without forcing you to wire every observability concern by hand on day one.Sun, 10 May 2026 00:00:00 GMTBackendDaniel Okoronkwohttps://www.danielokoronkwo.com/post/nodejs-flushwaiters-pattern-for-graceful-shutdown/https://www.danielokoronkwo.com/post/nodejs-flushwaiters-pattern-for-graceful-shutdown/The FlushWaiters Pattern is used in a node.js system where graceful shutdown is non-negotiable. You need a way to tell the Node.js process to no exit until a buffered work is finished.Fri, 24 Apr 2026 00:00:00 GMTBackendDaniel Okoronkwohttps://www.danielokoronkwo.com/post/buildin-a-mental-model-for-azure-iam/https://www.danielokoronkwo.com/post/buildin-a-mental-model-for-azure-iam/Unlike AWS, Microsoft has a suite of products which benefit from a unified identity system. Microsoft Identity System and its correlation with Azure Cloud is confusing. This article helps you get it right.Mon, 06 Apr 2026 00:00:00 GMTCloudDaniel Okoronkwohttps://www.danielokoronkwo.com/post/kafka-on-kubernetes/https://www.danielokoronkwo.com/post/kafka-on-kubernetes/An honest account of what Kafka is, why ZooKeeper had to go, and what it actually takes to run a KRaft cluster on Kubernetes without it silently falling apart.Wed, 18 Feb 2026 00:00:00 GMTKubernetesDaniel Okoronkwohttps://www.danielokoronkwo.com/post/memory-caches-cpus-a-practical-mental-model/https://www.danielokoronkwo.com/post/memory-caches-cpus-a-practical-mental-model/A storied, first-principles guide to understanding memory, layout, and performance in modern computer systems.Sat, 03 Jan 2026 00:00:00 GMTSystems EngineeringDaniel Okoronkwohttps://www.danielokoronkwo.com/post/from-ssl-to-tls-a-passport-adventure-through-the-internet/https://www.danielokoronkwo.com/post/from-ssl-to-tls-a-passport-adventure-through-the-internet/Whenever you send or receive information on the Internet, it passes through a network of multiple computers to reach the destination. Historically, any of these computers could read your data, because it was not encrypted.Fri, 03 Oct 2025 00:00:00 GMTInternetDaniel Okoronkwohttps://www.danielokoronkwo.com/post/understanding-ssl-tls-and-certificates-a-practical-deep-dive/https://www.danielokoronkwo.com/post/understanding-ssl-tls-and-certificates-a-practical-deep-dive/Whenever you send or receive information on the Internet, it passes through a network of multiple computers to reach the destination. Historically, any of these computers could read your data, because it was not encrypted.Fri, 03 Oct 2025 00:00:00 GMTInternetDaniel Okoronkwohttps://www.danielokoronkwo.com/post/multi-service-observability-setup-with-open-telemetry/https://www.danielokoronkwo.com/post/multi-service-observability-setup-with-open-telemetry/Building applications in a distributed manner brings a ton of complexities especially when dealing with application health and performanceWed, 10 Sep 2025 00:00:00 GMTObservabilityDaniel Okoronkwohttps://www.danielokoronkwo.com/post/frequently-asked-questions/https://www.danielokoronkwo.com/post/frequently-asked-questions/Frequently asked interview question and answer by Daniel OkoronkwoMon, 04 Aug 2025 00:00:00 GMTCareerDaniel Okoronkwohttps://www.danielokoronkwo.com/post/golang-interfaces/https://www.danielokoronkwo.com/post/golang-interfaces/Interfaces in Go are like the entrance exams to tech's elite playground but with a twist.Tue, 29 Jul 2025 00:00:00 GMTGolangDaniel Okoronkwohttps://www.danielokoronkwo.com/post/reverse-engineering-nigeria-nuban-system/https://www.danielokoronkwo.com/post/reverse-engineering-nigeria-nuban-system/How I turned a banking document into a bank identification tool using JavaScript and some caffeine-fueled determination.Wed, 16 Jul 2025 00:00:00 GMTFintechDaniel Okoronkwohttps://www.danielokoronkwo.com/post/why-your-nodejs-stream-suddenly-stops-working-after/https://www.danielokoronkwo.com/post/why-your-nodejs-stream-suddenly-stops-working-after/If you’ve been working with Node.js streams for a while, you're likely familiar with the EventEmitter-based API.Mon, 07 Jul 2025 00:00:00 GMTNodejsDaniel Okoronkwohttps://www.danielokoronkwo.com/post/building-an-exif-parser-in-golang/https://www.danielokoronkwo.com/post/building-an-exif-parser-in-golang/You know those sneaky little pieces of metadata embedded in images? Like the date you took the photo, the model of the cameraMon, 26 May 2025 00:00:00 GMTGolangDaniel Okoronkwohttps://www.danielokoronkwo.com/post/the-chronicles-of-learning-new-thing/https://www.danielokoronkwo.com/post/the-chronicles-of-learning-new-thing/Each time we set out to master something new, the process becomes an adventure of self-discovery, growth, and most times, frustration.Mon, 17 Feb 2025 00:00:00 GMTInspirationDaniel Okoronkwohttps://www.danielokoronkwo.com/post/nodejs-worker-threads/https://www.danielokoronkwo.com/post/nodejs-worker-threads/How do worker threads work in Node.js? Why should you use it?Wed, 05 Jun 2024 00:00:00 GMTBackendDaniel Okoronkwohttps://www.danielokoronkwo.com/post/understanding-portable-operating-system-interface-posix/https://www.danielokoronkwo.com/post/understanding-portable-operating-system-interface-posix/How do different operating systems maintain interoperability? Understanding how POSIX makes this possibleThu, 01 Feb 2024 00:00:00 GMTOperating SystemDaniel Okoronkwohttps://www.danielokoronkwo.com/post/understanding-the-term-always-favour-composition-over-inheritance/https://www.danielokoronkwo.com/post/understanding-the-term-always-favour-composition-over-inheritance/What do we mean by “Favour Composition Over Inheritance” in Object Oriented DesignWed, 31 Jan 2024 00:00:00 GMTDesign PatternsDaniel Okoronkwohttps://www.danielokoronkwo.com/post/detect-linkedlist-cycle-leetcode-solution-with-explanation-and-illustrations/https://www.danielokoronkwo.com/post/detect-linkedlist-cycle-leetcode-solution-with-explanation-and-illustrations/How to Detect a cycle in a LinkedList with Explanation and IllustrationsTue, 27 Sep 2022 00:00:00 GMTData StructuresDaniel Okoronkwohttps://www.danielokoronkwo.com/post/how-to-implement-apple-oauth-2/https://www.danielokoronkwo.com/post/how-to-implement-apple-oauth-2/Complete Guide to Implementing Apple OAuth 2.0 Authentication In an Express ApplicationSun, 01 May 2022 00:00:00 GMTWeb DevelopmentDaniel Okoronkwo