Blog
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JWT authentication complete guide — structure, access
Production-oriented JWT guide: structure, signing, access/refresh pattern, HttpOnly cookies, blacklist, CSRF, and Node.js/Next.js examples.
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Apache Kafka Complete Guide | Producers· Consumers
A complete guide to Apache Kafka for event-driven systems, covering topics, partitions, consumer groups, and delivery guarantees.
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Koa.js Complete Guide | Next Generation Node.js Framework
Complete Koa.js guide for modern Node.js applications.
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Kotlin Coroutines vs Threads | Concurrency Model· Cost
Complete comparison of Kotlin coroutines and OS threads: lightweight concurrency, memory overhead, scheduling, structured concurrency, Dispatchers.
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Kubernetes Complete Guide — Architecture, Scheduling
Deep dive into Kubernetes: kube-scheduler filtering & scoring, kube-proxy iptables/IPVS, etcd Raft and key model, controller reconciliation.
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Kubernetes Deployment with minikube | Node.js API
Run a local Kubernetes cluster with minikube, load container images, apply Deployment and Service manifests, port-forward, and debug.
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Kubernetes Pod Troubleshooting Guide
Diagnose and fix common Kubernetes pod issues. Covers CrashLoopBackOff, OOMKilled, ImagePullBackOff, Pending, and network problems with kubectl commands.
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Kubernetes Practical Guide | Pods· Deployments
Deploy and operate applications on Kubernetes.
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LangChain Complete Guide | LLM Apps, Chains, Agents, RAG
Build LLM-powered apps with LangChain. Covers Chains, Agents, Memory, RAG, and Vector Stores with practical Python examples. Start building today.
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Linux Internals & Operations: CFS Scheduling, Page Cache,
CFS scheduler, page cache and swap, VFS and dentry/inode, syscall path and observability, cgroups v2 and production SRE patterns.