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Practical long-form guides on retrieval-augmented generation, tokenization, embeddings, vector retrieval, iOS development interviews, engineering management, team leadership, mobile application security, NID/eKYC, LangChain, LangGraph, and production multi-agent AI systems. Click any article to read the full version.
Embeddings in RAG: A Complete Practical Guide
A complete practical guide to embeddings in retrieval-augmented generation, covering semantic search, chunking, vector storage, similarity search, retrieval quality, and production tuning.
Read full articleHow Text Becomes a Numerical Vector and Is Retrieved at Query Time
A detailed journey from raw text through subword tokenization, token IDs, transformer layers, pooling, vector storage, approximate nearest-neighbor search, reranking, and retrieval of the original text.
Read full articleHow to Validate and Improve RAG Performance
A focused guide to validating RAG systems through retrieval metrics, generation quality, end-to-end evaluation, human review, LLM judges, production monitoring, and failure analysis.
Read full articleMobile Application Security Testing: A Complete Android and iOS Guide
A defensive assessment guide covering OWASP MASVS, network protection, API authorization, sessions, OTP, secure storage, runtime tampering, NID spoofing, face liveness, and security reporting.
Read full articleBuilding a Physical-Device Mobile Security Testing Lab for Android and iOS
A practical Mac, Android, and iPhone lab workflow using staging builds, ADB, Xcode, Burp, MobSF, and Frida for traffic, storage, API, NID upload, liveness, and runtime security testing.
Read full articleEngineering Manager Role: How to Lead Small and Large Engineering Teams
A practical guide to direct leadership in small teams and leadership through managers, technical leads, organizational systems, portfolio planning, and delegation at larger scale.
Read full articleiOS Developer Interview Questions and Answers: A Complete Beginner-to-Senior Guide
106 practical questions and answers covering Swift, ARC, concurrency, UIKit, SwiftUI, architecture, networking, persistence, security, testing, performance, and senior-level system design.
Read full articleRetrieval-Augmented Generation Interview Questions and Answers
A beginner-to-advanced RAG interview handbook covering fundamentals, architecture, ingestion, chunking, embeddings, vector databases, retrieval, reranking, evaluation, production, security, debugging, system design, coding, and leadership questions.
Read full articleComprehensive Guide to Accuracy Testing, Validation, and Improvement in RAG
A practical validation guide for RAG accuracy covering offline and online evaluation, golden datasets, retrieval validation, generation validation, hallucination detection, citation checks, metrics, dashboards, and continuous improvement.
Read full articleProduction-Level Vector Database: A Very Large Beginner-Friendly Guide
A beginner-to-production explanation of vector databases, embeddings, similarity search, indexing, hybrid retrieval, reranking, scaling, multi-tenancy, security, and monitoring.
Read full articleLangChain and LangGraph: A Complete Beginner to Production Guide
A production-oriented guide to LangChain and LangGraph, including agents, tools, graph workflows, RAG, memory, checkpointing, human-in-the-loop systems, security, and deployment.
Read full articleLangChain, LangGraph, and Coordinator Agents in RAG
A large practical guide explaining how LangChain, LangGraph, and coordinator-agent patterns differ, how they work together, and how each fits into production RAG architectures.
Read full articleProduction-Level Multi-Agent RAG System
A deep system-design guide for multi-agent RAG covering ingestion, retrieval, reranking, agent roles, verification, citations, prompt-injection defense, evaluation, observability, and scaling.
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