Why Cache Invalidation Is Harder Than Caching
Adding a cache to a backend system is one of the most satisfying performance improvements an engineer can make. The change is often small – point your application at Redis,
Agent Memory & State: Why Your Agent Keeps Forgetting
A supervisor and its specialists can route perfectly and still fail, if none of them remember what happened five minutes or five sessions ago.
Fine-tuning vs RAG
The meeting had been going on for forty minutes and Siddharth was starting to feel uneasy.
His company was building an internal legal assistant. Lawyers would ask it questions about case law, contract clauses, and regulatory filings. The product team had done their research. The design was solid. The retrieval pipeline was working in staging. Everything looked good.
System Design Isn’t About Components – It’s About Making Trade-offs
Spend a few weeks studying System Design and you’ll start noticing a familiar cast of characters in every architecture diagram
Learn Linux Like a DevOps Engineer: The Complete Beginner’s Guide
Imagine you’re ordering a new phone online. You complete checkout, enter your payment details, and click Pay Now. The button spins for a few seconds. No confirmation appears. Thinking the payment didn’t go through, you click again.
Why Every Backend Engineer Should Understand Idempotency
Imagine you’re ordering a new phone online. You complete checkout, enter your payment details, and click Pay Now. The button spins for a few seconds. No confirmation appears. Thinking the payment didn’t go through, you click again.
15 System Design Mistakes Every Junior Engineer Makes
Open any System Design resource and you will see the same pattern: a question like ‘Design a URL Shortener’ quickly becomes a canvas filled with Kafka, Redis, API Gateways, Load Balancers, Kubernetes, CDNs, and half a dozen databases.
Build a RAG Chatbot with Spring Boot
Vikram had read every article he could find about RAG.
He understood the concept. He could explain embeddings at a whiteboard. He knew what a vector store was, how chunking worked, and why retrieval quality depended so heavily on how you split your documents.
LangChain for Developers
Arjun had been working on the same AI feature for three weeks.
It started simple enough. His team wanted a chatbot that could answer questions about their product documentation.
AI Agents Explained
It’s 11:40 PM. Aditya is showing his manager the new AI assistant he built. “Ask it anything,” he says.
His manager types: “What were our total sales last week, and email the summary to the finance team.”