System Design Interview: Design a URL Shortener
The question “Design a URL shortener” is a classic system design interview problem. It appears simple on the…
Month: August 2026
6 posts
FastAPI + JWT/OAuth2 Authentication from Scratch: A Complete Guide
FastAPI has become one of the most popular Python frameworks for building modern APIs. It is fast, developer-friendly,…
Go vs Rust for Backend Services in 2026
Compare Go and Rust for backend services in 2026 with practical trade-offs, runnable examples, and a decision framework for production teams.
Build an AI Agent with Python + Ollama + FastAPI
AI agents are the next evolution beyond simple chatbots. An agent doesn’t just answer questions – it decides…
Build a RAG API with FastAPI and PostgreSQL pgvector
Retrieval Augmented Generation (RAG) combines the power of large language models with external knowledge retrieval. Instead of relying…
PostgreSQL Query Performance: EXPLAIN ANALYZE End-to-End
Mastering EXPLAIN ANALYZE completely changed how I approach database performance. Early in my engineering career, I treated slow…