backend
- The Agent Loop: Tool Use, ReAct, and Memory from Scratch
Learn how to build a production-ready AI agent from first principles: master function calling, ReAct loops, and memory design in Python, avoiding common…
ai-agentsllm-opspythonbackendsystem-design - Why Your 16-Core Database Isn't Multithreading Queries
Your beefy database server has 16 cores, but queries feel slow. Discover why PostgreSQL might not be using parallel execution, and how to fix it.
postgresqlparallel-querydatabaseperformancebackend - RAG Accuracy: The Chunking Problem You're Missing
Boost RAG accuracy by mastering document chunking. Learn token, sentence, semantic, and parent-child strategies to fix common pipeline failures.
ragllmchunkingnlpbackend - Prompt Engineering Isn't Dead, It's Grown Up
Why structured outputs, JSON mode, and programmatic prompt optimization are making prompt engineering reliable, testable, and production-ready.
llmai-engineeringbackendprompt-engineeringdevops - PostgreSQL Query Planner Internals: How the Cost-Based Optimizer Chooses a Plan
An overview of PostgreSQL's planner: cost model, statistics, join ordering, and why the wrong plan gets chosen sometimes.
postgresqlbackendperformance - Why your database connection pool is probably misconfigured
Connection pools look simple until your app falls over at 3am. Here's the math behind sizing them correctly, and the mistakes that get everyone eventually.
postgresqlbackendperformance - Idempotency keys: the one thing that saves you when a webhook fires twice
Payment gateways retry. Networks drop responses after the work already happened. Here's how idempotency keys stop double charges without slowing anything down.
paymentsreliabilitybackend - From ILIKE '%query%' to search that feels instant
LIKE queries work fine until your table grows. The real path from a slow sequential scan to search that returns results as you type.
postgresqlsearchbackendperformance