#data-engineering

20 məqalə

#bootstrapping #data-engineering #python

From 14 Browser Tabs to 10,000 Jobs: How I Turned Web Scraping Into a Startup

Four years of building Azerbaijan's biggest job aggregator as a solo founder on $25/month infrastructure.

27 yanvar 202613 dəq.146

#data-engineering #opinion #sql

A Brief History of SQL: The Language That Refuses to Die

SQL was born in 1973 at IBM, survived the NoSQL rebellion, and now powers 55.6% of all developers. Here's how.

23 mart 202617 dəq.79

#ai #data-engineering #llm

Graph Database vs Vector Database: One Finds Similar Things, the Other Finds Connected Things

Graph databases find connections. Vector databases find similarities. When to use which, real benchmarks, and why PostgreSQL might replace both.

23 yanvar 202615 dəq.40

#ai #data-engineering #llm

AI Agents Are the New Microservices: Everyone Wants Them, Almost Nobody Ships Them

The market says $200B by 2034. The data says 95% of agent projects fail before production. Here is what actually works.

7 mart 202613 dəq.16

#ai #data-engineering #llm

RAG Is Not As Simple As They Tell You

RAG tutorials teach the easy 20%. Here are the five production problems they skip — and how to actually solve them.

15 yanvar 202617 dəq.15

#ai #database #postgresql

Vector Databases Are Overhyped — When You Actually Need One

Most teams don't need Pinecone. pgvector benchmarks, decision framework, and when dedicated vector DBs actually make sense.

27 iyun 202520 dəq.13

#ai #data-engineering #llm

Graph RAG: The $7 Knowledge Graph That Beats Standard RAG by 2x (Sometimes)

When Graph RAG doubles retrieval accuracy and when it wastes your money. Benchmarks, costs, frameworks, and a decision framework.

3 mart 202616 dəq.11

#career #data-engineering #opinion

Correlated vs Non-Correlated Subqueries: The SQL Concept That Breaks Production at 2 AM

The real difference between correlated and non-correlated subqueries, with benchmarks, optimizer behavior, and the NOT IN NULL trap.

7 yanvar 202615 dəq.8

#python #data-engineering #devops

Building Data Pipelines in 2026: Airflow vs Dagster vs Prefect

Honest comparison of Airflow, Dagster, and Prefect for data pipelines in 2026. Code examples, pricing, and what I actually use.

29 iyun 202514 dəq.8

#ai #python #llm

Build a RAG Chatbot in 30 Minutes with LangChain and Neon PostgreSQL

Build a RAG chatbot with LangChain, OpenAI embeddings, and Neon PostgreSQL. pgvector, no Pinecone, full Python code, 30 minutes.

28 mart 202614 dəq.6

#database #data-engineering #performance

ClickHouse Processes 1 Billion Rows Per Second on a Single Node — OLAP for Engineers Who Hate Complexity

A 47-second Postgres query took 120ms on ClickHouse. Columnar storage, vectorized execution, and why your analytics belong in OLAP.

18 aprel 202615 dəq.5

#python #data-engineering #performance

Polars vs DuckDB vs Pandas: The 2026 Decision Guide

Polars is 8.7x faster than pandas. DuckDB is 9.4x faster. Both handle larger-than-RAM data. Here's when to use each — with benchmarks.

5 aprel 202613 dəq.5