Vahid Aghajani

Vahid Aghajani

Jul 23

Next-Token Prediction: How an AI Actually Writes Text (Not Magic — Just Probability)

#llm #programming #softwareengineering

5 min read

Vahid Aghajani

Jul 23

Speculative Decoding, Explained: Free LLM Speed With Zero Quality Loss

#speculativedecoding #programming #softwareengineering

5 min read

Vahid Aghajani

Jul 22

Data Modeling Explained: From One Messy Table to a Real Schema

#datamodelingindataengineering #programming #softwareengineering

6 min read

Vahid Aghajani

Jul 21

GeoParquet Explained: Your Geodata Has Two Shapes (One You Edit, One You Scan)

#gis #programming #softwareengineering #database

8 min read

Vahid Aghajani

Jul 19

Connection Pooling: Why Your API Dies at 200 Users (But the DB Is at 4% CPU)

#database #programming #softwareengineering #backend

6 min read

Vahid Aghajani

Jul 18

Zero-Shot vs Few-Shot Prompting: Why Your LLM Output Keeps Breaking (and the 1-Minute Fix)

#promptengineering #programming #softwareengineering

4 min read

Vahid Aghajani

Jul 17

The N+1 Query Problem: Why 100 Products Cost 101 Queries (and Why an Index Won't Save You)

#database #programming #softwareengineering #performance

5 min read

Vahid Aghajani

Jul 16

How a Database Index Actually Works: B-Trees, Seq Scans, and the Cost Nobody Mentions

#database #sql #programming #softwareengineering

6 min read

Vahid Aghajani

Jul 16

Vector Search — how HNSW finds nearest neighbours

#hnswvectorsearch #programming #softwareengineering

6 min read

Vahid Aghajani

Jul 15

RAG vs Fine-tuning

#ragfinetuning #programming #softwareengineering

5 min read

Vahid Aghajani

Jul 13

bcrypt vs SHA-256: Why a Password Hash Should Be Slow on Purpose

#security #programming #softwareengineering #webdev

1

7 min read

Vahid Aghajani

Jul 12

Pub/Sub Explained From Scratch — One Event, Five Systems, Zero Direct Calls

#pubsub #programming #softwareengineering

5 min read

Vahid Aghajani

Jul 11

Load Balancer Explained From Scratch — How One Site Survives a Traffic Flood

#loadbalancer #programming #softwareengineering

9 min read

Vahid Aghajani

Jul 10

CORS — the attack it stops, and the one-line fix

#cors #programming #softwareengineering

5 min read

Vahid Aghajani

Jul 9

VPN vs DNS

#vpndns #programming #softwareengineering

5 min read

Vahid Aghajani

Jul 9

API Gateway Explained: One Front Door for Every Service (and Why the Bad Bot Never Gets In)

#apigateway #programming #softwareengineering #systemdesign

4 min read

Vahid Aghajani

Jul 8

ACID vs BASE

#acidvsbase #programming #softwareengineering

5 min read

Vahid Aghajani

Jul 8

Encryption vs Hashing

#encryptionhashing #programming #softwareengineering

4 min read

Vahid Aghajani

Jul 7

Access Token vs Refresh Token

#accessrefreshtoken #programming #softwareengineering

6 min read

Vahid Aghajani

Jul 6

Stateless vs Stateful

#statelessstateful #programming #softwareengineering

6 min read

Vahid Aghajani

Jul 5

Docker vs VM

#dockervm #programming #softwareengineering

4 min read

Vahid Aghajani

Jul 5

Cache vs CDN

#caching #programming #softwareengineering

5 min read

Vahid Aghajani

Jul 4

Why Your LLM Keeps Returning Garbage JSON (And How to Stop It)

#ai #python #llm #machinelearning

7 min read

Vahid Aghajani

Jul 4

Vision Language Models — When AI Learns to See and Talk (Part 3 of 3)

#ai #machinelearning #computervision #llm

13 min read

Vahid Aghajani

Jul 4

Vision Transformers — How Transformers Learned to See (Part 2 of 3)

#ai #machinelearning #deeplearning #computervision

12 min read

Vahid Aghajani

Jul 4

Semantic vs Keyword vs Hybrid Search: What Every RAG Demo Skips

#ai #machinelearning #database #postgres

6 min read

Vahid Aghajani

Jul 4

Transformers — The Architecture That Changed AI (Part 1 of 3)

#ai #machinelearning #deeplearning #nlp

13 min read

Vahid Aghajani

Jul 4

How LLM Function Calling Actually Works — From Tokens to Tool Orchestration

#ai #machinelearning #python #llm

7 min read

DEV Community

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Writing Debut

Next-Token Prediction: How an AI Actually Writes Text (Not Magic — Just Probability)

Speculative Decoding, Explained: Free LLM Speed With Zero Quality Loss

Data Modeling Explained: From One Messy Table to a Real Schema

GeoParquet Explained: Your Geodata Has Two Shapes (One You Edit, One You Scan)

Connection Pooling: Why Your API Dies at 200 Users (But the DB Is at 4% CPU)

Zero-Shot vs Few-Shot Prompting: Why Your LLM Output Keeps Breaking (and the 1-Minute Fix)

The N+1 Query Problem: Why 100 Products Cost 101 Queries (and Why an Index Won't Save You)

How a Database Index Actually Works: B-Trees, Seq Scans, and the Cost Nobody Mentions

Vector Search — how HNSW finds nearest neighbours

RAG vs Fine-tuning

bcrypt vs SHA-256: Why a Password Hash Should Be Slow on Purpose

Pub/Sub Explained From Scratch — One Event, Five Systems, Zero Direct Calls

Load Balancer Explained From Scratch — How One Site Survives a Traffic Flood

CORS — the attack it stops, and the one-line fix

VPN vs DNS

API Gateway Explained: One Front Door for Every Service (and Why the Bad Bot Never Gets In)

ACID vs BASE

Encryption vs Hashing

Access Token vs Refresh Token

Stateless vs Stateful

Docker vs VM

Cache vs CDN

Why Your LLM Keeps Returning Garbage JSON (And How to Stop It)

Vision Language Models — When AI Learns to See and Talk (Part 3 of 3)

Vision Transformers — How Transformers Learned to See (Part 2 of 3)

Semantic vs Keyword vs Hybrid Search: What Every RAG Demo Skips

Transformers — The Architecture That Changed AI (Part 1 of 3)

How LLM Function Calling Actually Works — From Tokens to Tool Orchestration