Resources for Data & AI
Engineering Thinking.
Practical notes, guides, knowledge checks, and explanations on data platforms, AI systems, architecture, and career growth.
24 articles and counting — new content every few days.
Latest Articles
Fresh from the lab14 articles
ChatGPT Is Not Just an LLM. So What Is Actually Happening Behind It?
A DataKern perspective on the difference between models, AI applications, and what happens beyond the LLM — and why this matters for everyone learning to build with AI.
AI Engineering Is Just Prompting & LLM Calls. Is It Really That Easy?
A realistic look at what AI Engineering actually means in an enterprise environment and why the model is only one part of the problem.
AI Engineering Knowledge Check
Quick questions and answers to test your understanding of AI Engineering concepts for interviews and masterclasses.
Evaluation of LLMs
How to systematically measure the performance of AI systems and solve the
Expose Your AI Agent via FastAPI
How to turn a Python LangGraph script into a production REST API.
How to Extract Reliable JSON from LLMs
Stop writing RegEx to parse LLM outputs. Use Structured Outputs and Tool Calling instead.
How LLMs Work Internally
A high-level understanding of the Transformer architecture behind modern AI models.
Get Your Free Groq API Key
Groq gives you fast, free LLM inference — no credit card needed. Get your key in 3 minutes so you\
Get LLM API Keys (OpenRouter, etc.)
A consolidated guide to obtaining API keys for OpenRouter, Together AI, and OpenAI to build versatile AI applications.
Knowledge Check: Prompt Engineering
Test your understanding of advanced prompting techniques for AI interviews.
RAG vs. Fine-Tuning
When to use which, and why the industry frequently gets it wrong when giving LLMs custom knowledge.
Setting Up Your AI Workspace
A complete guide to installing Python, VS Code, and Antigravity IDE for your AI projects.
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