Architecture · by area

Build it so it holds up.

System Design takes one company apart. Architecture is the other half: the concepts every AI engineer needs to build solid applications — each one explained with diagrams, step by step, and linked to the real systems that use it. Pick an area, pick a topic.

By area By industry

Finance

The architecture of an AI app →Agents, tools and MCP →

Companies: Morgan Stanley, Stripe. More industries appear as topics are published.

E-commerce

The architecture of an AI app →Evals: testing what an LLM says →Agents, tools and MCP →Prompts, context and structured outputs →

Companies: Shopify, Shopify, Shopify, Instacart. More industries appear as topics are published.

Social & jobs

The architecture of an AI app →RAG, end to end →

Companies: LinkedIn, LinkedIn. More industries appear as topics are published.

Marketplaces

RAG, end to end →Evals: testing what an LLM says →

Companies: Uber, Instacart. More industries appear as topics are published.

Software & AI tools

Evals: testing what an LLM says →Agents, tools and MCP →Prompts, context and structured outputs →

Companies: GitHub, GitHub, Manus. More industries appear as topics are published.