The Rails Drop

Part 5 – What Are Chunks?

Large documents are split into smaller pieces. Example: Instead of: Employee Handbook(350 pages) Split into: Chunk 1Company Introduction---------------Chunk 2Leave Policy---------------Chunk 3Medical Insurance---------------Chunk 4Travel Policy Now retrieval becomes efficient.

Part 6 – What Are Embeddings?

This is the concept that many developers initially find abstract. Think of an embedding as a numeric representation of meaning. The model converts text into a list of numbers. For example (illustrative only): "Ruby on Rails"↓[0.12, -0.44, 0.91, ...] Another phrase: "Rails Framework"↓[0.13, -0.43, 0.90, ...] Even though the wording is different, the vectors end up close together because they have similar meaning.

Part 12 – Where Does Sidekiq Fit?

Another practical interview topic. Generating embeddings for thousands of documents can take time. A common approach: PDF Uploaded↓Active Job / Sidekiq↓Extract Text↓Split Chunks↓Generate Embeddings↓Store in pgvector Keep the upload request fast and process indexing asynchronously.

Part 1 – What is Prompt Engineering?

Prompt Engineering is the practice of designing prompts that consistently produce useful, accurate, and structured outputs. Think of it like writing good requirements.

What you must learn?

A senior developer isn’t expected to explain transformer mathematics or derive attention equations.