Milan Pantelić

Software engineer writing about code, systems and the things in between.

Topics

Notes on designing, building and maintaining software: architecture, TypeScript, tooling, testing and the craft around them.

Building products on top of language models: evals, retrieval, prompt design, latency and cost in production.

Data modelling, normalization, indexing and query performance, with a focus on relational databases such as Postgres.

How this blog works, and a tour of the building blocks every post can use.

Build a small eval harness before you touch the prompt.

Why most RAG failures are retrieval failures.

Start from the query plan, not from the columns.