I build backend systems and write about what I learn.

Hi, I'm Mert. I mostly work on backend services, databases and the infrastructure they run on.

I write mainly in Turkish; this section collects the posts I have translated into English. The full archive, short notes and projects are on the Turkish site.

Latest · September 12, 2026Choosing PostgreSQL indexes: B-tree, GIN and BRINAdding a B-tree to every slow query usually works, but not always. A look at when each of the three index types makes sense, using real query plans.

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