I’m assuming that the author is describing his experience working as a consultant for a software company with a larger team. The article explicitly refers to multiple programmers working on the code base.

I'm guessing he's working with other people; a "team" perhaps. Consultants are, sometimes, hired to work for or with companies; even for long periods!

Author here. The blog is for my personal brand, because I often work independently, but I was employed full-time as lead architect for this venture.

He seems to do contract work with teams. The bio might be old.

We do the same in several teams of 5+ people, in a company having 3k employees.

I don't understand what lets you come to your conclusion.

From the article: "Both the Haskell and Elm code-bases are worked upon by multiple developers simultaneously."

the use of "our" threw me off a bunch, unless they're referring to clients