Working with a developer from another company, nominally called Jo. I had a programming session with Jo today.

Sometimes it's hard to succinctly describe an individual developers level of aptitude in highly technical fields to outsiders because it often requires a lot of context relating to the problem being solved and their attempts to solve it.

In this case I think it could be pretty accurately summarised in this little anecdote: there was a 10 second pause in our work today while Jo was trying to figure out how to type '<'