Sure, Julia doesn't have an industry-tested QR code maker (though if you google you will find some options).
But it's worth noting that CSV.jl is a file that was entirely re-written in the past 6 months and has probably the fastest performance of any CSV parser currently used. It was written using pure julia and takes advantage of tons of Base-julia features as well as multi-purpose packages.
Julia's design makes it incredible easy to write the kinds of tools you want in a flexible way.