José is an enormous asset to the community and has an influence on many of the marquee projects, but it definitely isn't single-handedly done. He cares about the ecosystem and is very generous with his time and attention.
Anecdotally speaking, he hasn't been hands on with Oban[1], yet he still offers advice and guidance around the project because it is in the Elixir community.
Just sharing the link to your repo is a shameless plug. It would have been better had you shared a snippet of guidance/conversation in either github issue or elixirforum.
But I agree Jose is always helpful and the strongest pillar in the community.
Anecdotally speaking, he hasn't been hands on with Oban[1], yet he still offers advice and guidance around the project because it is in the Elixir community.
1: https://github.com/sorentwo/oban