This is the first time I've been on a project with a developer that is incredibly slow. Almost an entire month has passed, and this particular developer is still working on a story. In fact, it's the only story the devs picked up.

I work for a consulting organisation, and this particular developer and I are the only ones engaged on this project.

I am also the senior developer. I have tried numerous times to help speed things up by suggesting if there are blockers to hit me up so we can get it resolved.

At this point, I'm not entirely sure what to do. Should I report this back to the company I work for, or should I shut my mouth and say nothing because it isn't my problem?