As a college student looking for FTE a couple of years ago, putting my SaaS on my resume definitely helped me.
Every interviewer asked me about my side projects and the tech aspect of it. The fact that it was used by 5k+ users at that time was always met with amazement and appreciation.
At my current employer, I was told that me trying things out and learning things on my own (demonstrated by me growing my SaaS) was one of the big factors in me getting hired there.
[All my interviews were at startups]
Of course once you are employed you should follow this advice