Jobs in general will give you positive points, sure. I think it's good to show that you know how to work a "real job" because it shows a person with breadth. Maybe a science related job will be marginally better than, say, McDonalds. But even if it's like 1% positive points or whatever, it's not like this job (or any job) would clearly be enough to put your application over another student's, since it would be one part in an unscientific measurement. Unless there is a super unlikely scenario where there are 2 applications that are exactly the same except one has this job. But since a scenario is not a realistic way to think about grad school applications.
In short, the positive aspects of this job are the money that you will earn and the exposure to scientific writing. These indirect benefits could help you do well in your masters and help you write a stronger PhD applications. But the effect of just having it on your CV is probably negligible, not really better than any other job, which most people would have anyways. (In my opinion!)