I see you've defended the salary range elsewhere in this conversation, but I second the feeling that it's low. My rule of thumb is that if an ad/recruiter says "competitive salary" it probably isn't, and it worked out here also.

I'll take your word for it that in Dublin it's a fair salary---but if you have a small hiring pool and do nothing to stand out, you shouldn't complain that SO Careers gives you few leads.

Also I wonder about your expectations. You call this a good salary "for a developer at the beginning of his career." But you are looking for C#, Angular, Python, R, Matlab, Mongo, and Hadoop. Yikes! Maybe you should cut it back to just C#, put "Junior Developer" in the title, and say you'll provide training time+budget for the other techs. Or leave the requirements and offer a range that is good for someone with 5-10 years experience.

Sorry to be so critical. Best of luck to you. . . .