Thanks for your comments. I do agree that the second job ad don’t seem too exaggerated compared to the first. However to be realistic, what is the chance that someone with a bachelors degree in a quantitative discipline with 2 years of experience is going to have all the skills mentioned. I think the key point here is that some of the requirements mentioned can discourage potentially very strong candidates from applying. I would focus on listing a few essential skills, then emphasize that the candidate be a lifelong learner who will be willing to learn new skills on demand.