Recently was offered a job but was lowballed a bit and didn't negotiate

I am a recent masters graduate who was fortunate enough to get a referral for a data science role in a large company in Canada and eventually a job offer. I have about 2 years of relevant graduate research experience and 16 months of internship experience. During my first interview, I was asked what my salary expectations were, to which I responded 80K-90K. During my most recent call with HR to communicate the offer, they offered me 85K. They also …

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