the answer is you're not underpaid and shouldn't feel bad about your salary, but you could make more if you negotiate w/ leverage or take a risk on independent

the answer is you're not underpaid and shouldn't feel bad about your salary, but you could make more if you negotiate w/ leverage or take a risk on independent contracting @ a high hourly rate. above 100k is when negotiating skills and business skill start surpassing technical skills as more important for marginal gains in salary.