That's like a new grad engineer at twitter if we simply compare base salary.
To be honest, given how Facebook works, all the work he does in React/Redux is probably hindering him in terms of getting promotions.
When I was a new grad 8 years ago, my base salary was $120k already.
Unless he got a special deal, for an IC, the stock is proportional to the base salary. If your base salary is low, your stock will also be low.
That's like a new grad engineer at twitter if we simply compare base salary.