https://blog.step.com/2016/04/08/an-open-source-project-for-tech-salaries/ Salary is not far from mine being Senior. Are really Google's t5 and Facebooks e5 the matching levels for msft 63-64 and Amazon's sde3? If so, are people in msft and amazon getting massively screwed? If not, what is the real level match?
This is 18+ months old article.
They have an updated version in the main site blogs.step.com I found the updated article have some errors (typos) in the Microsoft section so I linked to this one.