Google vs Facebook vs Microsoft - Compare career levels across companies with Levels.fyi

Google: L3 / SWE II. L4 / SWE III. L5 / Senior SWE. L6 / Staff SWE. L7 / Senior Staff SWE. L8 / Principal Engineer. L9 / Distinguished Engineer. L10 / Google Fellow. Facebook: E3. E4. E5. E6. E7. E8. E9. Microsoft: SDE / 59. 60. SDE II / 61. 62. Senior SDE / 63. 64. Principal SDE / 65. 66. 67. Partner / 68. 69. 70 / Distinguished Engineer. 80 / Technical Fellow.