FANG 401k plans all support the Mega Backdoor Roth IRA. Which every single elgible employee should be maxing out.

The pre-tax 401k limit is ~$23,000. But you can put in another ~$46,000 post-tax. (Limits go up a little each year). High end 401k plans allow this post-tax contribution to be instantly auto-converted into a Roth IRA that grows tax free.

It's maybe a little hard to max out at L3. But every L4+ SWE should be maxing it out. Do this for 10 years and you'll actually have tucked away $700,000 plus growth. Assuming you're a couple of decades away from retirement this will compound and grow into millions of dollars for retirement.

https://www.nerdwallet.com/article/investing/mega-backdoor-r...

It's "Mega Backdoor Roth" -- no "IRA." It's in your 401k, not an IRA plan. This is wholly distinct from the "backdoor Roth IRA" contributions which also have backdoor and Roth in the name.