There are many job sites in the USA and I have made a list of top job sites :

1. LinkedIn
2. Craigslist
3. Vacancyopen
4. Gradsiren
5.  DreamHire.io
6.  ITS JUNGLE
7. LogoMyface
8. Glassdoor
9. Upwork
10.  Monster
11. indeed
12. Freelancer
13.  Jobrapido
14.  CarrerBuilder
15. SimplyHired
16. Desta
17. Optnation
18. Zip Recruiter
19. CareerBuilder
20. ITJobsList
21. Dice

I recommend to ITJobsList / CareerBuilder free top job/recruitment portal in the US. ITJobsList is a free job portal for job posting, resume search. it also free for job seekers to find the best high paying jobs in the US.