Some are more active then others. Web3.career and Crypto Jobs List are the most active, so I placed them at the top.

https://web3.career/

https://cryptojobslist.com/

https://cryptocurrencyjobs.co/

https://jobs.hashed.com/jobs?remoteOnly=true

https://beincrypto.com/jobs/

https://cryptojobster.com/

https://remote3.co/

https://incosmos.work/

https://myweb3jobs.com/

https://remotive.com/

https://wellfound.com/jobs

https://remoteok.com/remote-web3-jobs

https://jobs.theblockchainassociation.org/jobs

https://crypto.jobs/

https://portfoliojobs.jumpcrypto.com/jobs

https://www.paradigm.xyz/opportunities

https://app.usebraintrust.com/jobs/

https://www.useweb3.xyz/jobs

https://cryptojobs.world/

Jobs at Trail of Bits OpenZeppelin

https://hacken.peopleforce.io/careers

https://github.com/Cyfrin/OpenPositions

https://dedaub.com/careers

https://www.quillaudits.com/careers

https://www.hashlock.com.au/careers

https://www.certik.com/company/careers

https://consensys.io/open-roles?discipline=32525

https://www.flashbots.net/jobs