The main Job easy to get for Bitcoin is the Signatures campaigns in this forum, I don't have to describe how this work because you are already in one campaign, so, should be clear for all how it works.
Another Job that you can get for Bitcoin is Web development or APPs development, you can offer those services in the "Services" section of the forum, I have sold this kind of service to 2 users, and both of them were happy with my job.
And another job that you can get for cryptos is to work for a crypto site like casinos or exchanges... those options pay to their employees in BTC.
This is one of my go to options and also trying to learn more skills. Well, nowadays it's relatively easy to learn computer related skills if you just dive deeper into the internet. There are even short courses offered online and one google click, Alas! There's the courses you can choose from out of many.
I've noticed too that most job offers online are more on tech related stuffs. This is one thing I've noticed after visiting several job hiring communities online due to my friend asking for help, and yes some of them also offers to pay bitcoin but mostly they're either paying via e-wallets/fiats/banks and Paypal.
I'm also curious about jobs offered on crypto sites like casinos or exchanges as you've said coz mostly what they're hiring are more on technical side. I have seen even etherscan is hiring for web developers, content strategists and customer support specialists.
One thing I've proven in this thread is that, there are so many crypto related jobs that're reliable compared back then. Well, it's a no brainer knowing that the crypto industry is improving and moving forward, that's why there're so many opportunities online regarding crypto.