The first responses will be the Freelancer.com, fiver, and upwork.com. This sites are paying very low and for a job, which is impossible to do it or illegal, for an example:
We are looking for apple apps developer to update our app with the new apple guide lines, apple remove it from apps store when we fail to update it time.
If you can not download the original copy from apple developer dashboard, you may have to convert android copy to IOS app.
Now, go and do the bid battle to decompile the Android and make an iOS app, well ... :)
I was asked to sign an NDA and only than it will be delivered the details. I tought I have found a serious client. The detail it was: download an Android app, decompile it, change the logo and recompile it, well, I didn't and I don't want to do it such things.
The second anwers it will be: toptal.com and they alternatives. The toptal has the marketing text "we have the top 3%" , yeas agree, on some cases... And I can build a test system, which will adjust the dificulty and the time to bypass only the 3%. Simple. That is completly different thing when and how much time it is used those algorithms, when I need to write code.
The third are the job sites and Linked in. They are full with HR, who are lookig for people, who want to be employed: "full time" or "permanent" as how it says in UK. And is USA: "anywhere in USA", but I live in EU and I have my own company, I do accounting and I don't want employment.
The fourth type is the outsourcing. They are loking for teams the huge companies, corporates, there is no "build me a software with specifications like this:" -at least I don't know where should I find it, but other companies make a living and many times just 1 developer is assigned for the project.
The word of mounth: I have asked my friends and my fiends "friends" if we name it. One problem could be, if you live in a country, where 1 windows license (of 100 euro ) it is enough for the whole street, they proably are't interested in my "custom software developement" for thousands of euro! While compared to a local job the costs of producing the same amount of work it would be then thousands.
At UK jobs is very opular to work with recruiters and the "employer" gets thousands of candidates ( but is paying daily 500-700 euro) At USA almost the same, but is writen "Anywhere in USA" and they don't care if I am telling I don't need emplyment, nhence neither VISA, and Ican work with they timezone.
So simply I can't find a single company, were the software is needed and they have 10k-50k euro budget and nobody want to be my boss with any price. I run out from ideas, that's why I am asking help as ideas.