found, founded

Found or found is the past tense ( yesterday, or some time ago ) of "find", meaning to recover something that was lost,  to come upon by chance, or to attain something sought--
He lost his keys, but he found them after a few minutes.
We found a great place to get a pizza.
He found a sense of belonging when he changed jobs.

Founded or founded is the past tense ( yesterday, or some time ago ) of "found", meaning to establish, or to build a base or a ground for something--
This country was founded in 1776.
They founded a new charity, one that will help the homeless.

Now that you know that, you can say--
"He founded a tech startup, then found his new partners on an employment web site."