Hopefully someone can provide more info, but apparently there are some bacteria in geothermal vents near Baja California that seem to be able to handle venus-like conditions. No idea what the details are though
Interesting, wikipedia says these microbes are called thermophiles, and that they can survive for up to 122 degrees celcius. That is still less than what they have on Venus, that is 464 degress. https://en.wikipedia.org/wiki/Thermophile