Applying for jobs on duunitori, response rate and time

I just applied for a couple of data engineering roles in and around oulu on duunitori website. I do not speak Finnish and so I applied to companies that do not require Finnish. I wanted to know if anyone here has applied on duunitori and what the response rate is like? Do the companies that reject send a rejection mail? What is the ratio like for companies applied to and the companies that actually respond?