Functionizer will be an open source platform dedicated to application developers. We respond to key challenges of the cloud domain today. IoT, scientific research, and other generate great amount of data at a speed impossible to handle. Companies try to leverage resources of cloud providers to their specific needs. Combined with serverless architecture, this approach will let applications scale automatically to even thousands of simultaneously running functions. Functionizer will support migration to serverless model and optimisation of underlying multi-cloud resources.