Clients searching, commission based job

We're an agency that works in design area, and we're looking to add someone to our team on long-term basis who can write commercial proposals and spreading them on different platforms with direct searching for the potential clients. You have to be fluent in English with minimum 2 years of experience in marketing or management area and preferably located in Europe. Time requirements - 15 hours per week minimum. This is a remote job and your income will depends on amount of engaged clients and projects budgets. Payments only after completing the project. We appreciate initiative and fresh thinking and want to work with a person who will share our vision and become a part of our team.