In some cases, it could be better to operate as a sole proprietor in Dubai (up to 375k AED is tax-free) and supplement that with employment income, e.g., from an Estonian company, or operate as an unincorporated partnership under a small business relief (up to 3M AED tax free).
This is because in UAE directors fee payment or benefit must align with the fair market value of︀ the service, benefit, or contribution offered by the connected person. Otherwise, there is a tax︁ risk if you pay way above the market rates. Market Value is determined by considering︂ the amount that would have been paid to any third party for providing the same︃ service received in similar circumstances. Management Remuneration can be supported by market surveys of compensation︄ by leading Human resources consulting firms or other manpower websites.