Content Writing for an International Audience for an online portal included SEO optimised content

We are looking for an individual who can help us with the copy writing for an online portal. The core business of this online portal is the sourcing and selling of food additives, ingredients and flavors (a.k.a. food and beverage raw materials) and processing, filling and packaging of goods for the food and beverage industry. The ideal candidate must have the wit of a B2C writer with the skill for writing editorial content for a global audience (so we need to use clean English which is clearly understood universally, no idioms). The website content needs to be minimal, just enough to explain what needs to be explained. We need someone who can spend the time picking the right language for our website and style of writing, which is to 'educate' our user in wanting to interact digitally with the portal. The style of language used is like when talking to a friend. The content will also need to include certain important keywords for SEO which we will define together. The amount of content required is variable at this stage and we would like to have an indicative quote for the following: PRODUCT CATEGORIES Around 15 categories and for each we would need a paragraph of text of around 150 words to include within the web page and also an optimised meta description of around 25 - 30 words. PAGES CONTENT Around 10 pages in all, and each page would have roughly 400 words in it. We will explain briefly what is the gist of the content of each page and then we expect the candidate to expand on it using professional and easy to understand English. The amount of content required is indicative at this stage. We would like you to let us know your hourly rate, and the amount of hours you would require for the above content. The exact content will be then defined once project is assigned. We would also like you to provide us with a sample of your work which you feel is in line with our requirements.