Article writing about coding, tracing and marking products

We are carrying a new project for which we need some English writers or journalists. Only those profiles who are native from US, CA, UK, IR, AU, and NZ will be considered. Below I provide more detailed information. This is a project about coding, tracing and marking products. The collaboration would consist of writing between 5-8 articles each month of around 500 - 700 word length. Besides, it is also possible that we ask you to write an eBook each month of 2.500 word length, but this still needs to be confirmed. We would give you a keyword and, as a writer, you would write an entire article keeping in mind this keyword as a core topic. The content of the articles is technical and specialized, it must maintain journalistic rigor and respect the structure of introduction, development, and conclusions, always following a connecting thread. We would send your test to the client so they validate it at the beginning of the collaboration. The test is going to be remunerated and we would provide you with more information in case you are interested in the project. The rates for the articles are negotiable. If you are interested, I would need to know: (1) Which country are you native from? (2) Which would be your rates for writing articles of 500-700 words?