OpenCart Shipping Configuration

We are looking for an experienced OpenCart developer to configure our the shipping section of our e-commerce. We need to provide our customers with the following shipping methods and pricing: a) Regular mail: price based on delivery country and total weight of consignment in kilos (for example: 0.4, 1.3, 10...) b) Registered mail: price based on delivery country and total weight of consignment in kilos (for example: 0.4, 1.3, 10...) c) Parcel service: price based on delivery country and total weight of consignment in kilos (for example: 0.4, 1.3, 10...) d) Parcel service express: price based on delivery country and total weight of consignment in kilos (for example: 0.4, 1.3, 10...) Other additional options may follow (as a side project). Previous experience in Open Cart is required. We will very much appreciate to see some of your previous work.