API/Webhook RD Station - URL double way. RD STATION EXPERIENCE

To develop an API to convert some fields into codes and to send the coded leads to a given URL. The API must be both ways this means to update the stage of the leads in RDS. A lead has the following fields: Name, Email, Telephone, Vehicle, Brand, City, Stage, and 4 more fixed fields (1,0,1,0) The URL must receive the same field but Brand and City must be coded to a numerical value. When the lead changes its stage in an external application from opportunity to customer, it will send the new stage to RDS which must be updated. I provide full access to RDS and support with the brand and city coding table. I provide the URL where to send the lead and where to get the stage to POST and GET the data. For his project, you MUST know RD Station, if not please don't apply, thanks.