Build custom app for Bigcommerce to work with recurly

for ecommerce subscription business [login to view URL] , need to build bigcommerce backend engine to work with recurly app following are the requirements, features: 1. Order sequencing feature. The “Order sequencing” feature is the specific functionality required for our subscription business model. When the customer orders a subscription product from our store (first-order), the product in that order should have the product SKU for example (“msbox1"). And then next month when the recurring order will be created for that specific customer automatically on BigCommerce by “Recurly” (subscription app), it should have SKU “msbox2". And when the third recurring order will be created it should have SKU “msbox3” and this sequence should follow until box 30. (SKU “msbox30"). 2. Specific Charge Date By default “Recurly” doesn’t have this feature, to set up a specific charge date (for example every 7th day of the month). So we also need the option to set up a specific charge date. The date when “Recurly” charges the customer by default is the date when the customer ordered the first order. For example, if the customer purchased his first box 15th of April, the next recurring order and charge will be created by the 15th of June. 3. “Cut-off” date feature: Let’s say we set our charge date every 7th day of the month. But if the customer will purchase his first order on the 6th day of the month the next day he would be charged for the second box (recurring order) which is wrong. So that’s why we need to have a “cut-off” date feature. For example, we will set the cut-off date for the 23rd day of the month so if the customer will purchase his first order on the 24th of April, the next recurring order for this customer will be created on June 7th. (will skip May 7th). If the customer will order his first order on the 22nd of April, the next recurring order will be created by the 7th of May. Waiting for your offers in terms of pricing and timeframe.