Dear Sir,
i'm working on odoo/OpenERP from starting of my IT carrier, it was started from odoo's development centre, i worked there for 2 years as an application engineer, worked on offshore client projects, after i worked for odoo partner, on lead role, handled project onsite and also client communication, training and support etc.
now i have 6+ years of experience, it was version 4.2 when i started working on odoo, i worked on every release of odoo, and also did several migrations from one version to next version. i have done projects of different types including new module development from scratch, customisation in existing modules, data migration, integration with third party apps ( Magento , Amazon, Ebay, Shipping service, Payment Gateways etc) , customisation in report, data models, workflows etc, and having expertise on CRM, Sale, Purchase, Account, Manufacturing, HR, Project mgmt modules etc.
Related to your requirement, i have developed eBay integration module from scratch, its customised as per client specific requirements. for one client important it was implemented with ability to export product listing with variants from odoo, update stock in cron job, fetch orders to odoo. that's all. for other project they were managing listings and stock manually, but integration for import orders, raise invoice on ebay from odoo, complete on ebay from odoo. and also multi instance.
i can not attach any image here with bid, so please msg me, i'll provide imgs.