I worked for a customs-logistics company and did some integrations with european cargo firms. EDI is definitely something a senior developer can figure out and parse/generate. Wiring your system through api/sftp servers won't be that hard.

The main problem will be the UI. Use existing frameworks! Telerik, devex, anything you can get your hands on. Don't let your project become hindered by someone's half-ass attempt at reinventing a data source and pivot grid. It already exists and it is a solved problem.