Sorry to hear that you are facing issues with upload timeouts. To help us understand the problem can you tell us whether you are using an on-prem sharefile storage center. Also if you can tell us the rate of uploads expected from your application.
We do some throttling, but that would usually show up as a 429 (Too Many Requests) response rather than timeouts. If you're not getting any response, can you check how long your timeout is? It would also help if you could share your account id or subdomain either here or privately.