Topic: Use Bitcoind as a service (Read 108 times)

I am a newbies as Bitcoin developer, Need help in following mention queries.

We are doing a project on Bitcoin services like on-line available crypto currency wallets, we have to do following operations, currently it is in R&D process.

By proving a platform, where users can register and create their wallets and perform all bitcoin services like on-line available crypto currency wallets.

Like on behalf of registered users we create their wallets, addresses along with support of multi sign addresses. And facilitate them to make and sign transactions from their wallets.

For this purpose we are using Bitcoin RPC Services and we achieve almost all of our our targets but we are facing some following issues.

Issues:
our understanding, we initiate a single instance of Bitcoind for all users, and make all user operations possible on their individual account, but if any one user perform lock wallet operation on its wallet it locks all user accounts for transaction operations.
On same instance we are unable to get updated balance after make some transaction, on multi sign address, in testnet environment. If we verify on other services lick Block Cypher it reflects over there.

Questions:
can we set multiple wallets on single bitcoind instance.

Need assistance on each issue or any issue.

Please guide me on this or provide any alternative available, or what is the best practice for this type of issue.

Thanks,