TechWallet is an ASP.NET MVC Core application, written in C# and currently running on a Windows server.
The Monero wallets themselves are managed by instances of Monero's monero-wallet-rpc binary. RPC calls go through Agorist-Action's csharp-monero-rpc-client library, arguably the best one for C# at the moment. For some sort of load-balancing there are 3 technet and 3 testnet RPC binaries running on their own server.
Some info about transactions like rings is not easily obtainable through wallet or daemon RPC calls. To get at them nevertheless additionally two private instances of the Onion Monero Blockchain Explorer are queried by the server app.
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