Hello sir,
we are team of 62 people expert in blockchain chain technology with C++ and solidity have developed many altcoins and ETH smart contract with ERC 20. we have developed many crypto to crypto exchange protal also.
Technologies we use : Codeignitor , Laravel,, .Net core, Angular JS , JSOn, NodeJS , AWS , Bootstrap , CSS5 ,C++ Programming , Blockchain, Nosql , MYSQL ,Sql server