One of the first platforms for ICO and STO providing coin investors with 2% revenue and accelerating fundraising activities for startups to 3-6 months which is significantly shorter than a typical process through an IPO or venture capital. CentrumC CentrumCoin is an online ecosystem merging the conventional business world with the crypto-blockchain space and aims to make investment transparent, democratic, and more secure by removing bureaucracy for both retail and big investors. The system supports disruptive Crypto, Blockchain and Tokenizable projects. Each project should get through selection stages and attract investments for development. The challenge The idea was to develop a platform for STO and crowdfunding activities for startups. Key requirements: ERC-20 token development. KYC (know your customer). Compatibility with any type of device. The highest security and fault-tolerance. Ensuring a provided idea security by using encryption methods. What we did In case of ICO: Cryptocurrency placing. Tokens receiving. Assets withdrawal: exchange tokens to cryptocurrency. Funds transfer through the exchange. The main difficulty of the project’s business logic was the development of algorithms and rules of interaction between users who had different roles and functions. The development stages According to client’s requirements we’ve completed the following tasks: proof-of-concept; complete business analysis; project architecture development; project business logic development; user behavior scenarios development; integration with external resources scenarios development; KYC-service integration; interfaces and design for devices of any type; integration with external data sources; full functionality and interfaces implementation; deployment on working services; complete testing.