constructing an internet platform for electronic commerce; development of computer software relating to blockchain electronic tokens and cryptocurrency; user authentication services using blockchain technology; development of platforms based on blockchain; maintenance of software used in the field of e-commerce; providing of software for electronic processing of payments and money transfer; providing of software for virtual money brokerage; platform as a Service; software as a service; software development, programming and implementation; maintenance and repair of software; maintenance of web sites for electronic commerce; planning, design, development and maintenance of on-line web sites for third parties; providing access to Internet platforms for online contents