Computer programming; software as a service (SAAS) featuring software for managing and verifying cryptocurrency transactions on a blockchain; Platform as a service featuring computer software platforms for providing digital contents for electronic commerce and finance based on blockchain technology for use in the fields of virtual currency, cryptocurrency, and blockchain technology; Constructing internet platforms for electronic commerce, namely, designing, creating, maintaining and hosting online retail and electronic commerce websites for others; Computer software development; development of software relating to virtual currency and cryptocurrency; Development of computer platforms; designing, creating, maintaining and hosting of websites; Designing, creating, maintaining and hosting of mobile computer software applications; development of software for electronic commerce based on blockchain technology; Computer system design for use in the field of to finance based on blockchain technology; Technological consultation in the technology field of computer software and hardware for virtual currency, cryptocurrency, and blockchain technology