Languages: RoR, Scala, Node.js, Java, Solidity, C, C#, Python, PHP, and Swift
Blockchain - Ethereum, NEO, Bitcoin, Exchanges, and Wallets
Big Data - DataStax, Apache Spark
Mobile Applications - Native iOS and Android Development
Security - HIPAA and PCI
VoIP/SMS - SIP, RTP, and Twilio
STO - KYC\AML
RDBMS- Oracle, SQL Server, IBM DB2, MySQL, Postgres