Methodologies, standards
Agile, Scrum, ITIL, PMBoK
OS
Unix/Linux based, MS Windows family, Mac OS, iOS, Android, Embedded
Cloud
Google Cloud, Amazon Web Services, Oracle Cloud, Digital Ocean
Languages
JavaScript, C#, Go, Python, PHP, Swift, Kotlin, Java, HTML, CSS, C/C++, Pascal/Delphi, XML
Frontend Frameworks
Vue.JS, React.JS, Next.JS, Angular.JS, jQuery, Bootstrap, Backbone, SwiftUI
Backend Frameworks
Node.JS, Django, Symfony, Yii, Laravel
Servers
Ngnix, Apache, Apache Tomcat, Apache Traffic Server
Databases
Oracle, MS SQL, PostgreSQL, MySQL, MongoDB, Informix, Pervasive SQL, Btrieve
Services
Rabbit MQ, Kafka, Redis, Elastic Search, Sphinx, Kibana, GrayLog
*Deep knowledge of various systems: Billing systems, OSS/BSS solutions, MSC, SMSC, PPS, VMS, PSTN,
Servers, IPTV/OTT solutions, DRM.