Web
Angular, AngularJS, ReactJS, ExtJS, HTML/CSS, JavaScript, jQuery, Bootstrap, Responsive Design, PWA
Mobile
iOS (Swift, ObjectiveC), Android, Hybrid, PWA, Disconnected Apps, Kotlin
Desktop
.Net, Embarcadero Delphi, PWA
Data
MS SQL (SSAS, SSRS, SSIS), MySQL, Oracle, Amazon RDS (DynamoDB, Aurora, ...), PostgreSQL, H2, SQLite, Firebird, MongoDB, Cassandra, QLDB
Architecture
Serverless, Microservices, Distributed Systems, Disconnected Apps, RESTful API, Blockchain
Cloud
Amazon Web Services, Microsoft Azure, Google (selected services), Serverless
DevOps
AWS (VPC, EC2, RDS, DynamoDB, Lambda, etc.), Zabbix, Windows and Linux, CI/CD (TeamCity, Github, etc.)
Backend
ASP.NET, .NET Core, Spring, Tapestry, Struts, RESTful API
Languages
C#, SQL, Java, JavaScript, Kotlin, iOS (Swift, ObjectiveC), Perl, Delphi, TypeScript, ColdFusion, ActionScript
Tools
Visual Studio, RedGate, Postman, BlazeMeter, JMeter, Jira, Slack, Eclipse, Redmine
QA/Testing
BlazeMeter, Selenium, WebDriver, Practitest, Test.io, Swagger, JMeter, Postman