- C#, ASP.NET MVC, WEB API, WCF, Entity Framework, Nhibernate, ADO.NET, LINQ, DI (Unity, NInject, Autofac, SimpleInjector), Windows Azure, NUnit,Testing Framework, asynchronous and parallel architecture, microservices architecture, JSON, XML, SignalR;

- SQL (queries, joins, clustered and non-clustered indexing, constraints, stored procedures, triggers, transactions);

- NOSQL (redis, Mongodb, ravendb, azure table storage, amazon dynamodb, elasticsearch)

- Rabbitmq, msmq, activemq.

- CI: Teamcity, Jenkins, Jira, Redmine, Automated tests, Selenuim.

- Architecture Patterns: (Abstract Factory Pattern, Builder Pattern, Factory Method Pattern, Prototype Pattern, Singleton Pattern, Adapter Pattern, Bridge Pattern, Composite Pattern, Decorator Pattern, Facade Pattern, Flyweight Pattern, Proxy Pattern, Chain of Responsibility Pattern, Repository Pattern, Service Layer Pattern, Single Responsibility Pattern, Command Pattern, Open Session In View Pattern, MVC, SOLID, TDD, DDD and etc.);

- Amazon aws ec2, s3, rds, dynamodb, elasticache, redshift, kinesis, sns, microsoft azure, table storage, documentdb, load balancing.

- Front-end: JavaScript, JQuery, AngularJS, Bootstrap, HTML5, WebSockets