Java, Kotlin, C#, Kafka, PostgreSQL, Camunda, СМЭВ, SSO, Elasticsearch, Swagger, Git, Hibernate, JPA, Microsoft SQL Server, JobRunr, Maven, REST, XML, JSON, YAML, Spring Framework (Core, Boot, Data, Cloud), SOAP, gRPC, Java RMI, GraphQL, OAuth2, JWT, Mutual TLS, OWASP API Security, Apache ActiveMQ