Backend development
Algorithms and data structures
GOF Patterns, ACID, OOP, SOLID

Java Core
Java SE: java.net, JDBC, Servlet API

Spring framework: Spring Boot, Spring Data, Spring Web, Spring Core, Spring Security, Spring Quartz, REST template

ORM: Spring JPA, Hibernate

Testing: JUnit, TestNG, Mockito, Cucumber

Had experience with GCP and EDA (event-driven architecture) Maven/Graddle

REST, Swagger

MySQL, Cassandra, OracleDB, MongoDB

Flyway

GitHub

Docker

JMS: Kafka, RabbitMQ

HTML/CSS