Implemented a new Java application that was implemented in React.js. I wrote this application completely from creation to release. Developed the architecture of this application and solved a complex performance problem

Stack: Java8, Spring, H2, Maven, MySQL, Bitbucket, React.js, Gson, JSON, Postman

I was part of a team in which I developed a microservice that was responsible for processing user data. Managed to optimize the work of mixorvises that were responsible for several functions related to working with internal data
Stack: Java 17, Spring Boot3, PostgreSQL, Apache Kafka, Maven, Gradle, JWT, Gson, Jackson, JSON, Postman, Junit4, Mockito, GitLab

Finished work on the mvp version, rewrote the controllers to work with rest full architecture. Optimized the performance of queries to the database using drivers for PostgreSQL and hashed the queries to the database
Stack: Java 8 , Spring, PostgreSQL, Maven, JWT, Jackson, JSON, Postman, Junit4, Mockito