Vlad Chain Email and Phone Number

1. Implemented a service for the banking system under the loyalty program and bonuses to improve the customer experience. As a result, an MVP was created and deployed on the prod.(Java, Maven, Spring Boot(WebFlux, Data, Security), Microservices, PostgreSQL, MongoDB, GitLab, Kafka, Swagger, JUnit, silf4j).2. I covered the existing code of one of the banking system services with modular and integration tests and added loggers. As a result, critical bugs that affected the latency of the service were identified and eliminated.(Java, Maven, Spring Boot, Microservices, PostgreSQL, GitLab, JUnit, slf4j, OpenShift, Postman).3. Optimized and tested database queries in one of the banking system services. The result is that the data acquisition rate has increased by 1.5 times.(Java, Spring Boot, PostgreSQL, Microservices, GitLab, JUnit, Maven).

1. Developed backend web applications for operational analytics of transport, designed RESTfull API and covered the code with tests. The result is a successful first release of the project and a 20% reduction in fuel costs. (Java / Kotlin, Spring Boot, RESTfull, PostgreSQL, Hibernate, JPA, Junit, Gradle, Swagger, Docker, GitLab, slf4j, Flyway).2. Developed backend Android applications for the company's transport in the fuel direction, designed a microservice architecture, used TDD technology, implemented services for selecting recommended gas stations along the logistics route. As a result, the successful release of the project and reduction of fuel costs and gas station search time. (Java / Kotlin, Spring Boot, PostgreSQL, Microservices, Hibernate, JPA, Postman, Junit, Gradle, Swagger, Docker, GitLab, Kafka, OpenShift, SonarQube, slf4j, Flyway).3. Developed backend Android applications for the company's transport in the fuel direction, designed microservice architecture, used TDD technology, implemented services for the use of virtual corporate cards. As a result, the successful release of the project and reductionof fuel costs. (Java / Kotlin, Spring Boot, PostgreSQL, Microservices, Hibernate, JPA, Postman, Junit, Gradle,Swagger, Docker, GitLab, Kafka, OpenShift, SonarQube, slf4j, Flyway).4. Optimized the backend of the application for empty flights in the transport company. As a result, the API response time decreased by 2 times. (Kotlin, Postman,OpenShift, Microservices).5. Performed refactoring of numerous microservices from Scala to Kotlin. (Kotlin, Spring Boot, PostgreSQL, Microservices, Hibernate, JPA, Postman, Junit, Gradle, Swagger, Docker, GitLab, Kafka, OpenShift, SonarQube, slf4j, Flyway).

Java Core, IntelliJ, Maven, Junit, log4j2, Lombok, Stream API, Jsoup, JSON, GSON, Jackson, GitLab, GitHub, MySQL, JDBC, JPA, Hibernate, Spring Boot, VisualVM, Postman, Swing, Redis, MongoDB, Docker, MySQL, Workbench.1. Developed services for parsing websites https://lenta.ru , https://www.moscowmap.ru , https://skillbox.ru and saving data to the database. (Java, Maven, JSON, Jsoup, GSON, Jackson).2. Developed a desktop application for collecting personal data. (Java, Maven, Swing, MySQL).3. Developed backend and partially frontend of "To do list" and "Book library" applications. (Java, Maven, SpringBoot, Postman, JPA, Thymeleaf, MySQL, Hibernate, JPA, Tomcat, HTML, JavaScript).4. Developed a service for parsing an xml file with a list of voters and an xml file of an educational institution, received the necessary data and uploaded it to the database. (Java, Maven, SAXPapser, MySQL, JPA, Hibernate, log4j, Lombok).5. Developed the application "Search Engine". (Java, Maven, SpringBoot, Postman, MySQL, Apache Solr, Jsoup, Liquibase, JPA, Hibernate, slf4j).

Maintaining the technological regime