Position: Java developer
Category: Java
English level: intermediate
Years of experience: 5

Certificates:
Big Data Analysis with Scala and Spark 
Parallel programming Functional
Program Design in Scala 
Functional Programming Principles in Scala
Effective Programming in Scala
1Java developer
Company: MyLab24
April 2022 - October 2022
Developed a backend server for health care service (lab24.pl, lab24.com.ua, etc) from initial point to going to production in different countries. Developed central subsystem - creating an order (main service is taking laboratory analysis at home), database structure, REST API. 
Technology stack: Java 11, Spring Boot, MySql, Redis, JPA, Liquidbase, Swagger API. 

Android Developer
Company: LetyShops
February 2017 - June 2022
Developed an android app for cashback service letyshops.com (from initial commit to production and support and refactoring later). The app is used by 10 millions users now in different countries. App architecture based on concepts Android Clean Architecture (dividing by layers) and reactive java. Also used injection framework Dagger and NoSql database Realm.
Technology stack includes Dagger 2, Realm, Android Clean Architecture, RxJava 2, JUnit, Mockito, etc.

Junior Java Developer
Company: The First Mobile Systems
July 2016 - December 2016
Take part in developing a backend for messenger, based on microservice technology. Developed auto stress tests for microservices by Gatling (Scala) for REST and websocket endpoints. 
Technology stack: Java 8, Spring, Apache Kafka, Couchbase, Prometheus, Gatling, Scala (stress tests), REST, Websocket, JUnit, microservice architecture.

PHP Developer 
Company: Vinnytsia IT-Academy
February 2015 – June 2016
Developed backend web application for online education platform intita.com (database, CRM, models, controllers, based on Yii 1.1.16 Framework) from initial commit to production stage. 
Technology stack included PHP, framework Yii, JavaScript, Mysql)
Backend development of Java/Scala (scala junior)