Konstantin

Kostiantyn Andrushchenko Ukraine, Kharkiv
[open contact info](look above in the "contact info" section)
Java/Kotlin developer / Software engineer (Phone/Telegram/Viber/
Whatsapp)
Summary: [open contact info](look above in the "contact info" section)
• Back-end developer [open contact info](look above in the "contact info" section)
• have experience in development commercial gaming platforms Telegram: @pantheros
• have an understanding of event-driven models
• have experience in multithreading / concurrency
• familiar with Docker and Linux

EXPERIENCE MAIN SKILLS
DigitalHouse LLC, Luhansk– Java developer Java 7, 8, 11+, 17, 21
jun, 2008 – aug, 2015 Stream API, Multithreading,
PragmaticPlay, Kyiv – Java developer Collections, Spring Core,
aug, 2015 – jul, 2020 Spring Boot, MVC, Data,
iTransition, Minsk – Java developer Cloud, etc. Netty, Apache
dec, 2020 – apr, 2022 MINA, gRPC, JDBC, JPA,
SupportYourApp, Kyiv – Java developer ORM, Hibernate,
may, 2022 – oct, 2022 RabbitMQ, Kafka
Self-employed/freelance (jan 2023 – jun 2024) Servlets, JSP, JSTL, Struts
Mindy Teams, Kyiv – AI/ML data analyst Unit test frameworks:
jun 2025 – present Junit, Mockito
Imperia Holding, Lviv – AI data annotator Frontend:
oct 2025 – present
HTML, CSS, XML,
EDUCATION JSON, Javascript, JQuery
Volodymyr Dahl East Ukrainian National University, Databases:
Luhansk. Bachelor degree, 2006 – 2010 MySQL, Postgres, Oracle
Economic cybernetics. Automated computer integrated information MongoDB, Redis, Liquibase
management systems and technologies Software engineer Version control:
PROJECTS SVN, Git
• RESTful microservices with several purposes: Gateway API, Game Build tools:
servers, DB access services, facade services to external systems Ant, Maven, Gradle
• Web admin applications for system configuration and financial App servers:
reports building Resin, Tomcat
• Socket / websocket chat servers which provide communication Other:
between game clients and support service
Docker, K8s
• Communicator applications to external mailing services Consul discovery service
• Custom clustering of stand-alone chat servers Jmeter, Postman, Swagger
• IP telephony services based on Asterisk Regular expressions
• Applications for parsing and processing files with custom format JConsole, VisualVM
Bugzilla, Jira, Confluence
All the projects were long term.
Familiar with CI/CD
Jenkins
Participated in: Windows, Linux user
• Development; solutions designing Python scripting (support
• Refactoring of applications; legacy functionality support or hotfixing level)
• Bug fixing, Unit tests writing LANGUAGES
• Tasks planning Українська (native)
• Worked in small teams (3-5 persons; Scrum / Agile processes) English (Up.-Intermediate/B2)
Русский (native)