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Yevhen Vlasenko
Java Developer
[open contact info ](look above in the "contact info" section) [open contact info ](look above in the "contact info" section)
Kryvyi Rih, Ukraine @vlasen_ko
LinkedIn GitHub
Profile
Java developer with hands-on experience working with the Spring ecosystem,
designing and building applications using SOLID principles and GoF patterns. I've
integrated databases (Hibernate, JDBC) and handled containerization with Docker. I
bring deep expertise in development using TDLib/Telegram Bot API. My technical
practice includes unit testing, integration testing, and documentation (JUnit,
Mockito, Swagger API). I write clean, readable, maintainable, and efficient code by
applying best practices and design patterns. My background in Scrum teams
combined with B2 English proficiency allows me to effectively navigate
documentation and collaborate in international teams.
Professional Experience
Java Developer 12/2023 – 01/2025
RTS-Ukraine
Project: NDA
Enterprise platform for real-time social media analytics, enabling large-scale data
analysis and research insights.
Used Technologies:
Java 17.
•
Spring ecosystem (MVC, Security, Data JPA, Spring Cloud Config Server).
•
TDLib, Telegram Bot Api.
•
Docker.
•
Junit5, Mockito.
•
Key achievements:
Developed and maintained Telegram API integration service from scratch
•
processing 10k+ messages daily using reactive approach and GoF patterns.
Built and optimized message processing microservice using Spring Boot and
•
TdLib.
Created reactive non-blocking Telegram client emulation with TDLib and Project
•
Reactor.
Implemented DB integration (Hibernate/JDBC).
•
Designed and developed message type conversion system supporting 5+
•
different content formats, enabling seamless data integration.
Integrated OpenAi API in reactive approach with fine-tuned models that lowers
•
usage cost by 70%.
Collaborated with senior developers to improve application architecture,
•
participated in all aspects of the process: daily stand-ups, sprint planning, and
retrospectives.
1/2
Maintained minor frontend tasks with Javascript.
•
Skills
Java — Core, Java 8/17, REST, OOP, SOLID, GoF patterns.
Spring ecosystem — Spring Core, Spring Boot, MVC, Security, Spring Data JPA, Spring
Cloud config server, Spring Cloud Bus.
DB — JDBC, Hibernate, PostgreSQL, MySQL, H2, MongoDB.
Cloud & Containerization — Spring Cloud Config server, Docker, Kafka
Tools and Libraries — Junit5, Mockito, Project Reactor, Swagger, TDLib, Telegram Bot
Api.
JavaScript — Core.
Other — Linux, Git, Maven.
Soft — B2 English, Scrum.
Education
Kryvyi Rih Technical University,
Bachelor's degree in Internal Combustion Engines Engineering
Mate academy,
Full-time Java course
2/2
Java Developer
[
Kryvyi Rih, Ukraine @vlasen_ko
LinkedIn GitHub
Profile
Java developer with hands-on experience working with the Spring ecosystem,
designing and building applications using SOLID principles and GoF patterns. I've
integrated databases (Hibernate, JDBC) and handled containerization with Docker. I
bring deep expertise in development using TDLib/Telegram Bot API. My technical
practice includes unit testing, integration testing, and documentation (JUnit,
Mockito, Swagger API). I write clean, readable, maintainable, and efficient code by
applying best practices and design patterns. My background in Scrum teams
combined with B2 English proficiency allows me to effectively navigate
documentation and collaborate in international teams.
Professional Experience
Java Developer 12/2023 – 01/2025
RTS-Ukraine
Project: NDA
Enterprise platform for real-time social media analytics, enabling large-scale data
analysis and research insights.
Used Technologies:
Java 17.
•
Spring ecosystem (MVC, Security, Data JPA, Spring Cloud Config Server).
•
TDLib, Telegram Bot Api.
•
Docker.
•
Junit5, Mockito.
•
Key achievements:
Developed and maintained Telegram API integration service from scratch
•
processing 10k+ messages daily using reactive approach and GoF patterns.
Built and optimized message processing microservice using Spring Boot and
•
TdLib.
Created reactive non-blocking Telegram client emulation with TDLib and Project
•
Reactor.
Implemented DB integration (Hibernate/JDBC).
•
Designed and developed message type conversion system supporting 5+
•
different content formats, enabling seamless data integration.
Integrated OpenAi API in reactive approach with fine-tuned models that lowers
•
usage cost by 70%.
Collaborated with senior developers to improve application architecture,
•
participated in all aspects of the process: daily stand-ups, sprint planning, and
retrospectives.
1/2
Maintained minor frontend tasks with Javascript.
•
Skills
Java — Core, Java 8/17, REST, OOP, SOLID, GoF patterns.
Spring ecosystem — Spring Core, Spring Boot, MVC, Security, Spring Data JPA, Spring
Cloud config server, Spring Cloud Bus.
DB — JDBC, Hibernate, PostgreSQL, MySQL, H2, MongoDB.
Cloud & Containerization — Spring Cloud Config server, Docker, Kafka
Tools and Libraries — Junit5, Mockito, Project Reactor, Swagger, TDLib, Telegram Bot
Api.
JavaScript — Core.
Other — Linux, Git, Maven.
Soft — B2 English, Scrum.
Education
Kryvyi Rih Technical University,
Bachelor's degree in Internal Combustion Engines Engineering
Mate academy,
Full-time Java course
2/2
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The candidate's resume is posted at https://www.work.ua/resumes/13289452/