Євгеній

Yevhen Vlasenko
Java Developer
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Kryvyi Rih, Ukraine @vlasen_ko

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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. 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 my proficiency in
B2 English, allows me to navigate documentation effectively and collaborate with
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.
Collaborated with senior developers to improve application architecture,
•

participated in all aspects of the process: daily stand-ups, sprint planning, and
retrospectives.

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Java Developer 06/2025 – Present | Remote
Testomat.io
Developed from scratch an event-driven test reporting library for centralizing
automated testing results. The library is published on Maven Central and used by
QA teams to integrate JUnit 5, TestNG 7, and Cucumber 7 tests with the test
management platform.
The project is based on a multi-module Maven architecture with a core and
framework-specific modules. Implemented automatic integration via SPI, AspectJ-
based AOP tracking, AWS S3 for artifact storage, and a thread-safe HTTP client for
real-time result synchronization via REST API requests.
Used Technologies:
•Event-driven architecture.
•Java 11+, Maven 3.x (target compatibility)
•JUnit/TestNG/Cucumber extensions with SPI
•AWS SDK v2
•JavaParser
Key achievements:
•Designed and implemented an event-driven multi-module Maven architecture
(core + framework-specific modules) with clear separation of concerns.
•Developed an AOP/reflection-based system for automatic test step capture and
reporting with support for parameterized placeholders.
•Published to Maven Central (Sonatype OSSRH) with complete documentation,
semantic versioning, and backward compatibility.
•Integrated AWS SDK v2 (S3 Client) for asynchronous artifact uploads
(screenshots, logs, videos) with public/private URL generation.
•Developed a shared test runs system for team collaboration with support for
multi-threaded parallel test execution.
•Implemented a JavaParser-based static code analyzer for automatic test ID
synchronization between the codebase and the test management platform.
•Automatic test framework detection through Service Provider Interface (SPI)
and extension auto-detection mechanisms.
•Created a flexible configuration system supporting multiple sources (properties
files, JVM arguments, environment variables) with priority handling.
•Implemented parametrized tests support with automatic parameter extraction.

Skills
Java — Core, Java 8/17, REST, OOP, SOLID, GRASP, GoF patterns, AOP.
Spring ecosystem — Spring Core, Spring Boot, MVC, Security, Spring Data JPA, Spring
Cloud config server, Spring Cloud Bus.
DB — JDBC, RDBMS, Hibernate, PostgreSQL, MySQL, H2, MongoDB.
Cloud & Containerization — Spring Cloud Config server, Docker, Google Jib, Kafka.
Tools and Libraries — JUnit5/TestNG/Cucumber with custom extensions, Mockito,
Project Reactor, Swagger, TDLib, Telegram Bot Api.
Other — Linux, Git, Maven.
Ruby/JavaScript — Core.
Soft — B2 English, Scrum.

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