Contact information

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Work experience

Middle Java Developer

from 09.2024 to now (1 year 6 months)
Thingsboard, Київ (IT)

Responsibilities:

- Migrated event and telemetry processing from PostgreSQL to Kafka to improve scalability and reliability.
- Enhanced the black-box testing framework by extracting it into a standalone project, adding legacy Edge version support, version selection, and TeamCity CI integration.
- Added support for CalculatedField and Secret functionality on Edge.
- Introduced telemetry reporting for Downlink/Uplink queues, enabling full synchronization observability and custom dashboards.
- Improved system modularity by refactoring clustering logic into a dedicated submodule.
- Participated in release management and successfully led the 4.2 release process.
- Resolved customer issues and contributed to overall product stability and satisfaction.

Achievements:

- Built performance tests that uncovered and helped fix Kafka event loss issues.
- Automated black-box test execution across multiple environments (Local, Demo, Cloud, CE, PE), reducing manual work and increasing CI/CD reliability.

Middle Java Developer

from 04.2023 to 08.2024 (1 year 5 months)
AFP, Київ (IT)

Responsibilities:

- Supported existing projects and generated detailed CSV reports.
- Developed an action plan to restore system stability and improve performance.
- Analyzed the system and documented its main functionality.
- Communicated directly with the customer to clarify requirements and provide updates.
- Created and maintained technical documentation.

Achievements:

- Delivered a clear and approved plan for restoring and optimizing the system.
- Implemented a convenient and automated reporting feature.
- Strengthened understanding of microservice architecture.

Senior Java Developer

from 08.2022 to 04.2023 (9 months)
NCDEV, Київ (IT)

Responsibilities:

- Analyzed project requirements and selected appropriate technologies based on the analysis.
- Designed program architecture and database schema.
- Organized and coordinated the application development process.
- Collaborated closely with frontend developers, testers, and DevOps engineers.
- Developed and delivered backend functionality within tight deadlines.

Achievements:

- Successfully implemented the system architecture on schedule.
- Structured and facilitated efficient team collaboration.
- Designed a database and created an automatic initialization process using Liquibase.
- Implemented manager authorization with JWT tokens.
-Developed REST APIs for manager operations.

Middle Java Developer

from 01.2022 to 08.2022 (8 months)
AllBridge, Київ (IT)

Responsibilities:

- Developed a project to create a bridge between different blockchains.
- Studied and applied the Web3j framework for interacting with the Ethereum blockchain in Java.
- Participated in regular team meetings to plan goals and review progress.

Achievements:

- Implemented a message broker that tracked changes in a smart contract on one blockchain and triggered messages on another.
- Presented the demo project’s functionality to the team.
- Designed and configured a multi-module Gradle project.
- Successfully delivered the project on time in collaboration with the team.

Middle Java Developer

from 07.2021 to 01.2022 (7 months)
Neonomics, Київ (IT)

Responsibilities:

- Added new functionality to the user module.
- Participated in designing the architecture of new modules.
- Collaborated daily with the international team in English.

Achievements:

- Developed asynchronous processing for user data and authentication within the system.
- Joined the architecture design team and created a structural diagram for the reporting module.
- Enhanced communication and teamwork skills through active collaboration.

Junior Java developer

from 08.2019 to 07.2021 (2 years)
Corside, Київ (Роздрібна торгівля)

Responsibilities:

- Developed the Seller’s Cabinet functionality.
- Improved the search module and enhanced search parsing logic.
- Fixed bugs and optimized existing features.

Achievements:

- Migrated data retrieval from Amazon FTP to Amazon API.
- Implemented a flexible entity search by key elements in the search string.
- Resolved configuration issues in Apache Solr, improving search stability and performance.

Student

from 09.2018 to 07.2019 (11 months)
EPAM, Київ (IT)

- Completed 5 laboratory courses: Multithreading, Java 8, Spring, Hibernate, and Testing (JUnit, Mockito).
- Developed REST API functionality for the user account module.
- Configured Spring Security integration with CloudFiles.
- Applied all acquired knowledge to build a commercial project “DogHotel” as part of a team using the SCRUM methodology.
- Improved my Java skills and deepened understanding of core algorithms, design patterns, and programming principles.

**My contribution to the “DogHotel” project:**
Developed user interface functionality and configured Spring Security for CloudFiles integration.

https://www.doghotel.com.ua/

Education

KPI

TEF, Київ
Higher, from 2021 to 2023 (2 years)

Received a master's degree

КПІ

ТЕФ, Київ
Unfinished higher, from 2015 to 2019 (4 years)

Received a bachelor's degree

Additional education and certificates

Netcracker

2018, 4 місяці

EPAM

2018, 4 місяці

Дія. Цифрова освіта

1 день
Certificate

Knowledge and skills

• Java Core
• Java 8+
• Spring
• Log4j
• ActiveMQ
• Mockito
• JUnit
• REST API
• PostgreSql
• MongoDB
• JDBC
• JPA(Hibernate)
• Gradle
• Maven
• Swagger
• Postman
• Docker
• Jira
• Jenkins
• Git
• CI/CD
• OOP
• KISS
• DRY
• YAGNI
• SOLID
• BDUF
• SQL
• Spring Boot
• IntelliJ IDEA
• Hibernate

Language proficiencies

• Ukrainian — fluent
• English — average

Additional information

I’m easy to communicate with and enjoy working with people.
Outside of work, I like playing tennis and volleyball.
I’m passionate about programming and love solving challenging problems.