Сергій

Java developer

Considering positions:
Java developer, C# developer, Web developer
Employment type:
full-time, part-time
Age:
22 years
City:
Vinnytsia

Contact information

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Work experience

Career break

from 06.2025 to 12.2025 (7 months)
Working on a personal project

C# Developer

from 10.2023 to 05.2025 (1 year 8 months)
Unreal RP, Дистанційно (IT)

Developed gameplay mechanics for a multiplayer project with a client–server architecture using C#, JavaScript, and GTANetworkApi;

Implemented administrative and management functionality for player operations, reducing moderator workload, lowering resource usage, and improving quality control;

Worked with MariaDB via Linq2DB, debugging queries and optimizing server–database interactions;

Identified and fixed issues on both server and client sides, improving gameplay stability;

Participated in developing in-game UI components using JavaScript, Svelte, and CEF.

Career break

from 03.2022 to 09.2023 (1 year 7 months)
Working on a personal project

Trainee Java Developer

from 11.2021 to 02.2022 (4 months)
Спільна справа, аутсорсингова компанія, Вінниця (IT)

Developed and maintained software using Java, OOP principles, frameworks and tools such as Spring, JOOQ and REST API;
Designed and implemented Java-based software architecture;
Tested, debugged and optimized applications to improve performance and reliability.

Career break

from 03.2019 to 10.2021 (2 years 8 months)
Working on a personal project

Education

Vinnitsa National Technical University

Information Systems and Technologies, Вінниця
Higher, from 2021 to 2026 (5 years)

Additional education and certificates

2022, 1
Certificate

Knowledge and skills

  • Git
  • SQL
  • GitHub
  • C#
  • .NET
  • Java
  • Знання принципів ООП
  • REST API
  • Spring Framework
  • Spring boot
  • IntelliJ IDEA
  • Java Core
  • Здатність до навчання
  • HTML
  • JavaScript
  • Docker
  • Spring MVC
  • Spring
  • Знання технологій JDBC
  • JPA
  • Spring Data JPA
  • Unit-тестування
  • PostgreSQL
  • PostGIS
  • Postman
  • CRUD
  • Svelte.js
  • JUnit
  • Mockito
  • MariaDB
  • Knowledge of design patterns

Language proficiencies

  • Ukrainian — fluent
  • English — average

Additional information

Kaggle: https://www.kaggle.com/serhiihonchar
GitHub: https://github.com/Sergey-GG
Resume PDF: https://drive.google.com/file/d/1o5xLFQZAOpZvd1pZqL-f3Lh9IvoxVFGu/view?usp=sharing

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