Mykhailo

Chernobai Mykhailo
JAVA DEVELOPER
Poland, Warsaw (Remote) | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | Telegram | LinkedIn | GitHub

SKILLS

●​ Languages: Java, SQL, JavaScript, HTML, CSS, Bash
●​ Java Ecosystem: Spring Framework (Boot, MVC, Cloud, Security, Data), Hibernate, JUnit, Mockito,
Maven
●​ Databases & Storage: PostgreSQL, MongoDB, Redis
●​ Architecture & Paradigms: REST API, OOP, DDD, SOLID, TDD, Design Patterns
●​ Tools & DevOps: Docker, Kafka, Git, Grafana, Prometheus, Micrometer, Zipkin, Loki, IntelliJ IDEA,
Postman, Linux
●​ Other: TestContainers, Neovim, cURL

EXPERIENCE

UkrSoftLab​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2024 May - 2025 June

Junior Java Developer
Promoted from Intern to Junior Developer for consistently delivering clean, maintainable backend solutions.

●​ Feature Development: Took part in developing key backend modules for order tracking, validation
logic, and SLA-related features, implementing complex business rules for order lifecycle management.
●​ System Integration: Collaborated on integration with critical external systems (geolocation, delivery
APIs), focusing on data validation and consistency, which reduced rejected requests from partner
systems.
●​ Performance Optimization: Participated in database performance initiatives; optimized SQL queries in
the tracking module, improving response time for high-load endpoints by ~15%.
●​ Code Quality & Testing: Wrote comprehensive unit and integration tests (JUnit, Mockito) for new
features and regression coverage. Actively participated in code reviews and refactoring discussions to
maintain high code standards.
●​ Agile Collaboration: Engaged in the full Agile/Scrum cycle using Jira and Confluence, including sprint
planning, grooming, and retrospectives to ensure timely delivery of team goals.

Tech Stack: Java, Spring Framework, SQL, Git, Maven, JUnit, IntelliJ IDEA, Linux

EDUCATION

Kharkiv secondary school 49​ ​ ​ ​ ​ ​ ​ ​ Ukraine, Kharkiv
General secondary education.
HOBBIES AND INTERESTS

Linux System Exploration | Information Security | OSINT | Movie Watching

LANGUAGES

English - B2 | Russian - Native | Ukrainian - Native