Особисті дані приховані

Denys Sych
📍 Lviv, Ukraine | ✉ [відкрити контакти](див. вище в блоці «контактна інформація») | 🔗 [відкрити контакти](див. вище в блоці «контактна інформація») | 🐙 github.com/murf111

SKILLS
Technologies:
- Back-End: Java 17, Spring Boot 3, Spring Cloud, Spring Security, Spring Data JPA, Hibernate
- Front-End(basic): JavaScript, HTML/CSS
- Tools: Apache Ka ka, RabbitMQ, Redis, Docker, Maven, Git, Flyway, PostgreSQL, MongoDB, Linux (Terminal/SSH),
Postman
- API: RESTful APIs, Microservices, Swagger/OpenAPI
- Cloud: AWS (EC2, RDS)

Computer Science:
- OOP, SOLID, TDD, Agile/Scrum, Design Patterns
- Multithreading, Java Concurrency, JVM Internals
- Monolithic/distributed environments
- Unit/integration testing (JUnit 5, Mockito)

Languages: English (B2+), Ukrainian (Native)

SUMMARY
Motivated Java Backend Developer with 1 year of experience designing scalable RESTful APIs and
distributed systems. Pro icient in Java 17, Spring Boot, Hibernate, and PostgreSQL. Passionate about writing clean,
well-designed code using TDD and Agile/Scrum methodologies. With hands-on experience deploying to AWS
(EC2, RDS) and utilizing Linux environments
I consider myself a business-oriented developer with a high level of English and strong communication
skills. I am focused on delivering high-quality, ef icient software that brings real business value. I am a highly
adaptable and collaborative team player, currently open to remote or Lviv-based opportunities.

EXPERIENCE
Java Software Engineer
EPAM 10.2025 - Present, Lviv, Ukraine • Remote
GymCRM System
Tech Stack: Java, Spring Boot, Hibernate, Spring Data JPA, REST API, Swagger/OpenAPI, Maven
- Developed scalable RESTful APIs following SOLID principles, utilizing DTOs and documenting endpoints with
Swagger/OpenAPI.
- Optimized database performance by pro iling the data access layer and resolving critical Hibernate N+1
bottlenecks.
- Refactored core business services to improve maintainability, manage dependencies, and implement data
pagination.
Enterprise Book Store Service
Tech Stack: Java 17, Spring Boot 3, Spring Security (JWT), PostgreSQL, Docker Compose, JUnit 5, Mockito
- Secured the application by implementing stateless JWT authentication and Role-Based Access Control (RBAC)
via Spring Security.
- Optimized data retrieval using @EntityGraph to ix N+1 issues, achieving sub-100ms response times for 200+
concurrent requests.
- Applied Test-Driven Development (TDD) principles to achieve 90%+ code coverage using JUnit 5 and Mockito,
and containerized the local infrastructure using Docker Compose.
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Java Software Engineer
Self-employed
Banking REST API
Tech Stack: Java 17, Spring Boot, Spring Cloud, Apache Ka ka, Resilience4j, Zipkin, PostgreSQL, Flyway, Docker,
AWS (EC2, RDS)
- Architected a microservices backend using Spring Cloud, deploying to AWS EC2/RDS via GitHub Actions CI/CD.
- Integrated Apache Ka ka for event-driven communication, ensuring data consistency across distributed
transactions.
- Implemented Resilience4j (circuit breakers) for fault tolerance and Zipkin/Micrometer for distributed tracing.

EDUCATION
Bachelor's degree, Software Engineering
Lviv Polytechnic National University • 2024 - Present (Expected Graduation: 2028)
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