Особисті дані приховані

Lviv, Ukraine
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Denys Sych [відкрити контакти](див. вище в блоці «контактна інформація»)
[відкрити контакти](див. вище в блоці «контактна інформація»)
GitHub Java Backend Developer
Second-year Software Engineering student at Lviv Polytechnic specializing in backend development with
hands-on experience building production-ready Java + Spring Boot applications. Developed an enterprise-grade e-
commerce platform (9,700+ LOC) featuring JWT authentication, role-based access control, 25+ test files, and
Docker containerization. Strong foundation in Java Core, Spring ecosystem, and clean architecture principles.
Seeking a software engineering internship to apply backend skills in a professional environment.

Projects | Practical Experience
Enterprise Book Store Service (GitHub) | Java 17, Spring Boot, PostgreSQL, Docker
• Secure Architecture: Developed a secure, stateless MVC Web Application using Spring Boot 3 and Spring
Security, implementing JWT authentication and Role-Based Access Control (RBAC).
• Performance Optimization: Diagnosed and resolved Hibernate N+1 problems using @EntityGraph, significantly
improving query performance for complex data retrieval.
• DevOps & Quality: Containerized the database with Docker Compose for consistent environments and
implemented global exception handling via @ControllerAdvice.
EPAM Training Projects | Java Professional, Database, Web Development, Spring(Core, MVC, Boot, Security)
• Test-Driven Development: Built 10+ utility applications using TDD cycles, achieving 90%+ test coverage with
JUnit 5 and Mockito.
• Concurrency Mastery: Implemented multi-threaded Tic-Tac-Toe game handling concurrent player moves with
proper synchronization and deadlock prevention.
• Data Processing: Developed custom JSON/XML parsers from scratch to deeply understand serialization, I/O
streams, and performance optimization.

Technologies and Languages
• Language: Java 17 (Core, Collections, Stream API), C/C++, SQL, XML, JSON.
• Frameworks: Spring Boot 3, Spring MVC, Spring Security (JWT), Spring Data JPA, Hibernate.
• Testing: JUnit 5, Mockito, TDD (Test Driven Development).
• Database: PostgreSQL, H2, JDBC, DAO Pattern.
• Concurrency: Multithreading, Synchronization, Locks, Asynchronous Computing.
• Tools & DevOps: Docker, Docker Compose, Maven, Git, Postman.
• Concepts: OOP, SOLID Principles, RESTful APIs, JVM Internals (Memory Management, GC), Design Patterns
(Factory, Strategy, Observer, Decorator, Adapter).

Education and Certifications
Bachelor of Science in Software Engineering Lviv Polytechnic National University
Lviv, Ukraine 2024 – Present (Expected Graduation: 2028)
• Focus: Object-Oriented Programming, Data Structures & Algorithms, Database Systems, Operating systems,
Computer Architecture and Networks, Discrete Mathematics, Mathematical Analysis.
Java Fundamentals & Professional Program EPAM University Program | 2025
• Focus: Completed an intensive training program covering Java Core, Spring Ecosystem, and Database Design.
Mastered advanced topics including JVM Memory Management (Garbage Collection), Java Concurrency, and
GOF Design Patterns. Gained practical experience with build tools (Maven) and unit testing frameworks (JUnit 5,
Mockito).

Languages
• English: C1 (Advanced)
• Ukrainian: Native