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PYROZHENKO Github

NAZAR linkedin

Lviv/Kyiv

About Result-oriented Java Backend Developer with practical experience in building scalable RESTful
applications using Spring Boot and Hibernate. Skilled in database design, secure API development
Me (JWT, OAuth2), and third-party integrations (Stripe, Nova Poshta). Proficient in containerization with
Docker and optimizing system observability using Spring AOP. Committed to solving complex
engineering challenges.

Skills Programming: Java (Core, Collections, Stream API, Multithreading & Concurrency).
Frameworks & Libraries: Spring Boot, Spring Security (JWT, OAuth2, RBAC), Hibernate, Spring AOP.
Databases & Caching: PostgreSQL, Redis.
Message Brokers: Apache Kafka (theoretical knowledge).
Testing: JUnit 5, Mockito.
Tools & DevOps: Docker, Docker Compose, Maven, Git, Postman, IntelliJ IDEA.
API & Integrations: RESTful API Design, Stripe API, Nova Poshta API, Google OAuth2.

Projects Bookstore
E-commerce platform for a book store using Spring Boot and PostgreSQL within a Docker environment.
Implemented complex business logic for payments (Stripe) and delivery (Nova Poshta), configured
robust security protocols (JWT, OAuth2), and integrated Aspect-Oriented Programming (AOP) for
system-wide audit logging.
Github

E-document management system
EDMS for universities, automating the full lifecycle of student applications. Implemented custom RSA
and SHA-256 digital signature module to guarantee data integrity and non-repudiation.
The system features a robust RBAC and JWT security framework for granular access control.
Github

Education Bachelor of Computer Science (2023-2027). Lviv Polytechnic National University.

Certifications
Java Fundamentals — EPAM University (2026)

CCNA: Introduction to Networks, Cisco (2025)

Language
Urkanian - Native
English - B2