Денис

DENYS RADCHENKO
Java Developer

CONTACT PROFILE
Motivated Java Developer with a Master’s degree and a strong foundation
in microservices architecture. Experienced in building distributed systems
+ Ukraine using Spring Boot, Kafka, and Docker. Proven ability to implement secure
„ [open contact info](look above in the "contact info" section) authentication (OAuth2, JWT) and CI/CD pipelines.
# [open contact info](look above in the "contact info" section)
} @DenysRadchenko PROJECT EXPERIENCE
¨ github.com/FaPaH

SKILLS Event-Driven Order System  Link Pet Project
Stack: Java 17, Spring Boot, Kafka, PostgreSQL, Docker.
 Designed a distributed system using Event-Driven Architecture to
Languages & Core decouple services.
Java 17+, Stream API, Collections,  Implemented asynchronous communication between Order and Stock
Concurrency, SQL. services using Apache Kafka.
 Applied Database per Service pattern (PostgreSQL) to ensure loose
Spring Ecosystem coupling.
Spring Boot, Spring MVC, Security  Orchestrated infrastructure (Zookeeper, Kafka, DBs) using Docker
(OAuth2, JWT), Data JPA, Cloud Compose.
(Gateway, Eureka, Config), AOP.
Travel Agency Web App  Link EPAM Final Project
Architecture Stack: Spring Boot, Security (OAuth2), JPA, Thymeleaf.
Microservices, Event-Driven
 Developed a monolithic application with Role-Based Access Control
Architecture, REST API, Apache Kafka.
(Admin/User).
Databases & Caching  Implemented secure authentication via Spring Security (OAuth2
PostgreSQL, Oracle (JDBC), Redis, Google/GitHub).
Hibernate, Liquibase.  Designed dynamic search filters using Spring Data JPA Specifications.
 Integrated AOP for centralized logging of business operations.
DevOps & Tools
Docker, Docker Compose, CI/CD (GitHub Secure Microservices Platform  Link Pet Project
Actions), ELK Stack, Maven, Git. Stack: Spring Cloud (Gateway, Eureka), Redis, JWT.
 Configured Spring Cloud Gateway as a centralized entry point with
Testing
JUnit 5, Mockito, Integration Testing. JWT validation.
 Implemented Netflix Eureka for dynamic service discovery and load
LANGUAGES balancing.
 Developed an Auth Service utilizing Redis for managing refresh tokens.
English: Intermediate (B1) Microservices Infra & Observability  Link DevOps Project
Ukrainian: Native Stack: GitHub Actions, ELK, Spring Cloud Config.
 Configured Spring Cloud Config for centralized configuration
EDUCATION management.
 Implemented CI/CD pipelines using GitHub Actions for automated
Master’s in Computer Science
builds.
Sumy State University  Integrated centralized logging with ELK Stack (Elasticsearch, Logstash,
2021 – 2022 Kibana).

COURSES & TRAINING

EPAM Systems 2025 – 2026
Java Development Program
 Gained strong foundation in Spring Framework, Servlets, and Web
Programming.
 Developed web apps using MVC architecture, Design Patterns and
database interactions.
Netcracker 2021 – 2022
Java Enterprise Training
 Project: Inventory Management System (Spring MVC, Oracle, JSP).
 Developed a 3-tier web application using pure JDBC for data access.