Олег

OLEG LOGINOV
JAVA DEVELOPER
Zaporizhzhia, Ukraine • [open contact info](look above in the "contact info" section) • [open contact info](look above in the "contact info" section) • LinkedIn • Telegram • UpWork • GitHub

Junior Java Developer with a strong backend foundation, with over 3 years of experience in building
scalable web applications. Recently transitioned from PHP/Laravel to Java/Spring Boot and developed a
production-grade RESTful API with authentication, authorization, testing, and containerization. Passionate
about clean architecture, secure APIs, and continuous learning. Seeking a Java backend role to apply solid
fundamentals in a real-world team environment.

SKILLS

●​ Languages & Frameworks: Java, Java Core, Spring Boot, Spring Security, Hibernate, JPA, PHP,
Laravel
●​ Tools & Platforms: MySQL, Docker, Flyway, Maven, Git, Postman, JUnit, Mockito, OAuth2
●​ Frontend: Vue.js (basic), JavaScript
●​ Other: REST APIs, JWT, SQL optimization, Agile, GitHub, Postman
●​ Languages: English (Upper-Intermediate), Ukrainian (Advanced)

FEATURED PROJECTS
JavaToDoList-API​ GitHub Repository​
Java Developer
A fully containerized Java-based REST API for managing tasks and categories.

●​ Built with Java 17, Spring Boot, Hibernate, MySQL, Docker, and Flyway
●​ Integrated JWT authentication with Spring Security, including role-based access (USER, ADMIN,
MODERATOR)
●​ Implemented CRUD operations, filtering, category linking, and security constraints
●​ Diagnosed and resolved real-world issues such as 403 Forbidden errors and
DataIntegrityViolationException
●​ Achieved 85% test coverage using JUnit and Mockito
●​ Designed API documentation and tested endpoints with Postman
●​ Set up local dev environment with Docker Compose for MySQL and Spring containers

PROFESSIONAL EXPERIENCE
UpWork (NDA Project)​ 2022 – 2024
PHP/Laravel Developer
●​ Developed custom Laravel-based quoting system with Vue.js frontend
●​ Integrated third-party APIs and implemented OAuth 2.0 for secure access
●​ Optimized PDF generation and background task processing using Laravel Jobs and WebSockets
●​ Improved backend responsiveness by 25% through performance refactors
●​ Collaborated directly with international clients on requirements and delivery
Rezet​ ​ 2022 – 2022
PHP/Laravel Developer + Vue.js
●​ Implemented RESTful APIs using Laravel, streamlining data exchange between front-end Vue.js
components and back-end services, resulting in a 20% reduction in API response latency.
●​ Integrates third-party APIs and optimizes SQL queries for enhanced performance.
●​ Refactored legacy code for scalability.
EDUCATION & CERTIFICATIONS
Classical Private University, Zaporizhzhia, Ukraine​ 2009 – 2013
Bachelor’s Degree, English Interpreter

Courses:
●​ The Complete Java Development Bootcamp – Udemy
●​ The Complete Spring Boot Development Bootcamp – Udemy