Evgeniy

Evgeniy Popadiuk JAVA DEVELOPER
LinkedIn GitHub Telegram Email : [open contact info](look above in the "contact info" section)

SUMMARY
Disciplined,trainable and motivated Java developer with 1.5 years of experience in developing systems as a full-
stack developer using C#, .NET, TypeScript, and Angular technologies. My primary specialization is Java
development. The commercial experience I have gained has allowed me to significantly advance my skills in system
design, understanding processes, and having a general vision of the system development process.

Professional Skills
Hard skills
• Languages: Java 8–25, SQL, Groovy, TypeScript
• Frameworks & Libraries: Spring Boot, Hibernate/JPA, Camunda BPMN, Angular, .net
• Security: Spring Security, JWT, Filtres, CORS
• Data & Messaging: PostgreSQL, MySQL, Oracle PLSQL, Liquibase
• Testing: JUnit
• Frontend / UI: HTML, Angular,Typescript
• Build & CI/CD: Gradle, Maven, Jenkins, Docker
• Tools: Git, IntelliJ IDEA, Redmine, Swagge
• AI: AI coding agents

Soft skills
• System & Architectural Thinking
• Analytical Problem Solving
• API Contract Negotiation
• Fast Adaptability to New Tech

Work-experience
l2-absolute.com my Java Project | 01.03.2025 - 01.07.2026 (closed)
Game server for the legendary game Lineage 2, all scripts are in JAVA, I decompile, edit, and replace them without
any problems.
Full working Lineage 2 server. Built with Java for the back-end, Spring Boot; front-end (site and forum) in
TypeScript + Angular; database MySQL. As part of the project, I implemented:
• password hashing using the Whirlpool algorithm during registration, and secure verification on login.
• stateless authentication with JWT tokens stored in browser localStorage and sent with API requests to protected
endpoints.
• authorization via Spring Security.
• CORS policy configuration so only trusted domains can access the API; public vs protected endpoints clearly
separated.
• a custom request throttling filter to allow only one request per second per IP — helps mitigate potential DDoS and
spam.
• email confirmation of registration to verify user accounts.
• and other interesting features! See GitHub: memento370/ABSOLUTE_API

Full-Stack Developer in Medirent Solutions | 02.10.2023 - 14.02.2025 (1 year 5 months)
This was a position in an outsourcing company, so clients and projects varied; sometimes I was
reassigned to different development teams. Most of the projects were government systems and registers,
with a primary focus on enhancing existing features and developing new functionality.
• Front-end: designing and editing UI forms, HTML forms; redesigning existing forms and supporting current
form functionality.
• Back-end: working in a microservice architecture; maintaining an existing back-end in C#/.NET; building new back-
end components from scratch; processing documents, images, and other data.
• Database: using Oracle PL/SQL where most data retrieval logic was implemented in stored procedures.
Technologies: C#, .NET, TypeScript, Angular, Oracle PL/SQL.