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Illia Sapa
Java Backend / Fullstack Developer (Java, Spring Boot, Angular)
[open contact info](look above in the "contact info" section) [open contact info](look above in the "contact info" section) Banská Bystrica

Summary
Junior Java Backend and Fullstack Developer with 1+ year of hands-on experience building scalable backend systems and modern web applications. Developed Cipher
- a full-stack trading and investment platform with real-time WebSocket integrations, JWT authentication, and PostgreSQL on the backend, and Angular on the frontend.
Experienced in designing and implementing REST APIs, working with relational databases, and building features end-to-end. Comfortable working across the entire
stack and delivering complete features end-to-end. Currently pursuing a degree in Applied Informatics at Matej Bel University, Slovakia.

Education
Matej Bel University Bachelor's
Applied Informatics and Software Development Banská Bystrica • Sep 2024 — Jun 2027

Experience
Nastartovac s.r.o. Banská Bystrica
Frontend Web Developer Apr 2025 - Present
• Developed and customized WordPress websites for clients using Elementor, Blocksy, Shopify and WooCommerce
• Implemented multilingual support with WPML for international projects
• Built responsive and cross-browser compatible layouts using HTML5 and CSS3
• Collaborated with project managers to deliver client requirements on time

https://www.nastartovac.sk/

Projects
Cipher - Trading & Investment Platform
Java 17, Spring Boot, Hibernate, JPA, PostgreSQL, WebSocket, Lombok, Angular
• Built a full-stack trading and investment platform covering both cryptocurrency and traditional financial assets
• Implemented real-time price updates via WebSocket integration with Binance and Finnhub APIs
• Developed JWT authentication and user account management
• Built multi-portfolio system allowing users to create and manage multiple investment portfolios
• Implemented portfolio and account performance tracking with dynamic charts
• Worked across the full stack - Spring Boot backend and Angular frontend - delivering complete features end-to-end
• Containerized the application with Docker for consistent local development and deployment

https://gitlab.umb.sk/prg-3/projekty_2025-2026/spkteam/-/tree/test?ref_type=heads

Skills
Backend
Java, Spring Boot, REST API design, Hibernate, JPA, WebSocket, JWT, Maven, Lombok

Frontend
Angular, TypeScript, JavaScript, HTML, CSS

Database
PostgreSQL, MySQL, SQL

Tools
Git, GitLab, Docker, Linux

Languages
English
B2

Ukrainian
Native

Slovak
B1