Java Backend Developer focused on building reliable and scalable backend systems.
- Java (Core, Collections, Streams)
- Spring (Boot, MVC, Data JPA, Security)
- REST API
- PostgreSQL, SQLite
- Hibernate / JPA
- Docker, Docker Compose
- Git, Linux
- Basic Frontend: React, HTML, CSS
High-performance backend service for real-time streaming and processing of financial market data using the Tinkoff Invest API.
Includes a REST API and a Telegram bot for real-time monitoring.
Tech stack: Java, Spring Boot, PostgreSQL, Docker, gRPC (Tinkoff Invest API), Telegram Bot.
I worked on this project as a secondary developer, contributing to stream architecture design, REST API controllers, and Docker configuration.
👉 https://github.com/Vasilek1993111/InvestmentDataStreamService
Backend service responsible for loading and preparing investment data for further processing within the system.
Tech stack: Java, Spring Boot, Docker, SQL scripts, data pipeline automation.
My contribution included implementing and optimizing data loading logic at the service and backend layers.
👉 https://github.com/Vasilek1993111/InvestmentDataLoaderService
Backend service for processing and calculating trading operations, including API documentation, order calculation logic, and a caching layer.
Tech stack: Java, Spring Boot, REST API, caching, Docker.
My responsibilities included assisting with API documentation, writing tests, and contributing to caching modules.
👉 https://github.com/Vasilek1993111/InvestmentTradingService
REST API for currency exchange rates without heavy frameworks.
- Java Servlets
- JDBC + SQLite
- Clean layered architecture 👉 Repository: (link will be here)
Telegram bot for processing orders and collecting statistics.
- Python (aiogram)
- Google Sheets integration
- Role-based access (admin / courier) 👉 Repository: Link
- Advanced Spring & Spring Security
- Backend architecture & Clean Architecture
- Improving system design skills
Grow into a strong Middle+/Senior Java Backend Developer and work on complex backend systems in 2026.
- Telegram: @IvanAlexeevich