Horses Owners Platform: An online marketplace and community platform for horse owners, enabling users to buy, sell, and register horses.

Responsibilities:

• Troubleshot and resolved backend issues, ensuring system stability.
• Designed and optimized RESTful APIs, improving system reliability.
• Integrated mail messaging for notifications and user alerts.
• Developed and maintained backend using Java and PostgreSQL.
• Deployed and managed services using Docker for scalability.

Web Game Simulation: A simulation game for an insurance corporation, where users manage life choices such as buying a house, car, and insurance.

Responsibilities:

• Participated in all stages of server-side development, from architecture design to deployment.
• Collaborated with developers and stakeholders to align technical solutions with business needs.
• Designed and optimized RESTful APIs, improving system reliability and response time.
• Developed and maintained backend services using Java, Spring Boot, and PostgreSQL.
• Implemented authentication and authorization using Spring Security.
• Managed database migrations with Flyway, ensuring data integrity.
• Deployed and orchestrated services using Docker for scalability.

Banking System: A financial application handling account management, transactions, and customer support.

Responsibilities:

• Collaborated with cross-functional teams to align technical solutions with business needs.
• Automated build and deployment processes using Jenkins, improving CI/CD efficiency.
• Designed and secured RESTful APIs, ensuring compliance with banking regulations.
• Implemented and optimized payment processing systems for secure transactions.
• Monitored and optimized system performance using SLF4J and Logback.
• Developed and maintained services using Java, Spring, and Sybase.

Inner projects:

• Advertisement System: Built an Android application for displaying dynamic advertisements in public places.
• Transaction Service: Developed a backend service for updating transaction data from remote sources.

Numismatics Platform: A platform for coin collectors to identify and search for coins based on scanned images.

Responsibilities:

• Integrated Google Cloud Vision (GCP Vision) for image recognition and coin identification.
• Built search functionality using Elasticsearch, improving data retrieval efficiency.
• Designed and implemented a web scraper to collect coin data from external sites.
• Initiated and developed the project from the ground up to full implementation.
• Developed backend services using Kotlin, PostgreSQL, and Hibernate.
• Designed and optimized database schemas for scalable data storage.
• Ensured system stability with unit tests using JUnit and Mockito

Sports & Health Platform: A health-tracking platform integrating payment services for fitness subscriptions.

Responsibilities:

• Designed and developed RESTful APIs for user interactions and payment transactions.
• Optimized backend performance, reducing response times and improving scalability.
• Wrote unit and integration tests using JUnit and Mockito to ensure code quality.
• Implemented structured logging with SLF4J and Logback for better monitoring.
• Fixed critical bugs and enhanced system stability through rigorous testing.
• Documented technical processes, ensuring maintainability and scalability.
• Integrated BlueSnap payment system for seamless subscription processing.

Auto Parts Marketplace: An online marketplace for buying and selling auto parts.

Responsibilities:

• Implemented a Telegram bot for automated user interactions and order tracking using the Micronaut framework.
• Created and maintained technical documentation for all microservices using Swagger Editor.
• Developed and optimized backend logic for handling product listings and transactions.
• Wrote unit and integration tests using JUnit and Mockito to ensure code reliability.
• Implemented structured logging with SLF4J for better monitoring and debugging.
• Integrated MongoDB and PostgreSQL for efficient data storage and retrieval.
• Improved system performance by identifying and fixing bugs.