Personal information hidden Veteran

ANDRII BESEDA
JAVA BACKEND DEVELOPER
Lviv, Ukraine | [open contact info](look above in the "contact info" section)
[open contact info](look above in the "contact info" section)
PROFESSIONAL SUMMARY
Java Backend Developer with 2 years of commercial experience building business systems for retail, accounting,
and communications. Skilled in Java, Spring Boot, SQL, Hibernate/JPA, and REST APIs. Develop integrations
with banks, payment services, marketplaces, logistics, and telephony providers. Freelance POS experience
includes checkout flows, inventory, receipt printing, hardware integration, and AI-assisted invoice processing.

TECHNICAL SKILLS
Java / Backend: Java 8+, Spring Boot, Spring MVC, Spring Security, Spring Data JPA, Hibernate, REST APIs,
OpenAPI/Swagger, MapStruct
Databases: SQL, PostgreSQL, Flyway, Liquibase; Redis (basic), SQLite and JDBI (introductory hands-on experience)
Integrations: REST/SOAP APIs, WebSocket, Webhooks, Quartz, ESC/POS, Java Print Service
Tools: Git, Maven, Docker, Linux, JUnit 5, Mockito, Testcontainers, AWS EC2/RDS; Gradle, Azure Pipelines,
bash (basic)
Domain knowledge: payments, POS, inventory management; basic understanding of Ukrainian PRRO, QES

PROFESSIONAL EXPERIENCE
Java Backend Developer | Product Company | January 2025 – Present
• Handle backend tasks from requirements analysis and API/data-model design through implementation,
automated testing, and code review; develop order management, finance, and inventory modules.
• Worked with PrivatBank, NovaPay, UKRSIBBANK, and other banking APIs: accounts, balances, transactions,
payments, authentication, unified payment sources via the Strategy pattern, transaction reconciliation, and
payment scheduling.
• Developed logistics and warehouse workflows: Nova Poshta API, shipping documents, scan sheets, tracking, and
bulk shipment processing; inventory lots, stock reservations, backorders, and cost calculations.
• Extended Prom.ua integrations: manager chats, messages, templates and attachments, order imports, delivery/payment
mapping, and status synchronization; also worked with Rozetka, Excel product imports, and pricing.
• Implemented Binotel telephony workflows via REST, WebSocket, and Webhooks: active and historical calls,
call cards, employee synchronization, concurrent-event handling, and rate limiting.
• Improved integration reliability using Quartz jobs, incremental synchronization, monitoring, failure handling, and
retries; optimized SQL/JPA (batch fetching, keyset pagination, PostgreSQL indexes) and wrote unit/integration tests.

FREELANCE PROJECTS
Retail POS System | Freelance | 2024
• Developed checkout, carts, inventory management, stocktaking, barcode-based product lookup, and non-fiscal
thermal receipt printing (ESC/POS, Java Print Service); worked with bank POS terminals and smart scales.
• Built an asynchronous photo/PDF invoice-processing workflow with the OpenAI API: extraction of items, barcodes,
quantities, and handwritten prices; database product matching and updates prepared for administrator review.
• Supported automatic application of high-confidence results and manual review of ambiguous data;
used SHA-256 to detect duplicate file uploads; PostgreSQL, JPA/Flyway, and AWS deployment work.
Veterinary Appointment System | Freelance | 2024
Developed a Java/Spring Boot backend for Telegram appointment booking, veterinarian scheduling and CRM,
notifications, and reminders; deployed on AWS EC2 with PostgreSQL RDS, Flyway, and Linux/systemd.

EDUCATION & LANGUAGES
Master’s Degree in Fire Safety, Lviv State University of Life Safety (2022) | Ukrainian: native; English: B1