Yaroslav Kozyrevych

Worked on an enterprise document management system that automates the processing, classification, and routing of digital documents. The system extracts text and metadata, applies business workflows, and exports structured data to external systems. The project involved close integration with Python-based services for intelligent document processing and analytics. - Implemented integration from scratch with major external systems - Sped up individual document workflow steps by 60% on average.

Worked on a brokerage platform that facilitates trading between buyers and sellers. Our team developed a Client Risk Management System to monitor and evaluate client risk profiles, ensuring secure and compliant trading operations. - Extended the system to support an additional investment unit. - Migrated from simple Kafka consumers to Kafka Streams, enabling real-time aggregation and efficient data processing - Upgraded services from Java 7 and Spring Boot 1 to Java 11 and Spring Boot 2

Worked on a leave and time-off management system that helps managers track employee availability, centralize workforce data, and generate reports. The platform lets employees easily book and manage time off from any device. - Optimized SQL queries, improving database performance by an average of 50% across multiple microservices. - Developed a Spring Boot service enabling employees to select vacation dates, calculating remaining leave balance, available dates, and deducted days.