Vedran Ljubovic

Developed and maintained auto-copy (social trading) backend service (Java, Quarkus, PostgreSQL). Reengineered and optimized the system architecture for high performance and load, with special focus on efficiently reading and caching user account statuses from Redis and low-latency response to incoming trade events from Kafka. Various copying statistics are updated in ClickHouse analytics database. Developed and maintained a critical service for wallet management, funding user trading accounts based on complex criteria (Python, Uvicorn, FastAPI). Managed transfer statistics (ClickHouse) and executed actual transfers via inter-service REST interface.

Teacher on courses: Introduction to Programming, Software Development, Advanced Software Development, with a total of 1000+ students. Teaching assistant on courses: Programming Techniques, Algorithms and Data Structures, Web Technologies, Software Engineering, Multimedia Systems, with a total of 2000+ students. Co-authored a book titled “Introduction to Programming - C and C++”, over 1000 copies sold. Authored a book on Java programming (to be published - used internally). Authored 15 scientific papers (h-index 7) on image processing, machine learning and source-code and software repository analysis. Developed in-house student information system - Zamger (PHP, MySQL, Jasper reports), used continuously since 2007 as the main Faculty information system. Developed in-house programming education system featuring a web-based IDE for C and C++, with full educational management backend (PHP & NodeJS), used since 2015 to host 300-500 students per year. Developed an AI-based gamification system for teaching programming (UUP Game) in NodeJS, TypeScript (React) and PostgreSQL (paper/s/ to be published). Developed an AI-based plagiarism detection system (a journal paper is published about it). Led teams of students working on aforementioned production information systems for their final year project. Study program coordinator for short-cycle program “Software Development” (2018-2021).

Developed the core architecture and security components for Authentication & Authorization Infrastructure (AAI) using KeyCloak and OAuth. Reverse-engineered an undocumented internal student information system and developed components for it (C#, MVC.NET, Entity framework, MS SQL Server 2008, MS SSRS). Maintained servers that host above systems. Prepared a detailed architectural document for future information system (Java, Spring, microservices).

Zimbra e-mail/groupware solution deployed to several enterprise clients. Samba file and printer sharing deployed to several enterprise clients. Developed a GUI installer for Linux for a Java-based desktop application (customer: Comp2000). Reverse-engineered an old DOS-based application to add custom reporting using Crystal Reports.