Djordje Zrnic

Leading the design and development of a multi-tenant, whitelabel platform serving Beauty Salons, Fitness Centers, Medical Practices, and other business verticals, enabling each client to operate with distinct branding, workflows, and client-facing experiences.

Multi-Tenant Architecture: Engineered a secure, isolated platform supporting multiple business verticals from a single shared codebase, wi

Leading the modernization of a legacy shipping logistics platform while guiding a team supporting a complex ecosystem of e-commerce integrations. Responsible for end-to-end platform architecture, feature development, and operational reliability for mission-critical logistics systems.

Key contributions:

Platform Modernization: Migrated a legacy monolithic system to a scalable Laravel architecture

Developed an automated usage-based billing system by integrating Billomat with a Laravel-based application. Implemented subscription management using Laravel Cashier and Stripe, enabling automatic monthly payments for predefined pricing tiers. Refactored and extended the existing billing and invoicing logic within the Laravel framework to meet specific project requirements and client expectations.

Ensured the security, reliability, and performance of Laravel-based platforms, implementing role-based access, audit logging, automated monitoring, and CI/CD integrations. Optimized backend processes and data flows to maintain scalable, high-performing, and compliant applications across production-critical environments.

Worked as Magento Developer at KNIGHTX.

Pursued a degree in Information Technology at the University of Novi Sad, Faculty of Sciences, from 2017 to 2021.