Dimitrije Stasic.

• Contributed to a multi-tenant enterprise ESG and greenhouse-gas emissions platform (Django REST Framework, MySQL, Docker) that serves three branded frontends from one shared backend.
• Built REST APIs for the emissions engine (Scope 1–4 calculations, AI recommendations) on a DTO-service architecture with JWT authentication and standardized response schemas.
• Implemented multi-tenant company isolation: derived tenant context from the authenticated user and scoped every database read and write so no company can access another's data, proving it with automated two-tenant isolation tests against a Dockerized MySQL.
• Developed AI recommendation APIs as a rule-based engine with company-scoped persistence, audit logging, and a documented integration contract for a teammate's module.

• Built a browser-based DICOM PHI anonymizer applying 300+ de-identification rules per HIPAA standards.
• Extended the open-source OHIF medical imaging viewer with a custom React radiology assessment panel.
• Developed a FastAPI and React user-management system with JWT auth, RBAC, and multi-tenant data isolation.

• Contributed to backend development of a career-verification platform, building database records in Kotlin.
• Developed company-management features and REST API integrations under senior-engineer supervision.
• Adopted team coding standards and Git version-control practices in a professional development environment.

• Built RESTful APIs with Spring Boot and PostgreSQL, improving backend response times for client applications.
• Tested and debugged backend modules using JUnit, reducing production bugs and improving release stability.
• Deployed APIs via Docker in a staging environment, accelerating cross-team integration testing.

Graduating students throw out usable dorm furniture every May while first-years buy the same things new in August. DormSy is a campus marketplace that connects the two.

Next.js · TypeScript · Express · Supabase · PostgreSQL · Railway

A party game born from a night of playing Spy with friends: we're all sports fans, so I remade it around sports players and clubs instead of everyday places, with two AI-driven modes that generate the words through an OpenAI-backed Supabase Edge Function.

React Native · Expo · TypeScript · Supabase · OpenAI

A full-stack platform for a small medical practice: role-based staff access, patient records, scheduling, and automated reporting.

React · Node.js · Express · PostgreSQL