Title: Back End Developer - Java/Kotlin Location: Richfield, MN (Hybrid - 2 days/Week) Duration: 6-12 months contract The project includes: building and enhancing seller-facing campaign management workflows,integrating with external advertising platforms such as Criteo and ad-serving systems,implementing reporting, spend tracking, and billing event pipelines,improving campaign synchronization and product eligibility systems,and modernizing frontend and backend architecture for scalability and m