Fifth-generation (5G) wireless networks apply the concept of network slicing for accommodating multi-heterogeneous service requirements over shared physical infrastructure. This work presents the design, implementation, and test of a 5G core network slicing architecture based on Open5GS and UERANSIM. Three logical slices were set up to simulate three different service categories: enhanced Mobile Broadband (eMBB), Ultra-Reliable Low Latency Communication (URLLC), and massive Machine-Type Communication (mMTC). Each slice was designed to meet its corresponding performance requirements in terms of data throughput, latency, and connectivity density. Traffic behavior followed by the system dynamically allocated the user equipment (UE) to slices based on traffic behavior, emulating actual service behavior. Performance was measured with synthetic traffic per slice type, and latency, packet loss, and throughput metrics were inspected. The results confirm the viability of end-to-end slicing in an open-source 5G network and show efficient resource isolation and performance differentiation per slice.