GitHub is enhancing its infrastructure to efficiently manage network traffic and improve performance by focusing on DNS routing, transit, and peering connections. Transit refers to connections with Internet providers, whereas peering involves direct connections between networks, notably through private network interconnects (PNI) and Internet exchanges (IX), which facilitate cost-effective and high-performance traffic routing. By expanding transit capacity and integrating a second region, GitHub has mitigated the impact of volumetric DDoS attacks and improved latency through fewer hops between networks. The use of GeoDNS enables directing traffic to the closest region, optimizing network routing based on geographic location. Peering now accounts for a significant portion of GitHub's traffic, emphasizing its importance in performance and cost savings. The company is actively seeking to expand its team with Site Reliability Engineers and an Engineering Manager to continue advancing its network and traffic engineering capabilities.