Software Engineer, Core Network Engineering

About this role

Join OpenAI's Core Network Engineering team to design and operate the high-performance networking infrastructure powering large-scale AI training and inference systems. You'll work across datacenter fabrics, host networking, and global WAN systems where microseconds of latency directly impact model efficiency.

What you'll do

• Design and operate networking systems supporting large-scale AI training and inference infrastructure
• Optimize performance and reliability across host networking, datacenter fabrics, and WAN technologies
• Develop automation for provisioning, configuration management, and infrastructure lifecycle operations
• Build observability and diagnostic tooling for network health, performance analysis, and remediation
• Optimize high-performance networking technologies including RDMA, RoCE, InfiniBand, and GPU interconnects
• Partner with compute, storage, and hardware teams on architecture, capacity planning, and reliability

What they're looking for

• Linux networking and kernel systems
• High-performance networking technologies (InfiniBand, RoCE, DPDK, Ethernet fabrics)
• Datacenter or WAN networking architecture
• C++, Python, or Go
• RDMA and NIC optimization
• Distributed systems debugging and performance analysis
• Infrastructure automation and configuration management
• Systems fundamentals (networking, OS, distributed systems)