Senior RDMA Performance Engineer

• Configure, troubleshoot, and maintain NVIDIA/Mellanox Spectrum switches and ConnectX Network Interface Cards (NICs)
• Implement and tune congestion control mechanisms for AI workloads, including RoCEv2, PFC, and ECN
• Optimize network environments for maximum throughput, minimal latency, and minimal Job Completion Time (JCT)
• Conduct performance benchmarking and validation testing on AI-ready data center fabrics using RDMA and NCCL
• Use AI agents and specialized tools to automate network tasks, testing, and network telemetry analysis
• Author and maintain technical documentation covering network designs, configurations, and benchmarking results
• Work within an Agile, startup-environment project team serving a US-based client

• 7+ years of professional experience in network engineering
• Preferably 3+ years specifically focused on data center network design and architecture
• Hands-on experience configuring and troubleshooting BGP, EVPN/VXLAN, LACP, and ECMP
• Deep understanding of AI-dedicated data center designs, including Rail-Optimized Design (ROD) and Rail-Unified Design (RUD) topologies, with practical experience configuring and deploying them
• Proven experience configuring, managing, and troubleshooting NVIDIA/Mellanox Spectrum switches and ConnectX Network Interface Cards (NICs)
• Deep understanding of RoCEv2, Priority-based Flow Control (PFC), and Explicit Congestion Notification (ECN)
• Ability to tune and optimize network environments, including switch buffer tuning and Quality of Service (QoS) policies
• Experience conducting performance benchmarking and validation for AI-ready data center fabrics using RDMA and NVIDIA Collective Communication Library (NCCL)
• Ability to leverage AI agents/tools to automate tasks, testing, and analysis
• Strong technical documentation skills and professional English communication
• Professional-level certifications such as CCNP/CCIE Enterprise/DC, JNCIP or equivalent are nice-to-haves
• Hands-on experience with pyATS, NAPALM, Batfish, Nornir, or NetBox is nice-to-have
• Exposure to GitLab CI, GitHub Actions, Jenkins, and IaC concepts is nice-to-have

• Flexible working hours and approach to work: fully remotely, in the office or hybrid
• Professional growth supported by internal training sessions and a training budget
• Solid onboarding with a hands-on approach
• A great atmosphere among professionals who are passionate about their work
• The ability to change the project you work on