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xAI · 2 weeks ago

RDMA Engineer - Supercomputing

Palo Alto, CA

Full-time

Hybrid

Mid, Senior Level

$180K/yr - $440K/yr

xAI is on a mission to create AI systems that enhance humanity's understanding of the universe. They are seeking an RDMA Engineer to design and optimize networking solutions for GPU supercomputing clusters, focusing on low-latency and high-bandwidth communication systems.

Artificial Intelligence (AI)Information TechnologyFoundational AIGenerative AIMachine Learning

Growth Opportunities

H1B Sponsor Likely

Responsibilities

Develop and tune RDMA-based communication systems leveraging NVIDIA GPUs and Mellanox NICs (InfiniBand, RoCE) for ultra-fast data transfer between nodes

Implement and optimize GPUDirect RDMA to enable direct memory access between GPUs and network interfaces, minimizing CPU overhead

Integrate RDMA solutions with Kubernetes-based workloads, ensuring seamless operation across distributed compute and storage systems

Collaborate with AI researchers and infrastructure teams to accelerate data pipelines and collective communications using NCCL and MPI

Troubleshoot and resolve performance bottlenecks in high-throughput, low-latency networking environments

Qualification

NVIDIA RDMA technologiesRust programmingC/C++ programmingMPINCCLKubernetes networkingDistributed systems optimizationPrioritization skillsCommunication skillsWork ethic

Required

Hands-on experience with NVIDIA RDMA technologies (e.g., GPUDirect RDMA, RoCE, InfiniBand) in HPC or AI supercomputing environments

Proficiency in programming with Rust, C, or C++ for low-level networking and system optimization

Familiarity with NVIDIA's networking stack, including Mellanox drivers, libraries (e.g., libibverbs), and tools (e.g., NVPeerMemory)

Experience optimizing distributed systems with MPI, NCCL, or similar frameworks for GPU-accelerated workloads

Knowledge of Kubernetes networking and integrating RDMA into containerized environments

Preferred

Background in AI/ML training workflows and their networking demands (e.g., large-scale parameter synchronization)

Company

xAI

XAI is an artificial intelligence startup that develops AI solutions and tools to enhance reasoning and search capabilities.

Founded in 2023

Palo Alto, California, USA

1001-5000 employees

https://x.ai

H1B Sponsorship

xAI has a track record of offering H1B sponsorships. Please note that this does not guarantee sponsorship for this specific role. Below presents additional info for your reference. (Data Powered by US Department of Labor)

Distribution of Different Job Fields Receiving Sponsorship

Represents job field similar to this job

Trends of Total Sponsorships

2025 (1)

Funding

Current Stage

Late Stage

Total Funding

$42.73B

Key Investors

Neptune Digital AssetsSpaceXMorgan Stanley

2026-02-02Acquired

2026-01-06Series E· $20B

2025-12-11Secondary Market· $0.3M

Leadership Team

Greg Yang

Co-Founder

Yuhuai Wu

Co-Founder

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Company data provided by crunchbase