Performance Engineer
Palo Alto, CA · On-site
Job Summary : RadixArk is an infrastructure-first company focused on building world-class open systems for AI inference and training. They are seeking a Performance Engineer to enhance the ...
RadixArk
47 Radixark Jobs Hiring Near You
Performance Engineer
Palo Alto, CA · On-site
Job Summary : RadixArk is an infrastructure-first company focused on building world-class open systems for AI inference and training. They are seeking a Performance Engineer to enhance the ...
Controller
Palo Alto, CA · Hybrid
This is a rare opportunity to define what financial rigor looks like at RadixArk - and to build it yourself. We move fast, operate with a sense of urgency, and expect the same from everyone on the ...
Controller
Palo Alto, CA · Hybrid
This is a rare opportunity to define what financial rigor looks like at RadixArk - and to build it yourself. We move fast, operate with a sense of urgency, and expect the same from everyone on the ...
RadixArk is an infrastructure-first AI company seeking a Member of Technical Staff -- Supercomputing to build, deploy, and operate production-grade AI infrastructure. The role involves working on ...
RadixArk is an infrastructure-first AI company seeking a Member of Technical Staff -- Supercomputing to build, deploy, and operate production-grade AI infrastructure. The role involves working on ...
About the Role RadixArk is seeking a Member of Technical Staff - Diffusion Model to advance the frontier of generative modeling. You will work on cutting-edge diffusion and flow-based models for ...
About the Role RadixArk is seeking a Member of Technical Staff - Diffusion Model to advance the frontier of generative modeling. You will work on cutting-edge diffusion and flow-based models for ...
About the Role RadixArk is seeking a Member of Technical Staff - Inference to push the limits of large-scale AI inference. You will work on the core systems that serve frontier models at scale ...
About the Role RadixArk is seeking a Member of Technical Staff - Inference to push the limits of large-scale AI inference. You will work on the core systems that serve frontier models at scale ...
AI Infra Resident (1-Year Program)
Palo Alto, CA · On-site
$116.40K - $148.70K/yr
About The Role RadixArk is launching a full-time, paid, 1-year residency program for aspiring AI infrastructure engineers. You'll rotate across inference, training, kernels, compilers, and cluster ...
AI Infra Resident (1-Year Program)
Palo Alto, CA · On-site
$116.40K - $148.70K/yr
About The Role RadixArk is launching a full-time, paid, 1-year residency program for aspiring AI infrastructure engineers. You'll rotate across inference, training, kernels, compilers, and cluster ...
About the Role We're looking for a Head of Business Development to build the BD function at RadixArk from the ground up. The BD team is the institutional memory of this company - maintaining active ...
About the Role We're looking for a Head of Business Development to build the BD function at RadixArk from the ground up. The BD team is the institutional memory of this company - maintaining active ...
Full Stack Engineer
Palo Alto, CA · On-site +1
About The Role RadixArk is building the infrastructure layer for frontier AI systems - unified inference, training, and evaluation stacks powering next-generation LLM applications at scale. Our ...
Full Stack Engineer
Palo Alto, CA · On-site +1
About The Role RadixArk is building the infrastructure layer for frontier AI systems - unified inference, training, and evaluation stacks powering next-generation LLM applications at scale. Our ...
About the Role RadixArk is seeking a Member of Technical Staff - Training to build and scale the systems that train frontier AI models. You will work on large-scale distributed training ...
About the Role RadixArk is seeking a Member of Technical Staff - Training to build and scale the systems that train frontier AI models. You will work on large-scale distributed training ...
About the Role RadixArk is hiring a Member of Technical Staff - CI Engineer to own the infrastructure that keeps SGLang moving. Our CI system runs 300+ GPU tests across NVIDIA, AMD, Intel, and Ascend ...
About the Role RadixArk is hiring a Member of Technical Staff - CI Engineer to own the infrastructure that keeps SGLang moving. Our CI system runs 300+ GPU tests across NVIDIA, AMD, Intel, and Ascend ...
RadixArk is seeking a Member of Technical Staff -- Training to build and scale the systems that train frontier AI models. The role involves working on large-scale distributed training infrastructure ...
RadixArk is seeking a Member of Technical Staff -- Training to build and scale the systems that train frontier AI models. The role involves working on large-scale distributed training infrastructure ...
About the Role We're looking for a Head of Business Development to build the BD function at RadixArk from the ground up. The BD team is the institutional memory of this company - maintaining active ...
About the Role We're looking for a Head of Business Development to build the BD function at RadixArk from the ground up. The BD team is the institutional memory of this company - maintaining active ...
About the Role RadixArk is looking for a Member of Technical Staff (Cluster / Platform) to architect and scale the core compute platform that powers frontier-level AI training and inference. You will ...
About the Role RadixArk is looking for a Member of Technical Staff (Cluster / Platform) to architect and scale the core compute platform that powers frontier-level AI training and inference. You will ...
About the Role RadixArk is looking for a Member of Technical Staff (Cluster / Platform) to architect and scale the core compute platform that powers frontier-level AI training and inference. You will ...
About the Role RadixArk is looking for a Member of Technical Staff (Cluster / Platform) to architect and scale the core compute platform that powers frontier-level AI training and inference. You will ...
About the Role RadixArk is seeking a Member of Technical Staff - Inference to push the limits of large-scale AI inference. You will work on the core systems that serve frontier models at scale ...
About the Role RadixArk is seeking a Member of Technical Staff - Inference to push the limits of large-scale AI inference. You will work on the core systems that serve frontier models at scale ...
Software Engineer, Product
Palo Alto, CA · On-site
About the Role RadixArk is seeking experienced product-focused engineers to join our team in building the developer-facing surfaces of our inference and training infrastructure. As a Software ...
Software Engineer, Product
Palo Alto, CA · On-site
About the Role RadixArk is seeking experienced product-focused engineers to join our team in building the developer-facing surfaces of our inference and training infrastructure. As a Software ...
Product Manager
Palo Alto, CA · On-site
About RadixArk RadixArk is an infrastructure-first company built by engineers who've shipped production AI systems, created SGLang (20K+ GitHub stars, the fastest open LLM serving engine), and ...
Product Manager
Palo Alto, CA · On-site
About RadixArk RadixArk is an infrastructure-first company built by engineers who've shipped production AI systems, created SGLang (20K+ GitHub stars, the fastest open LLM serving engine), and ...
Product Manager
Palo Alto, CA · On-site
RadixArk is an infrastructure-first company focused on democratizing AI infrastructure. They are seeking a Product Manager to define and drive the product roadmap for inference and training ...
Product Manager
Palo Alto, CA · On-site
RadixArk is an infrastructure-first company focused on democratizing AI infrastructure. They are seeking a Product Manager to define and drive the product roadmap for inference and training ...
Product Manager
Palo Alto, CA · On-site
About RadixArk RadixArk is an infrastructure-first company built by engineers who've shipped production AI systems, created SGLang (20K+ GitHub stars, the fastest open LLM serving engine), and ...
Product Manager
Palo Alto, CA · On-site
About RadixArk RadixArk is an infrastructure-first company built by engineers who've shipped production AI systems, created SGLang (20K+ GitHub stars, the fastest open LLM serving engine), and ...
RadixArk is seeking a Member of Technical Staff -- Diffusion Model to advance the frontier of generative modeling. You will work on cutting-edge diffusion and flow-based models for image, video, and ...
RadixArk is seeking a Member of Technical Staff -- Diffusion Model to advance the frontier of generative modeling. You will work on cutting-edge diffusion and flow-based models for image, video, and ...
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Full-time
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Job description
Job Summary:
RadixArk is an infrastructure-first company focused on building world-class open systems for AI inference and training. They are seeking a Performance Engineer to enhance the performance of their AI systems across various environments, ensuring optimal usability, affordability, and reliability in production.
Responsibilities:
• Analyze and improve performance across SGLang, Miles, and RadixArk production deployments
• Benchmark LLM inference and training workloads across GPUs, TPUs, and cloud environments
• Optimize latency, throughput, memory usage, batching, scheduling, routing, and GPU utilization
• Investigate performance regressions in real customer environments
• Work closely with kernel, runtime, distributed systems, and product engineers
• Build internal tooling for profiling, tracing, benchmarking, and regression detection
• Translate customer workload characteristics into concrete performance tuning strategies
• Help define performance metrics that matter commercially, including cost-per-token and serving efficiency
• Partner with customers and cloud partners on deep technical evaluations
• Contribute performance insights back to open-source SGLang and Miles
Qualifications:
Required:
• Strong systems engineering background, especially in performance-critical software
• Experience with GPU systems, distributed systems, inference serving, ML runtimes, or high-performance computing
• Familiarity with profiling tools, performance debugging, tracing, and benchmark methodology
• Comfort working with Python and C++
• Understanding of LLM inference concepts such as batching, KV cache, prefill/decode, speculative decoding, MoE, long context, and P99 latency
• Ability to debug messy real-world performance issues across software, hardware, and infrastructure layers
• Strong communication skills — you should be able to explain performance tradeoffs to both engineers and customers
Preferred:
• Experience with CUDA, Triton, Pallas, ROCm, XLA, or kernel-level optimization is a strong plus
• Prior experience with production AI infrastructure, cloud GPU environments, or open-source ML systems is a plus
Company:
RadixArk focuses on developing infrastructure for AI inference and training systems. Founded in 2025, the company is headquartered in San Francisco, USA, with a team of 11-50 employees. The company is currently Early Stage.
RadixArk is an infrastructure-first company focused on building world-class open systems for AI inference and training. They are seeking a Performance Engineer to enhance the performance of their AI systems across various environments, ensuring optimal usability, affordability, and reliability in production.
Responsibilities:
• Analyze and improve performance across SGLang, Miles, and RadixArk production deployments
• Benchmark LLM inference and training workloads across GPUs, TPUs, and cloud environments
• Optimize latency, throughput, memory usage, batching, scheduling, routing, and GPU utilization
• Investigate performance regressions in real customer environments
• Work closely with kernel, runtime, distributed systems, and product engineers
• Build internal tooling for profiling, tracing, benchmarking, and regression detection
• Translate customer workload characteristics into concrete performance tuning strategies
• Help define performance metrics that matter commercially, including cost-per-token and serving efficiency
• Partner with customers and cloud partners on deep technical evaluations
• Contribute performance insights back to open-source SGLang and Miles
Qualifications:
Required:
• Strong systems engineering background, especially in performance-critical software
• Experience with GPU systems, distributed systems, inference serving, ML runtimes, or high-performance computing
• Familiarity with profiling tools, performance debugging, tracing, and benchmark methodology
• Comfort working with Python and C++
• Understanding of LLM inference concepts such as batching, KV cache, prefill/decode, speculative decoding, MoE, long context, and P99 latency
• Ability to debug messy real-world performance issues across software, hardware, and infrastructure layers
• Strong communication skills — you should be able to explain performance tradeoffs to both engineers and customers
Preferred:
• Experience with CUDA, Triton, Pallas, ROCm, XLA, or kernel-level optimization is a strong plus
• Prior experience with production AI infrastructure, cloud GPU environments, or open-source ML systems is a plus
Company:
RadixArk focuses on developing infrastructure for AI inference and training systems. Founded in 2025, the company is headquartered in San Francisco, USA, with a team of 11-50 employees. The company is currently Early Stage.