Member of Technical Staff — Kernel / Compiler / Communication

RadixArk is an infrastructure-first company focused on democratizing frontier-level AI infrastructure. They are seeking a Member of Technical Staff to enhance performance for AI systems by working on kernels, runtimes, compilers, and communication libraries.

Responsibilities:

• Design and implement high-performance kernels for AI workloads
• Optimize compiler and runtime stacks for ML systems
• Improve communication efficiency across large GPU clusters
• Reduce latency and increase throughput for distributed workloads
• Profile and eliminate system bottlenecks across the stack
• Collaborate with training and inference teams on performance optimization
• Develop tooling for profiling and performance analysis
• Contribute to long-term architecture for performance-critical systems
• Push the limits of hardware–software co-design