AI Compiler and Performance Engineer @ ElastixAI INC.

AI Compiler and Performance Engineer @ ElastixAI INC. !ElastixAI INC.(https://app.ashbyhq.com/api/images/org-theme-wordmark/026d3a78-2bf0-4fb6-9db7-6dbd0924a606/07286fef-bed3-4465-a79e-302068e3048d/a1cc810a-f11a-4a64-8039-a9e552db2916.png)(https://elastix.ai) (https://jobs.ashbyhq.com/elastix) AI Compiler and Performance Engineer Location Seattle Employment Type Full time Location Type Hybrid Department Engineering Description Job Title: Software Engineer, AI Inference Platform Company: ElastixAI, Inc. Location: Seattle, WA (Hybrid - 3 days/week in office) About ElastixAI ElastixAI is an early-stage startup on a mission to reinvent AI inference infrastructure from the ground up. We’re building a next-generation inference platform that delivers unprecedented efficiency by tightly integrating machine learning, software stack, and custom hardware. Our philosophy is simple: the best performance comes from holistic co-design, where every layer, from model architecture to kernels to silicon, works in harmony. If you’re excited about pushing AI performance to physical limits, and about shaping the future of large-scale inference, we’d love to meet you. Role Summary We are looking for a deeply technical AI Compiler & Performance Engineer who thrives at the intersection of ML, compilers, and hardware. In this role, you will design how LLM operations decompose into highly efficient proprietary kernel primitives, optimize execution pipelines, and co-develop abstractions with our hardware and ML teams. This is not a “typical” compiler role, it’s a chance to rethink the entire AI compute stack. At ElastixAI, if improving inference efficiency requires inventing new quantization schemes, rethinking graph-level optimizations, or modifying the hardware ISA, we do it. You’ll have end-to-end ownership to explore radically new ideas and make them real. Key Responsibilities Break down LLM and transformer workloa