Senior Software Engineer - AI Compiler & Runtime Infrastructure

Senior Software Engineer – AI Compiler & Runtime Infrastructure Irvine, CA or San Jose, CA — On-site (Hybrid preferred) About Xcelerium Xcelerium is a venture-backed fabless semiconductor company building the next generation of autonomous compute silicon optimized for real-time, physical AI. We develop high-performance processors and software that enable deterministic, low-latency execution for converged sensing, communications, and AI tasks — addressing limitations of conventional CPU, GPU, and FPGA architectures. Our technology powers advanced radar, wireless communications, sensor processing, and machine-learning workloads across applications including aerospace & defense, robotics, autonomous systems, and next-generation wireless infrastructure. At Xcelerium, software innovation — from compilers and runtimes to schedulers and microkernel development — is essential to unlocking the performance and efficiency of our hardware. Role Summary We are looking for a hands-on, experienced engineer to lead development of our AI compiler stack and runtime infrastructure . You will help architect, implement, and optimize compiler passes, schedulers, and runtime systems that translate high-level programs into high-performance code for our custom hardware. This role is a perfect fit for engineers who thrive on systems-level challenges — including compiler internals, runtime design, optimization, and tooling — and want to make a direct impact on how tomorrow's real-time systems are built. What You'll Do Technical Responsibilities Design and implement core compiler components (IR transformations, optimization passes, backend codegen). Build and optimize runtime systems, including task schedulers, resource managers, and execution engines. Collaborate closely with hardware architects to define ABI, scheduling strategies, and performance targets. Diagnose performance issues using profiling and benchmarking tools; propose and implement improvements. Take ownership of features end-to-end — from design through validation and documentation. Influence long-term compiler and runtime architecture. Lead design reviews and technical discussions. Mentor and guide other engineers on best practices in systems programming and compiler design. Who You Are Required Experience 7+ years of software engineering experience with significant work in compilers and/or runtime systems. Expert in C/C++ (Python for tooling and automation a plus). Deep understanding of compiler internals (IR, passes, optimizations, codegen). Proven ability to ship production-quality systems software with measurable impact. Preferred Hands-on experience with MLIR, IREE, LLVM , or similar compiler frameworks. Experience designing schedulers and execution systems for accelerators. Familiarity with profiling tools and performance analysis. OSS contributions or publications in relevant areas. Salary & Benefits Salary Range: $190,000–$260,000 + equity (DOE) We believe in transparency and aligning compensation with market expectations for senior engineers in specialized systems roles. Equity & Stock Options We offer generous stock option grants — giving you real ownership and upside in the company's success. Additional Benefits Comprehensive medical, dental, and vision coverage 401(k) plan Paid time off (PTO) Why Join Us At Xcelerium, you'll work on core software components that directly enable the performance and efficiency of our hardware. You'll be part of a team solving complex systems challenges at the intersection of software and silicon — making a real impact in mission-critical domains. Apply now to help shape the future of real-time, edge computing infrastructure. J-18808-Ljbffr