The role
As Senior AI Kernel Optimization Engineer, you will lead the optimization of high-performance kernels to push the limits of AI Inference on Openchip RISC-V platforms.
You will design, implement, and optimize AI compute kernels (Gen AI Large Language Model, AI Vision, CNNs, etc) and runtime components to fully exploit the underlying hardware architecture — from vector/matrix units and memory hierarchies down to the assembly level.
Your work will directly influence how efficiently AI models run on Openchip SoCs, shaping the performance of next-generation inference accelerators. You will collaborate closely with hardware architects, compiler engineers, and AI framework developers to achieve optimal hardware–software co-design.
Key responsibilities
Drive the development, optimization, profiling of AI compute-intensive kernels (e.g., GEMM, attention, activations) targeting Openchip RISC-V architectures.
Identify and resolve performance bottlenecks at the ISA, compiler, and runtime levels.
Collaborate with the hardware and architecture teams to guide design decisions that improve real-world performance.
Give orientation for the development and tuning of AI runtime and graph execution engines.
Implement performance analysis tools and scripts to automate profiling and validation.
Work with AI frameworks (e.g. vLLM, PyTorch, ONNX Runtime, TensorRT, TVM) to ensure efficient mapping to Openchip targets.
Stay up to date on AI kernel optimization trends, emerging hardware acceleration techniques, and open-source contributions.
Review and mentor other AI Kernel Optimization Engineer in the team.
Required qualifications
MSc or PhD in Computer Engineering or Computer Science, or equivalent practical experience.
7+ years of experience in performance optimization for AI Inference (or HPC use cases).
Technical skills
Strong background in low-level performance optimization (vectorization, memory access optimization, loop unrolling, instruction scheduling, data-tiling, etc.).
Proficiency in C/C++ and good understanding of assembly-level optimizations (SIMD, intrinsics, compiler flags).
Solid understanding of CPU/GPU/AI accelerator architecture (pipelines, caches, memory hierarchies, compute units).
Experience with RISC-V architectures or other custom ISAs.
Experience with profiling and performance analysis tools (perf, VTune, nvprof, etc.).
Strong knowledge of parallel programming (SIMD, multithreading, OpenMP, CUDA, or similar).
Solid software engineering skills (version control, CI/CD, testing).
Nice to have
Experience with AI inference workloads or libraries (e.g. BLIS, cuDNN, oneDNN, TVM, or similar).
Familiarity with MLIR/LLVM or other compiler infrastructures.
Contributions to open-source AI inference engines or kernel libraries.
Understanding of chiplet-based architecture or heterogeneous computing, (e.g. NUMA)
Experience with quantization and mixed precision inference.
Soft Skills
Passion for performance and detail-oriented mindset.
Strong analytical and problem-solving abilities.
Leadership, collaborative, and open to cross-disciplinary work.
Comfortable working in an international, fast-evolving startup environment.
What we offer
Contract: Permanent contract (CDI)
Start date: Q2 2026
Location: Montbonnot-Saint-Martin (near Grenoble)
Remote policy: Up to 2 days per week remote work possible
Benefits: Meal vouchers, Premium health coverage, Sustainable mobility incentives, Generous paternity leave, etc.
We offer a remuneration package that values your experience
We believe in investing in our employees and providing them with opportunities for growth and career development.
Join an innovative team and experience company growth.
A chance to work at one of the most transformative AI and silicon engineering companies in Europe.
Opportunity to travel to other countries in Europe to meet the teams, collaborate and drive solutions
We are looking for outstanding people willing to join our mission to change the silicon industry and help build
a better world. If you identify with Openchip, please contact us.
At Openchip & Software Technologies S.L., we believe a diverse and inclusive team is the key to groundbreaking
ideas. We foster a work environment where everyone feels valued, respected, and empowered to reach their full
potential - regardless of race, gender, ethnicity, sexual orientation, or gender identity.
Openchip is a European company that develops and produces powerful and efficient accelerators. These devices are essential for the digital transformation of Europe, as they enable faster and better scientific research, data visualization, and intelligent services. Openchip's accelerators can be integrated into various devices to provide smart solutions for consumer’s at large scale.
Openchip is a company that designs accelerator chips for HPC, AI/ML/DL. These accelerators are designed with silicon technology nodes and under the RISC-V architecture, to be globally competitive and achieve digital sovereignty in the HPC domain.
The European Commission has recognized Openchip as an Important Project of Common European Interest, which means that it will support its research, innovation, and industrial deployment in the fields of microelectronics and communications technologies. This project aims to strengthen the European value chain in these strategic sectors and to foster collaboration among different actors across the continent.
The Spanish State has launched a Recovery, Transformation and Resilience Plan to cope with the challenges of the current situation. This plan counts on the collaboration of all levels of government and aims to boost the economy, modernize the public sector and strengthen social cohesion.
