RLEE - Low-Level Engineering & Kernel Inference Optimization

RLEE - Low-Level Engineering & Kernel Inference OptimizationRL Environments Kernel Optimization GPU/CUDA Compilers (LLVM/MLIR) PyTorch Extensions Distributed Inference (vLLM/NCCL)Brief Description of the RoleWe're hiring Low-Level Engineers to design and build RL environments that teach LLMs kernel development, hardware optimization, and systems programming. The goal is to create realistic feedback loops where models learn to write high-performance code across GPU and CPU architectures.This is a remote contractor role with =4 hours overlap to PST and advanced English (C1/C2) required.About the CompanyPreference Model is building the next generation of training data to power the future of AI. Today's models are powerful but fail to reach their potential across diverse use cases because so many of the tasks that we want to use these models are out of distribution. Preference Model creates RL environments where models encounter research and engineering problems, iterate, and learn from realistic feedback loops.Our founding team has previous experience on Anthropic's data team building data infrastructure, tokenizers, and datasets behind the Claude model. We are partnering with leading AI labs to push AI closer to achieving its transformative potential.The company is backed by Tier 1 Silicon Valley VC.ResponsibilitiesDesign and build MLE/SWE environments and diverse tasks.Target a specified language model and satisfy the required difficulty distribution.RequirementsMinimal QualificationsStrong Python (engineering-quality, not notebook-only)Clear understanding of LLMs, their current limitationsAbility to meet throughput expectations and respond quickly to feedbackYou may be a good fit if one of the following appliesDeep understanding of memory hierarchies (registers, L1/L2/shared memory, HBM, system RAM) and their performance implicationsThreading models, synchronization primitives, and concurrent programming (warps, thread blocks, barriers, atomics)Cache coherence, memory access patterns, coalescing, and bank conflictsAOT compilation and optimization passes (LLVM, MLIR, TVM)Compiler and kernel frameworks such as CUTLASS, BitBLAS, or JAX/PallasModern C++, including templates, concurrency, and build systemsAssembly-level programming and low-level optimization across GPU and CPU architectures (e.g., x86, ARM, NVIDIA Hopper, NVIDIA Blackwell)Debugging and optimizing GPU kernels using CUDA and/or HIP/ROCmDeveloping PyTorch custom operators, backend extensions, or dispatcher integrations (e.g., ATen, TorchScript, or custom backends)Customizing, extending, or optimizing vLLM, including distributed inference workflowsGPU communication libraries and collectives, such as NVIDIA NCCL, AMD RCCL, MPI, or UCXMixed-precision and low-precision kernels (e.g., FP16, BF16, FP8, INT8), including numerical stability and performance trade-offsWorking conditionsHourly contractor rate: 90- 125 USD/hour (dependent on the expertise level and quality of take-home assignment).ContactsLog In Only registered users can open employer contacts.J-18808-Ljbffr