Position Overview
The Sr. Memory & Storage Architect will own detailed design of the tiered CXL 3.1–class memory subsystem that underpins the next-generation key-value platform. This role defines memory pool architectures, designs Near-Data Processing logic for in-memory KV-cache operations, and partners with system software engineers to expose these capabilities through extended inference runtimes.
Key Responsibilities
▸ Design CXL 3.1–generation Type-2 and Type-3 tiered memory pool architectures supporting hot KV-cache in high-bandwidth memory and cold KV offloaded to DDR5 via intelligent tiering logic.
▸ Architect Near-Data Processing (NDP) engines co-located with CXL memory for attention score computation, KV compression/decompression, and vector operations to minimize CPU round-trips.
▸ Define memory controller microarchitecture, including arbitration policy, prefetching strategies, ECC, and inline encryption for KV-cache at rest.
▸ Build detailed memory subsystem performance models and validate against LLM inference benchmarks (e.g., TTFT, throughput, memory utilization).
▸ Partner with system software teams to surface NDP capabilities via CXL.mem and define software interfaces for block-level KV-cache offloading.
▸ Evaluate DDR5 DIMM and CXL memory expander vendors; define qualification criteria and design-in requirements.
▸ Develop storage-class memory integration strategies for long-term context persistence beyond DRAM capacity limits.
▸ Contribute to IP filings for novel memory architecture innovations.
Required Skills & Experience
▸ 10+ years in memory subsystem architecture with deep DDR5/LPDDR5x expertise and at least one CXL-based product or research prototype.
▸ Expert-level knowledge of CXL 2.0/3.0/3.1 specifications: device models, CXL.io / CXL.cache / CXL.mem protocols, fabric switching, and coherency semantics.
▸ Demonstrated NDP or PIM design experience (or equivalent academic/industry research on processing-near-memory architectures).
▸ Strong analytical ability to build cycle-accurate or analytical memory models and correlate them with silicon measurements.
▸ Familiarity with LLM inference memory access patterns, including KV-cache management and modern attention/paging techniques.
▸ Proficiency with EDA tools for verification of memory IP blocks and RTL-level understanding of memory controller design.
Preferred Qualifications
▸ Prior experience at leading memory vendors or companies in the CXL ecosystem.
▸ Publications or patents in NDP, PIM, or disaggregated memory architecture.
▸ Understanding of open-source memory simulation tools (such as DRAMsim3 or Ramulator) and emerging interconnect standards for memory-centric systems.
Sr. Memory & Storage Architect • California, California, US
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