Staff Firmware Engineer

Sandisk understands how people and businesses consume data and we relentlessly innovate to deliver solutions that enable today’s needs and tomorrow’s next big ideas. With a rich history of groundbreaking innovations in Flash and advanced memory technologies, our solutions have become the beating heart of the digital world we’re living in and that we have the power to shape.

Sandisk meets people and businesses at the intersection of their aspirations and the moment, enabling them to keep moving and pushing possibility forward. We do this through the balance of our powerhouse manufacturing capabilities and our industry-leading portfolio of products that are recognized globally for innovation, performance and quality.

Sandisk has two facilities recognized by the World Economic Forum as part of the Global Lighthouse Network for advanced 4IR innovations. These facilities were also recognized as Sustainability Lighthouses for breakthroughs in efficient operations. With our global reach, we ensure the global supply chain has access to the Flash memory it needs to keep our world moving forward.

We are seeking a talented and driven User-Mode Driver (UMD) / system software engineer to join our team and contribute to the host-side software stack for machine learning in the Next Gen Computational PCIe Flash Controller project. In this role, you will be responsible for building high-performance user-space driver frameworks and runtime interfaces that enable efficient communication and data flow between applications and our device via the kernel driver. You will work on key components including user-space APIs, command queues, memory orchestration, and multi-device management to enable scalable ML workloads.

• User-Mode Driver Development: Architect and implement high-performance user-space driver libraries for Linux. This includes designing scalable abstractions for multi-device and multi-card systems, and enabling efficient interaction with PCIe devices through kernel interfaces.
• Device Discovery & Topology Management: Design and implement mechanisms for PCIe device discovery, enumeration, and logical grouping across multiple endpoints and cards. Develop topology-aware abstractions for managing devices in complex multi-card and switched environments.
• Custom Protocol Design: Design and implement a custom, NVMe-like command and control protocol in user space. You'll be responsible for the host-side orchestration, including:
• Command Queues: Manage submission and completion queue abstractions and request tracking
• Command Orchestration: Implement tag-based request management, async/sync execution, and callback handling
• Event Handling: Design event-driven completion handling using poll/eventfd mechanisms
• User ↔ Kernel Interface Integration: Develop efficient interaction with the kernel driver using ioctl, mmap, and event mechanisms. Translate high-level runtime requests into kernel-mediated operations while maintaining performance and isolation.
• Memory & Dataflow Management: Design user-space data movement strategies, including DMA buffer lifecycle management, memory pinning workflows, and zero-copy data paths for efficient host-device communication.
• Multi-Application Support: Enable concurrent multi-process access to devices using per-file descriptor resource management, ensuring isolation, scalability, and robustness across workloads.
• Collaboration: Work closely with runtime, kernel driver, firmware, and hardware teams to define clean interfaces and deliver a cohesive, high-performance end-to-end solution.

• 8+ years in system software or runtime development.
• User-Space Systems Ex...