Senior Firmware Engineer - User-Mode Driver Development

SanDisk India Device Design Centre Pvt.Ltd; Bengaluru; On-site; INR 4,000,000 - 7,000,000; Full time

Job summary

Sandisk is seeking a Staff Firmware Engineer to join our Bangalore team, contributing to host-side software for ML workloads on PCIe flash controllers. You will design and implement high-performance user-space driver frameworks, manage multi-card environments, and integrate tightly with kernel drivers via ioctl and mmap.

Strong C/C++ and memory management skills are essential. You will collaborate with firmware, hardware, and runtime teams to deliver scalable, end-to-end solutions, supporting

Qualifications

• 8+ years in system software or runtime development.
• Strong experience building user-space drivers, runtime libraries, or high-performance system software interacting with kernel interfaces (ioctl, mmap, eventfd).
• Deep understanding of PCIe and NVMe-like queue models, including submission/completion queues, descriptors, and asynchronous execution patterns.
• Mastery of C/C++ and memory management, concurrency, and virtual memory.
• Experience designing scalable APIs and abstractions for complex hardware/software systems.
• Exceptional debugging and analytical skills across user-space, kernel, and hardware boundaries.
• Bachelor’s or Master’s degree in Computer Science, Electrical Engineering, or a related field.

Responsibilities

• Architect and implement high-performance user-space driver libraries for Linux, with multi-device abstractions.
• Design PCIe device discovery, enumeration, and topology management across endpoints and cards.
• Develop a custom NVMe-like command and control protocol in user space including queues, orchestration, and events.
• Implement efficient user-kernel interface integration using ioctl, mmap, and event notifications.
• Collaborate with runtime, kernel driver, firmware, and hardware teams to deliver a cohesive, scalable solution.

Skills

C/C++

User-space drivers

kernel interfaces

PCIe/NVMe concepts

Memory management

Concurrency

API design

Education

Bachelor’s or Master’s degree in CS/EE

Tools

ioctl

mmap

eventfd

Job description

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.

Job Description

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.

Qualifications

Experience: 8+ years in system software or runtime development.

User-Space Systems Expertise: Strong experience building user-space drivers, runtime libraries, or high-performance system software interacting with kernel interfaces (ioctl, mmap, eventfd).

Protocol Knowledge: Deep understanding of PCIe and NVMe-like queue models, including submission/completion queues, descriptors, and asynchronous execution patterns.

Low-Level Proficiency: Mastery of C/C++ and strong understanding of memory management, concurrency, and virtual memory.

System Architecture: Experience designing scalable APIs and abstractions for complex hardware/software systems.

Problem-Solving: Exceptional debugging and analytical skills across user-space, kernel, and hardware boundaries.

Education: Bachelor’s or Master’s degree in Computer Science, Electrical Engineering, or a related field.

Additional Information

Sandisk thrives on the power and potential of diversity. As a global company, we believe the most effective way to embrace the diversity of our customers and communities is to mirror it from within. We believe the fusion of various perspectives results in the best outcomes for our employees, our company, our customers, and the world around us. We are committed to an inclusive environment where every individual can thrive through a sense of belonging, respect and contribution. Sandisk is committed to offering opportunities to applicants with disabilities and ensuring all candidates can successfully navigate our careers website and our hiring process. Please contact us at [e-mail] to advise us of your accommodation request. In your email, please include a description of the specific accommodation you are requesting as well as the job title and requisition number of the position for which you are applying.

Experience Level Senior Level