Senior Embedded Software Engineer

Title: Sr. Embedded Software Engineer (L2 NIC Driver Developer) - (Linux)

Location: Bengaluru, Karnataka (South Bangalore)

Position Overview:

We are seeking a highly skilled L2 (Layer 2) NIC Driver Developer with expertise in Linux

kernel programming to join our team. The ideal candidate will design, develop, optimize, and maintain high-performance network interface card (NIC) drivers at Layer 2 for Linux-based systems. Experience with Windows NIC driver development is a plus. You will work closely with hardware and software teams to ensure seamless integration, performance optimization, and robust functionality.

Key Responsibilities:

Driver Development:

• Design and implement L2 NIC drivers for Linux, ensuring compatibility with the latest kernel versions and distributions.
• Develop drivers that meet performance, stability, and scalability requirements.
• Maintain compliance with standards like IEEE 802.3 and other Ethernet-related specifications.

Performance Optimization:

• Optimize NIC drivers for low-latency, high-throughput networking applications.
• Implement advanced features such as interrupt moderation, Receive Side Scaling (RSS), Generic Receive Offload (GRO), and TCP Segmentation Offload (TSO).
• Testing and Debugging:
• Write and maintain test cases for NIC drivers, including stress tests and regression
• tests.
• Debug kernel and user-space issues related to the NIC driver using tools like gdb, ftrace, and perf.

Qualifications:

Technical Skills:

• Strong experience in Linux kernel programming, especially in the area of network drivers.
• Deep understanding of Layer 2 networking concepts, including Ethernet, VLAN tagging (802.1Q), and link aggregation (802.3ad).
• Proficiency in C programming and familiarity with debugging tools like kgdb, valgrind, and Wireshark.
• Knowledge of DMA, PCI/PCIe, and memory-mapped I/O (MMIO) interactions between NICs and the system.
• Experience with Linux networking subsystems (e.g., ethtool, netdev, and skb structures).

Optional but Preferred Skills:

• Experience with DPDK, eBPF, or other high-performance packet processing
• frameworks.
• Knowledge of SR-IOV, RDMA, or hardware offloading features.
• Hands-on experience with NIC driver development for Windows (e.g., NDIS drivers).

Nice to Have:

• Contributions to open-source projects, particularly in the Linux kernel networking Nstack.
• Familiarity with virtualization technologies like KVM, Xen, or VMware, and virtual NICs (vNICs).
• Experience with NIC hardware testing tools or simulation environments.