Job Summary : We are looking for a skilled Software Engineer III to design, develop, and optimize userspace block devices on Linux. The role involves working close to the Linux kernel, io_uring, and storage subsystems to build high‑performance, reliable, and scalable storage solutions. Roles and Responsibilities: - Design, develop, and maintain UBLK-based userspace block devices on Linux - Work with Linux block layer, io_uring, and kernel interfaces - Implement high‑performance I/O paths with low latency and high throughput - Debug and resolve issues across user space and kernel space - Optimize storage performance, memory usage, and CPU utilization - Collaborate with kernel, platform, and application teams on storage architecture - Write clean, maintainable, and well-documented code - Review code and contribute to design discussions and technical decisions - Participate in performance benchmarking and regression analysis - Guide and assist QA group with creating & executing the test cases. - Provide insight into the system behaviour by analysing system logs & debugging software Skills: · Software development with strong C programming.
Candidate should have 8+years of experience. · Solid experience with Linux internals - Good understanding of: - Linux block device subsystem - io_uring - System calls, memory management, and concurrency - Experience with userspace–kernel interaction (netlink, ioctl, sysfs, etc.) - Strong debugging skills using tools like: - gdb, perf, strace, ftrace, bpf - Experience working in multithreaded and high‑performance environments - Familiarity with POSIX APIs and low‑level I/O mechanisms - Good understanding of data structures and algorithms - Hands-on experience with UBLK, SPDK or other storage frameworks · Development experience in high availability clustering solutions required. - Prior experience contributing to Linux kernel or storage-related open source - Knowledge of file systems (ext4, xfs, btrfs, etc.) - Experience with virtualization or container storage (KVM, Docker, Kubernetes CSI) - Working experience with RDMA, NVMe, NVMe-oF preferred - Experience in performance tuning on production systems - Scripting experience (Python, Bash) preferred - Strong problem-solving and analytical skills - Ability to work independently on complex system-level problems - Good communication skills for cross-team collaboration - Passion for low-level systems and performance engineering
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