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