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 solid 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.)
• Expe
📌 Software Engineer III (Pune)
🏢 DDN
📍 Pune