Software Engineer III

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