Software Engineer III

DDN · India · FullTime · On site · 4 days ago

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Posted October 15, 2026 · Read from DDN
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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 subsystemio_uringSystem 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
Employer
DDN
Location
India · On site
Contract
FullTime