Software Engineer III

Overview

Design, develop and optimize userspace block devices on Linux, working close to the Linux kernel, io_uring and storage subsystems to build high-performance, reliable and scalable storage solutions.

What you'll do

• Design, develop and maintain UBLK-based userspace block devices on Linux
• Work with the 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, well-documented code
• Review code and contribute to design discussions and technical decisions
• Participate in performance benchmarking and regression analysis
• Guide and assist the QA group with creating and executing test cases
• Provide insight into system behaviour by analysing system logs and debugging software

What you'll need

• 8+ years of experience in software development with strong C programming
• Solid experience with Linux internals, including the 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 such as gdb, perf, strace, ftrace and 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

Nice to have

• Prior experience contributing to the 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
• Experience in performance tuning on production systems
• Scripting experience (Python, Bash)
• 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

Details

• Location: Pune Office