Responsibilities
- Optimize Linux storage components across block I/O, file systems, NVMe, device drivers, caching, and user-space services.
- Diagnose failures across devices, PCIe, firmware, kernels, memory, networking, runtimes, and applications through verified root-cause resolution.
- Use benchmarks, tracing, profiling, telemetry, logs, and hardware counters to identify performance and scalability bottlenecks.
- Improve reliability through fault detection, isolation, retry, timeout, reset, failover, recovery, regression detection, and graceful degradation.
- Own storage features from requirements and architecture through coding, integration, qualification, rollout, and sustained support.
- Create automated correctness, performance, endurance, stress, fault-injection, and compatibility tests.
- Collaborate with device, firmware, kernel, server, network, validation, production, and workload teams.
- Review designs and code, document performance and recovery behavior, and contribute upstream where appropriate.
Requirements
- Bachelor’s degree in Computer Science, Computer Engineering, Electrical Engineering, or equivalent practical experience.
- 3+ years of professional experience in C or C++ systems programming on Linux.
- Deep understanding of the Linux I/O path and hands-on experience in at least two relevant areas, including NVMe, HDD, SATA SSD, AHCI, HBA, RAID, block layer, file systems, device drivers, memory management, caching, or I/O scheduling.
- Experience analyzing storage performance with reproducible benchmarks, tracing tools, telemetry, and statistically sound comparisons.
- Demonstrated ability to debug production failures across kernel, firmware, device, and service boundaries.
- Experience delivering well-tested software with hardware, validation, and production teams.
- Preferred experience with high-performance or distributed storage for data-center, cloud, high-performance computing, database, or AI workloads.
- Preferred knowledge of PCIe, NVMe over Fabrics, direct I/O, asynchronous I/O, DMA, NUMA, persistent memory, or GPU-direct storage paths.
- Preferred experience contributing to upstream Linux storage or file-system communities.
- Evidence of measurable improvements in tail latency, throughput, recovery time, device utilization, or fleet reliability is preferred.
About ByteDance
ByteDance is a global incubator of platforms at the cutting edge of commerce, content, entertainment and enterprise services - over 2.5bn people interact with ByteDance products including TikTok. Creation is the core of ByteDance's purpose. Our products are built to help imaginations thrive. This is doubly true of the teams that make our innovations possible. Together, we inspire creativity and enrich life - a mission we aim towards achieving every day. At ByteDance, we create together and grow together. That's how we drive impact - for ourselves, our company, and the users we serve. We are committed to building a safe, healthy and positive online environment for all our users. We have over 110,000 employees based in more than 30 countries globally. Join us.