Senior Software Engineer (YDB Team)

Location: Remote - Europe (Germany, Netherlands, Prague, United Kingdom).

Company

Nebius is leading a new era in cloud computing to serve the global AI economy, creating tools for real-world challenges and transforming industries without massive infrastructure costs.

What you will do

• Adapt YDB to leverage modern hardware, including QLC NVMe drives, Dual 800Gb/s network adapters, and BlueField DPUs.
• Maximize performance on widely used devices such as HDDs and TLC NVMe.
• Reengineer YDB components with more efficient algorithms to solve complex system challenges.

Requirements

• 5+ years of experience in C/C++ programming for highly loaded systems.
• Hands-on experience with debugging and profiling tools like perf, VTune, bpftrace, and gdb, with an understanding of core dumps, flamegraphs, and sanitized builds.
• Experience developing high-performance, low-latency components, including an understanding of CPU caches, modern CPU atomic operations, and NUMA architectures.

Nice to have

• Experience with on-disk data structures (LSM trees, B+ trees).
• Knowledge of storage-related algorithms (erasure coding, checksumming) and understanding of storage device internals (NVMe, HDD).
• Familiarity with Linux kernel, SPDK/DPDK, libaio, io_uring.
• Knowledge of networking concepts and protocols (IP, TCP, UDP, DNS, InfiniBand, RoCE/RDMA).
• Experience with Kubernetes and Grafana.
• Track record of active participation in incident resolution and experience designing production-grade distributed storage components.

Culture & Benefits

• Competitive salary and comprehensive benefits package.
• Opportunities for professional growth within Nebius at the cutting edge of AI cloud infrastructure.
• Flexible working arrangements.
• A dynamic and collaborative work environment that values initiative and innovation.

Hiring process

• Coding interviews are part of the process.