Senior Software Engineer (YDB Team)

Nebius is building a full-stack AI cloud platform for the global AI economy. The YDB Development Team at Nebius is looking for Mid and Senior Software Developers with strong expertise in C++ to build YDB, a distributed relational database and object storage foundation. The role involves adapting YDB to leverage modern hardware and maximizing performance on widely used storage devices.

• Adapt YDB to leverage modern hardware to its fullest potential: QLC NVMe drives, Dual 800Gb/s network adapters, 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

• 5+ years of experience in C/C++ programming for highly loaded systems
• Understanding of core dumps, flamegraphs, and sanitized builds
• Experience developing high-performance, low-latency components
• Understanding of CPU caches, Modern CPU atomic operations and NUMA architectures
• Experience with on-disk data structures (LSM trees, B+ trees)
• Hands-on experience with debugging and profiling tools such as perf, VTune, bpftrace, gdb
• Knowledge of storage-related algorithms (erasure coding, checksumming)
• 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, ideally InfiniBand, RoCE/RDMA)
• Experience with Kubernetes and Grafana
• Track record of active participation in incident resolution
• Experience designing production-grade distributed storage components
• Knowledge of availability and durability calculations

• Competitive compensation
• Career growth and learning opportunities
• Flexibility and ownership
• Collaborative and innovative culture
• Opportunity to work on impactful AI projects
• International environment and talented teams