Senior Software Engineer

The YDB Development Team at Nebius is looking for Mid and Senior Software Developer with a strong expertise in C++.

YDB is an open-source product that serves two main purposes within Nebius: A scalable and reliable binary object storage foundation powering S3 Object Storage, Filestore, Network Block Storage Tailored to process AI- related Workloads A distributed relational database and message broker supporting Nebius cloud operations such as IAM, Billing, Audit Trails and Logging

How You Will Change the World with Us Adapt YDB to leverage modern hardware to its fullest potential: QLC NVMe drives, Dual 800

Gb/s network adapters, Blue Field 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

We conduct coding interviews as part of the process.

• 5+ years of experience in C/C++ programming for highly loaded systems
• Understanding of core dumps, flame graphs, and sanitized builds
• Experience developing high-performance, low-latency components
• Understanding of CPU caches, Modern CPU atomic operations and NUMA architectures
• Nice to Have 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,
• Knowledge of networking concepts and protocols (IP, TCP, UDP, DNS, ideally Infini Band, 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

• Fast moving
• Bold thinking
• Constant growth
• Meaningful impact
• Trust and real ownership
• Opportunity to shape the future of AI

Nebius is an equal opportunity employer. We are committed to fostering an inclusive and diverse workplace and to providing equal employment opportunities in all aspects of employment. We do not discriminate on the basis of race, color, religion, sex (including pregnancy), national origin, ancestry, age, disability, genetic information, marital status, veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by applicable law.

Applicants must be authorized to work in the country in which they apply and will be required to provide proof of employment eligibility as a condition of hire. If you need accommodations during the application process, please let us know.

5+ years of C/C++ experience, Experience with high-performance, low-latency components, Familiarity with Linux kernel and networking concepts, Experience with debugging and profiling tools (perf, VTune, gdb)