Senior Software Engineer (YDB Team)

About Nebius

Nebius is leading a new era in cloud infrastructure for the global AI economy. We are building a full-stack AI cloud platform that supports developers and enterprises from data and model training through to production deployment, without the cost and complexity of building large in-house AI/ML infrastructure.

Built by engineers, for engineers. From large-scale GPU orchestration to inference optimization, we own the hard problems across compute, storage, networking and applied AI.

Listed on Nasdaq (NBIS) and headquartered in Amsterdam, we have a global footprint with R&D hubs across Europe, the UK, North America and Israel. Our team of 1,500+ includes hundreds of engineers with deep expertise across hardware, software and AI R&D.

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 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

Requirements

• 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

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, 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

We conduct coding interviews as part of the process.

Benefits & Perks

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

What's it like to work at Nebius: Fast moving - Bold thinking - Constant growth - Meaningful impact - Trust and real ownership - Opportunity to shape the future of AI

Equal Opportunity Statement: Nebius is an equal opportunity employer. We are committed to fostering an inclusive and diverse workplace.