Senior Software Engineer (YDB Team)

Nebius·Londonsenior

In short

→Ingeniero de software senior que mejora YDB, un sistema de almacenamiento y base de datos distribuida para IA.
→Día a día: optimizar rendimiento en hardware moderno (NVMe, DPUs, redes 800Gb/s) usando C++.
→Destacado: trabajar en una infraestructura de nube AI de vanguardia con impacto real en entrenamiento y despliegue de modelos.

Strong written and spoken English required.

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The questions they'll ask you

1. ¿Cómo optimizarías un acceso a disco en YDB para reducir latencia en NVMe QLC?

🔒 +7 more questions

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💵 USD · Remote · No visa

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What they ask for

✓5+ años en C/C++ para sistemas de alta carga
✓Comprensión de core dumps, flamegraphs y builds sanitizados
✓Experiencia en componentes de alto rendimiento y baja latencia
✓Conocimiento de cachés de CPU, operaciones atómicas modernas y arquitectura NUMA
✓Capacidad para reingeniería de componentes con algoritmos eficientes
✓Experiencia en sistemas distribuidos y almacenamiento de producción

Don't tick every box? That's normal — your free dossier shows your gaps and how to cover them in the interview.

C++QLC NVMeDual 800Gb/s network adaptersBlueField DPUsHDDTLC NVMeLSM treesB+ treesperfVTune

Who should you write to at Nebius?

Your free dossier identifies the people who'd interview you — their background, what they value, and how to reach out so you stand out before applying.

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 role #LI-MM1 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 ownership • 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 wo

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