Senior Software Engineer, AI Search & Data Infra

Nebius; Greater London; On-site; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Competitive compensation

Career growth and learning

Flexibility and ownership

Collaborative culture

Impactful AI projects

International environment

Job summary

Nebius is seeking a Senior Software Engineer to join our indexing and data processing team, building a scalable search platform for AI workloads. You will ingest, process, and organize massive data volumes, focusing on offline and nearline pipelines with emphasis on throughput and correctness.

You will shape indexing strategies, storage formats, and observability, collaborating with runtime and ML teams to meet retrieval needs. A strong background in Go and large-scale data systems is essential.

Qualifications

• 5+ years of experience building production backend or data infrastructure systems.
• Strong Go experience (C++/Rust is a plus)
• Experience with large-scale data processing systems (10+ GiB/sec throughput, petabyte-scale datasets)
• Experience building or operating databases, storage systems, data planes, or indexing pipelines; strong understanding of distributed systems, fault tolerance, consistency, and scalability

Responsibilities

• Design, implement, and operate large-scale indexing systems and data pipelines at the core of our search infrastructure.
• Develop and optimise indexing strategies balancing performance, freshness, and resource efficiency.
• Work on storage formats, compaction strategies, and update mechanisms to keep data accessible and current.
• Ensure reliability and predictability of pipelines under high-throughput conditions.
• Build well-tested components with clear responsibilities and interaction contracts, while evolving the system.
• Define observability primitives, including structured logs, metrics, and data quality signals across pipelines.
• Monitor throughput, resource usage, and cost, and drive optimisations as needed.
• Collaborate with runtime and ML teams to ensure indexing outputs meet retrieval and ranking requirements.
• Enable safe experimentation on indexing strategies and data processing logic through controlled rollouts and quality signals

Skills

Go

Distributed systems

Data processing

Backend

Tools

Spark

Flink

MapReduce

Beam

Job description

Nebius is seeking a Senior Software Engineer to join our indexing and data processing team, building a scalable search platform for AI workloads. You will ingest, process, and organize massive data volumes, focusing on offline and nearline pipelines with emphasis on throughput and correctness.

You will shape indexing strategies, storage formats, and observability, collaborating with runtime and ML teams to meet retrieval needs. A strong background in Go and large-scale data systems is essential.