Staff / Senior Software Engineer (Agentic Search) - Index

About the role

Nebius is seeking a Senior Software Engineer to develop the indexing and data processing layer for an agent-native search platform. You will build systems to ingest and organize massive volumes of data into efficient, queryable structures for AI agents. The role focuses on offline and nearline pipelines that prioritize throughput, scalability, and correctness.

Responsibilities

• Design, implement, and operate large-scale indexing systems and data pipelines that sit 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 remaining flexible as the system evolves
• Define and implement observability primitives, including structured logs, metrics, and data quality signals across offline and nearline pipelines
• Monitor throughput, resource usage, and cost, and drive optimisations when business needs require it
• 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 clearly defined quality signals

Required skills

• Go
• Distributed systems
• Data infrastructure
• Indexing pipelines
• Storage systems
• Data processing

Nice to have

• C++
• Rust
• Spark
• Flink
• MapReduce
• Beam
• DBMS internals

Benefits

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

About the Company

Nebius is a full-stack AI cloud platform supporting developers and enterprises from data and model training through to production deployment. Headquartered in Amsterdam and listed on Nasdaq, the company maintains a global footprint with R&D hubs across Europe, the UK, North America, and Israel.