Staff Applied AI Researcher - Agentic Search Systems

Nebius Group; Amsterdam; On-site; EUR 140,000 - 190,000; Full time

Benefits offered by this job

Competitive compensation

Career growth and learning

Flexibility and ownership

Collaborative and innovative culture

Impactful AI projects

International environment

Job summary

Nebius, a leader in cloud AI infrastructure delivering an agent-native search platform, seeks a Staff Applied AI Researcher to own retrieval and ranking work at scale in Amsterdam.

You will design multi-stage retrieval systems, integrate LLMs with real-time web data, and drive evaluation and production experiments across embeddings and hybrid search. Join a fast-moving, ownership-driven team shaping the future of AI with cutting-edge research and tangible impact.

Qualifications

• 8+ years of experience in applied AI, ML, or software engineering.
• Proven track record shipping ML/AI systems to production at scale.
• Deep experience with search, retrieval, ranking, or recommender systems.
• Strong understanding of modern deep learning, including transformers and embeddings.
• Experience with LLM-integrated or knowledge-intensive systems.

Responsibilities

• Drive applied research and technical direction across retrieval and ranking systems.
• Design and evolve multi-stage retrieval architectures (query understanding, rewriting, reranking, iterative retrieval).
• Develop methods for grounding LLMs in real-time web data at scale.
• Define and implement evaluation paradigms and metrics for agentic systems, where correctness is not reducible to clicks.
• Lead experiments on embeddings, hybrid search, and reranking and bring them into production.
• Analyse trade-offs across relevance, latency, and cost at scale.
• Work closely with engineering to deploy systems in high-throughput, low-latency environments.
• Own ambiguous problems end to end and mentor engineers.

Skills

Applied AI

Search & retrieval

Large language models

Python

Go/C++

Production ML systems

LLM integration

Education

Master's degree in CS or related field

Tools

Go

C++

Python

Job description

Nebius, a leader in cloud AI infrastructure delivering an agent-native search platform, seeks a Staff Applied AI Researcher to own retrieval and ranking work at scale in Amsterdam.

You will design multi-stage retrieval systems, integrate LLMs with real-time web data, and drive evaluation and production experiments across embeddings and hybrid search. Join a fast-moving, ownership-driven team shaping the future of AI with cutting-edge research and tangible impact.