Senior Software Engineer, Web-Scale Crawling & AI Search

Nebius; Greater London; On-site; GBP 90,000 - 140,000; 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 and talented

Job summary

Nebius is building a full-stack AI cloud platform and a novel search engine. We seek a Senior Software Engineer to work on the content acquisition and crawling infrastructure, discovering, fetching, and refreshing data from the open web at scale.

You will design distributed crawling, scheduling, and ingestion systems for billions of URLs, balancing coverage, freshness, and cost while collaborating with indexing and ML teams to meet retrieval and ranking requirements.

Qualifications

• 5+ years of experience building backend or distributed systems.
• Strong Go or C++ expertise.
• Experience with large-scale distributed systems (10k+ RPS, billions of URLs, high-throughput pipelines).
• Understanding of web protocols (HTTP, DNS, TLS), crawling, scraping, content extraction.

Responsibilities

• Design, implement, and operate web-scale crawling systems for acquiring content from the internet.
• Build ingestion workflows for internal and external data sources, including crawlers, structured feeds, and partner integrations.
• Develop crawl scheduling, prioritisation, recrawl policies, and freshness strategies.
• Build systems for URL discovery, deduplication, content extraction, and crawl orchestration.
• Ensure reliable operation of crawling infrastructure under high-throughput conditions.
• Define observability and quality metrics for crawl coverage, freshness, throughput, and content quality.
• Monitor resource usage, bandwidth consumption, and infrastructure cost.
• Collaborate with indexing and ML teams to ensure acquired content meets retrieval and ranking requirements.
• Enable safe experimentation with crawling strategies and content acquisition policies.

Skills

Go

C++

Distributed systems

Web protocols

Observability

Job description

Nebius is building a full-stack AI cloud platform and a novel search engine. We seek a Senior Software Engineer to work on the content acquisition and crawling infrastructure, discovering, fetching, and refreshing data from the open web at scale.

You will design distributed crawling, scheduling, and ingestion systems for billions of URLs, balancing coverage, freshness, and cost while collaborating with indexing and ML teams to meet retrieval and ranking requirements.