LinkedIn Engineering

LinkedIn rebuilt their job search system using advanced AI to move beyond keyword-based search to natural language understanding. The new system uses large language models, embedding-based retrieval, and GPU infrastructure to understand complex job search queries like 'Find remote software engineer jobs in Silicon Valley with above median pay.' The architecture splits into retrieval and ranking stages, uses synthetic training data generation, and employs model distillation techniques to balance accuracy with computational efficiency at scale.

Building the next generation of job search at LinkedIn

Fueling the system: generating quality training data

Scalable GPU infrastructure for retrieval

Enhanced ranking with cross-encoder models