Search Senior Machine Learning Engineer

Perplexity · Belgrade · Search

senior machine learning Machine Learning Engineer ic 5+ yrs · Posted Mar 25, 2025
AI Summary
Senior ML Engineer building advanced search technologies focused on retrieval and ranking. Design and deploy models including LLMs, optimize RAG pipelines, and collaborate across teams. Requires 5+ years in search or recommender systems with deep expertise in retrieval systems and large-scale model deployment.
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Perplexity is seeking an experienced Senior Machine Learning Engineer to help build the next generation of advanced search technologies, with a focus on retrieval and ranking.

Responsibilities

  • Relentlessly push search quality forward—through models, data, tools, or any other leverage available

  • Architect and build core components of our search platform and model stack

  • Train and evaluate retrieval, ranking and classification models, including LLMs

  • Deploy models - from boosting to LLMs - in a scalable and performant way

  • Build and optimize RAG pipelines for grounding and answer generation

  • Collaborate with Data, AI, Infrastructure and Product teams to ensure fast and high quality delivery

Qualifications

  • Deep understanding of search and retrieval systems, including quality evaluation principles and metrics

  • Proven track record with large-scale search or recommender systems

  • Self-driven, with a strong sense of ownership and execution

  • Minimum of 5 years of working on search or recsys-related projects

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