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Member of Technical Staff (Machine Learning Engineer, Search)

Perplexity

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What learning roles keep asking for: Machine learning (48%), Python (36%), LLMs (22%), PyTorch (22%), Deep learning (16%), AWS (13%), Generative AI (13%) — counted across their open postings here.

Member of Technical Staff jobs in the United Kingdom · Remote Member of Technical Staff jobs · LLMs jobs · Machine learning jobs · RAG jobs

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Preparing for this interview

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Questions you are likely to be asked

  1. Why do you want to join Perplexity?
  2. What is your experience with LLMs? Tell me one thing you learned the hard way.
  3. How did you know your model was actually good, and not just good on your test set?
  4. Tell me about a time the data was messy or wrong. What did you do?
  5. How would you explain your model's result to someone who is not technical?

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Perplexity is seeking an experienced 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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Listed on ashby · posted 2025-03-25. ApplySarthi collects openings and links to application pages; the role is advertised by Perplexity, not by us.