Perplexity

Member of Technical Staff (Machine Learning Engineer, Search)

  • Belgrade · Belgrade, Serbia · London · Berlin
  • Remote
  • Data/ML Eng
  • Listed 25 Mar 2025

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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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