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Member of Technical Staff (Machine Learning Engineer, Ranking Quality - Search)

Perplexity is seeking an experienced Machine Learning Engineer to improve search quality across the middle and later stages of ranking. We are looking for a strong ranking generalist who can own ambiguous problems end to end and brings exce

Company

Perplexity

Location

Belgrade; London

Status

Open

Posted

2026-08-12T11:36:20.792+00:00

Perplexity is hiring a senior machine learning engineer to improve search quality in the middle and later stages of ranking. The role covers the full ranking pipeline: defining evaluation, finding bottlenecks, training retrieval, ranking and classification models including neural and LLM-based approaches, and building feature computation, low-latency inference, cascades, deployment and monitoring. It asks for at least five years of industry experience, depth in search or recommender systems, proven ownership of a large-scale production ranking system, and strong machine-learning and software-engineering skills. The posting stresses end-to-end ownership of ambiguous, cross-team problems and trade-offs across quality, latency, reliability and cost.