Perplexity · 3 months ago
AI Engineer, Applied ML
New York City
Full-time
Onsite
Senior Level
5+ years expPerplexity is an AI-powered answer engine rapidly growing as a leading AI platform. They are seeking an Applied ML Engineer to design, build, and iterate on cutting-edge AI models, focusing on user personalization, query understanding, and content discovery to enhance the experience for millions of users globally.
Artificial Intelligence (AI)ChatbotMachine LearningNatural Language ProcessingSearch Engine
Responsibilities
Apply state-of-the-art ML and LLM techniques to solve problems spanning:
Personalization (LLM memory, context summarization, retrieval and ranking)
Query Understanding (intent modeling, rewriting, agentic decomposition)
Content Discovery (feed ranking and surfacing)
Rigorously evaluate LLM/ML models with both offline and online techniques, designing experiments and metrics that provide deep insight into quality and impact
Own the entire model lifecycle from research to production: data analysis, modeling, evaluation, offline/online A/B testing, and iterative improvement
Collaborate cross-functionally with engineers, PMs, data scientists, and designers to ensure our AI drives meaningful product improvements
Stay at the forefront of ML/AI innovation by evaluating and incorporating emerging research and algorithms into the product lifecycle
Qualification
Required
5+ years experience building and shipping robust ML/AI models for large-scale, user-facing or data-driven products
Deep expertise in deep learning (PyTorch, TensorFlow, JAX), LLMs, information retrieval, content summarization, recommendation systems, NLP, and/or ranking
Strong software engineering skills (Python, production-quality codebases, collaborative development)
In-depth experience with the full ML lifecycle: data analysis, feature engineering, iterative model development, rigorous evaluation, and ongoing monitoring/improvement
Proven collaborator and communicator; excels in high-velocity, cross-functional teams
Curious, driven by end-user/product impact, and passionate about advancing the state of applied ML and AI
BS, MS, or PhD in Computer Science, Engineering, or related field (or equivalent experience)
Preferred
Experience with LLM prompt engineering, Retrieval-augmented generation (RAG) based systems
Experience in large scale user-centric and content-centric personalization challenges (user modeling, retrieval, content ranking, etc)
Open-source or published contributions in ML, NLP, IR, or relevant research fields
Company
Perplexity
Perplexity is an AI-powered answer engine designed to provide accurate, real-time responses to user queries.
201-500 employees
H1B Sponsorship
Perplexity has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (12)
2024 (7)
2023 (2)
Funding
Current Stage
Late StageTotal Funding
$1.48BKey Investors
Cristiano RonaldoNuVenturesAccel
2025-12-05Undisclosed
2025-09-10Series Unknown· $200M
2025-08-15Secondary Market
Leadership Team
Aravind Srinivas
Cofounder, President, CEO
Denis Yarats
Co-Founder & CTO
Recent News
2026-01-12
Business Insider
2026-01-11
2026-01-11
Company data provided by crunchbase