5+ years of experience in building and deploying scalable ML/AI models for large, user-facing products.
Expertise in deep learning frameworks such as PyTorch, TensorFlow, or JAX.
Strong software engineering skills, particularly in Python and collaborative coding practices.
Comprehensive knowledge of the ML lifecycle including data analysis, feature engineering, and model evaluation.
Excellent communication and collaboration skills, thriving in cross-functional teams.
Driven by curiosity and impact on end-users, with a passion for advancing ML/AI.
Relevant degree (BS, MS, or PhD) in Computer Science, Engineering, or a related field.
Responsibilities
Apply advanced ML and LLM techniques to enhance user personalization, query understanding, and content discovery.
Evaluate ML models using rigorous offline and online methods to gain insights into their effectiveness.
Manage the complete model lifecycle from research to production, focusing on iterative improvements.
Work collaboratively with engineers, product managers, data scientists, and designers to enhance the product using AI.
Keep up-to-date with the latest research and integrate innovative algorithms into development processes.
Benefits
Opportunity to work on impactful AI solutions that reach millions of users.
Collaborative work environment with cross-functional teams.
Access to cutting-edge technologies and techniques in machine learning and AI.
Encouragement of continuous learning and professional development in the field.
Full Job Description
Applied AI Engineer to design, build, and iterate on cutting-edge agents powering our core experience in Perplexity Computer. Working in this mission critical team, you will develop frontier context layer applications - fulfilling the curiosity of millions of users across the globe.
Key Responsibilities
Apply state-of-the-art ML and LLM techniques to solve problems spanning:
Personalization (LLM memory, context summarization, retrieval and ranking);
Contextual recommendations and Monetization applications
Build frontier agent capabilities on top of Perplexity Computer
Build auto research harness for 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 and build autonomous harness for agent squad to explore different problem spaces.
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.
Preferred Qualifications
5+ years experience building and shipping robust AI products for large-scale, user-facing or data-driven products.
Strong software engineering skills (Python, production-quality codebases, collaborative development) and experience using agentic coding tools for large scale parallel developments.
In-depth experience with the full AI lifecycle: data analysis, 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).
Bonus Points For
Experience with LLM context engineering or harness engineering.
Experience in mid-training or post-training frontier open source models
Experience in large scale user-centric and content-centric personalization challenges (user modeling, retrieval, content ranking, etc).
