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Perplexity is an AI-powered answer engine founded in December 2022 and growing rapidly as one of the world’s leading AI platforms. Perplexity has raised over $1B in venture investment from some of the world’s most visionary and successful leaders, including Elad Gil, Daniel Gross, Jeff Bezos, Accel, IVP, NEA, NVIDIA, Samsung, and many more. Our objective is to build accurate, trustworthy AI that powers decision-making for people and assistive AI wherever decisions are being made. Throughout human history, change and innovation have always been driven by curious people. Today, curious people use Perplexity to answer more than 780 million queries every month–a number that’s growing rapidly for one simple reason: everyone can be curious. Perplexity is seeking top level AI Research Engineers to continue to improve our in house Online LLMs, the Sonar models. Your job is to take advantage of our rich query/answer dataset to continue to scale our Sonar model performance and provide the SOTA Online LLM experience to our users. Responsibilities Post-train SOTA LLMs on query answering by using the latest in supervised and reinforcement learning techniques Own the full stack data, training, and eval pipelines required to post-train LLM models Deliver Sonar models that provide SOTA query answering Work closing with engineering teams to integrate Sonar models into our product Qualifications Proven experience with large-scale LLMs and Deep Learning systems Strong programming skills; versatility is a plus Self-starter with a willingness to take ownership of tasks Passion for tackling challenging problems Minimum of 2 years

of working on relevant projects Nice-to-have PhD in Machine Learning or related areas. Experience in post-training LLMs with SFT/DPO/GRPO. The cash compensation range for this role is $190,000 - $260,000. Final offer amounts are determined by multiple factors, including, experience and expertise, and may vary from the amounts listed above. Equity: In addition to the base salary, equitymay be partof the total compensation package.

Apply fast, check the full description by scrolling below to find out the full requirements for this role. Benefits: Comprehensive health, dental, and vision insurance for you and your dependents. Includes a 401(k) plan. Create a Job Alert Interested in building your career at Perplexity AI? Get future opportunities sent straight to your email. Apply for this job indicates a required field First Name * Last Name * Email * Phone * Resume/CV * Enter manually Accepted file types: pdf, doc, docx, txt, rtf Enter manually Accepted file types: pdf, doc, docx, txt, rtf Website LinkedIn Profile Will you now or in the future require visa sponsorship for employment? * Select... Perplexity has an office-centric work model with 4 days per week in the office from the following locations: San Francisco, Palo Alto, or New York. Are you willing to come in 4 days per week? * Select... If you are not based in any of these locations, are you open to relocation to either San Francisco, Palo Alto, or New York? * Select... Please give us a brief description of your current LLM Post Training experience or projects. *

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