<?xml version="1.0" encoding="UTF-8"?>
<source>
  <jobs>
    <job>
      <externalid>aa8c53c2-ca3</externalid>
      <Title>Search Machine Learning Research Engineer</Title>
      <Description><![CDATA[<p>Perplexity is seeking an experienced Senior Machine Learning Engineer to help build the next generation of advanced search technologies, with a focus on retrieval and ranking. The successful candidate will be responsible for pushing search quality forward through models, data, tools, or any other leverage available.</p>
<p><strong>What you&#39;ll do</strong></p>
<p>The Senior Machine Learning Engineer will be responsible for architecting and building core components of the search platform and model stack. This will include designing, training, and optimizing large-scale deep learning models using frameworks like PyTorch, leveraging distributed training (e.g., PyTorch Distributed, DeepSpeed, FSDP) and hardware acceleration, with a focus on retrieval and ranking models.</p>
<ul>
<li>Relentlessly push search quality forward — through models, data, tools, or any other leverage available</li>
<li>Architect and build core components of the search platform and model stack</li>
<li>Design, train, and optimize large-scale deep learning models using frameworks like PyTorch, leveraging distributed training (e.g., PyTorch Distributed, DeepSpeed, FSDP) and hardware acceleration, with a focus on retrieval and ranking models</li>
</ul>
<p><strong>What you need</strong></p>
<p>The successful candidate will need to have a deep understanding of search and retrieval systems, including quality evaluation principles and metrics. They will also need to have a proven track record with large-scale search or recommender systems, and strong proficiency with PyTorch, including experience in distributed training techniques and performance optimization for large models.</p>
<p style="margin-top:24px;font-size:13px;color:#666;">XML job scraping automation by <a href="https://yubhub.co">YubHub</a></p>]]></Description>
      <Jobtype>full-time</Jobtype>
      <Experiencelevel>senior</Experiencelevel>
      <Workarrangement>onsite</Workarrangement>
      <Salaryrange></Salaryrange>
      <Skills>deep understanding of search and retrieval systems, proven track record with large-scale search or recommender systems, strong proficiency with PyTorch, representation learning, contrastive learning, embedding space alignment for multilingual and multimodal applications</Skills>
      <Category>Engineering</Category>
      <Industry>Technology</Industry>
      <Employername>Perplexity</Employername>
      <Employerlogo>https://logos.yubhub.co/perplexity.com.png</Employerlogo>
      <Employerdescription>Perplexity is a company that is seeking an experienced Senior Machine Learning Engineer to help build the next generation of advanced search technologies, with a focus on retrieval and ranking. They are a team of experts in search and retrieval systems, with a strong publication record in AI/ML conferences or workshops.</Employerdescription>
      <Employerwebsite>https://jobs.ashbyhq.com</Employerwebsite>
      <Compensationcurrency></Compensationcurrency>
      <Compensationmin></Compensationmin>
      <Compensationmax></Compensationmax>
      <Applyto>https://jobs.ashbyhq.com/perplexity/cc66944f-5937-42c7-9865-6f45a3a5c952</Applyto>
      <Location>Berlin</Location>
      <Country></Country>
      <Postedate>2026-03-04</Postedate>
    </job>
  </jobs>
</source>