Senior Machine Learning Engineer | Upwork
Posted 2025-09-08
Remote, USA
Full Time
Immediate Start
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">Upwork ($UPWK) is the world’s work marketplace. We serve everyone from one-person startups to over 30% of the Fortune 100 with a powerful, trust-driven platform that enables companies and talent to work together in new ways that unlock their potential.</p>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">Last year, more than $3.8 billion of work was done through Upwork by skilled professionals who are gaining more control by finding work they are passionate about and innovating their careers.</p>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3"><strong class=" font-semibold">This is an engagement through Upwork’s Hybrid Workforce Solutions (HWS) Team. Our Hybrid Workforce Solutions Team is a global group of professionals that support Upwork’s business. Our HWS team members are located all over the world.</strong></p>
<hr>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">This Senior Machine Learning Engineer role offers a unique opportunity to work on cutting-edge machine learning applications that directly impact millions of users worldwide. You’ll tackle complex problems, uncover valuable insights from vast datasets, and shape the future of personalized recommendations.</p>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">By collaborating with a diverse team of experts, you’ll not only refine your technical skills but also see the tangible business impact of your work. If you’re passionate about innovation, large-scale system design, and driving meaningful change, this role provides an exciting platform to advance your career in a dynamic and influential environment.</p>
<hr>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3"><strong class=" font-semibold">Work/Project Scope:</strong></p>
<ul class=" text-base sm:text-lg marker:text-color list-inside list-disc text-gray-500 list-disc list-outside pl-3 mb-6">
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Analyze millions of structured and unstructured data points to identify patterns and insights in user behavior.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Build and implement features to enhance model performance, including the development of efficient and reusable models and systems for various machine learning applications (both classical and deep learning models).</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Optimize and contribute to the performance of recommendation systems by building machine learning models that improve understanding of user preferences, intent, and context to deliver accurate, relevant, and personalized recommendations.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Collaborate closely with business, analytics, and engineering teams to communicate data findings through statistics, charts, and formal presentations, ultimately proposing recommendations to maximize business impact.</span></li>
</ul>
<hr>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3"><strong class=" font-semibold">Must Haves (Required Skills):</strong></p>
<ul class=" text-base sm:text-lg marker:text-color list-inside list-disc text-gray-500 list-disc list-outside pl-3 mb-6">
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Proficiency in Python.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Strong SQL skills.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Experience with Pytorch, TensorFlow, or another deep learning library.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Familiarity with Spark or other big data tools.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Prior experience in scaling large-scale production systems to serve millions of users.</span></li>
</ul>
<hr>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">Upwork is proudly committed to fostering a diverse and inclusive workforce. We never discriminate based on race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical condition), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics.</p>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">To learn more about how Upwork processes and protects your personal information as part of the application process, please review our <a href="http://upwork.com/careers/job-applicant-privacy-notice" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">Global Job Applicant Privacy Notice</a></p>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">Last year, more than $3.8 billion of work was done through Upwork by skilled professionals who are gaining more control by finding work they are passionate about and innovating their careers.</p>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3"><strong class=" font-semibold">This is an engagement through Upwork’s Hybrid Workforce Solutions (HWS) Team. Our Hybrid Workforce Solutions Team is a global group of professionals that support Upwork’s business. Our HWS team members are located all over the world.</strong></p>
<hr>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">This Senior Machine Learning Engineer role offers a unique opportunity to work on cutting-edge machine learning applications that directly impact millions of users worldwide. You’ll tackle complex problems, uncover valuable insights from vast datasets, and shape the future of personalized recommendations.</p>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">By collaborating with a diverse team of experts, you’ll not only refine your technical skills but also see the tangible business impact of your work. If you’re passionate about innovation, large-scale system design, and driving meaningful change, this role provides an exciting platform to advance your career in a dynamic and influential environment.</p>
<hr>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3"><strong class=" font-semibold">Work/Project Scope:</strong></p>
<ul class=" text-base sm:text-lg marker:text-color list-inside list-disc text-gray-500 list-disc list-outside pl-3 mb-6">
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Analyze millions of structured and unstructured data points to identify patterns and insights in user behavior.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Build and implement features to enhance model performance, including the development of efficient and reusable models and systems for various machine learning applications (both classical and deep learning models).</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Optimize and contribute to the performance of recommendation systems by building machine learning models that improve understanding of user preferences, intent, and context to deliver accurate, relevant, and personalized recommendations.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Collaborate closely with business, analytics, and engineering teams to communicate data findings through statistics, charts, and formal presentations, ultimately proposing recommendations to maximize business impact.</span></li>
</ul>
<hr>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3"><strong class=" font-semibold">Must Haves (Required Skills):</strong></p>
<ul class=" text-base sm:text-lg marker:text-color list-inside list-disc text-gray-500 list-disc list-outside pl-3 mb-6">
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Proficiency in Python.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Strong SQL skills.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Experience with Pytorch, TensorFlow, or another deep learning library.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Familiarity with Spark or other big data tools.</span></li>
<li class=" leading-snug mb-2 pl-2"><span class="text-gray-200">Prior experience in scaling large-scale production systems to serve millions of users.</span></li>
</ul>
<hr>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">Upwork is proudly committed to fostering a diverse and inclusive workforce. We never discriminate based on race, religion, color, national origin, gender (including pregnancy, childbirth, or related medical condition), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, or other applicable legally protected characteristics.</p>
<p class=" text-gray-200 text-base sm:text-lg leading-relaxed mb-3">To learn more about how Upwork processes and protects your personal information as part of the application process, please review our <a href="http://upwork.com/careers/job-applicant-privacy-notice" target="_blank" class="break-all font-medium underline hover:opacity-75" rel="noopener noreferrer nofollow">Global Job Applicant Privacy Notice</a></p>