Senior Data Scientist - ML - job 3 of 8

Reddit is a community of communities. It’s built on shared interests, passion, and trust and is home to the most open and authentic conversations on the internet. Every day, Reddit users submit, vote, and comment on the topics they care most about. With 100,000+ active communities and approximately 82M+ daily active unique visitors, Reddit is one of the internet’s largest sources of information. For more information, visit redditinc.com.Ads Retrieval team’s mission is to identify the business opportunities, provide ML models and data driven solutions on candidate sourcing, recommendation, early ranking and filtering in Ads upper funnel. The team works on:• Build and iterate on candidate sourcing and early ranking Machine Learning models and algorithms to find the most relevant, engaging and diversified ads candidates for global optimization and various product use cases.• Design and establish a large scale candidate indexing system to enable efficient candidate retrieval at a scale of millions to billions, which powers ads recommendation and ranking with good balance between quality and computation efficiency.As a machine learning engineer in the ads retrieval team, you will research, formulate and execute on our mission to build end-to-end ML solutions and deliver the right ad to the right user under the right context with data and ML driven solutions.Your Responsibilities:• Building ads retrieval and early ranking system for critical ML tasks with advanced industrial level techniques• Research, implement, test, and launch new model architectures including information retrieval, ANN, recommendation system, deep neural networks within high dimensional information system• Work on large scale data systems, backend services and product integration• Collaborate closely with multiple stakeholders cross product, engineering, research and marketingWho You Might Be:• 2+ years of experience with applied machine learning models with Tensorflow/Pytorch with large-scale ML systems• 3+ years of end-to-end experience of training, evaluating, testing, and deploying machine learning models• Proficiency with programming languages (Java, Python, Golang, C++, or similar) and statistical analysis.• Experience of orchestrating complicated data pipelines and system engineering on large-scale dataset• Prior experience with information retrieval and recommendation system• Ads domain knowledge on product and ML solutions is a plusBenefits:• Pension Savings plan• Medical Plan• Short term sickness benefits• WIA excess and WGA gap insurance• Workspace benefits for your home office• Personal & Professional development funds• Family Planning Support• Flexible Vacation & Reddit Global Days OffJoin us at Reddit, and help us build a community that is inclusive and empowering for everyone.Reddit is proud to be an equal opportunity employer, and is committed to building a workforce representative of the diverse communities we serve. Reddit is committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures. If you need assistance or an accommodation due to a disability, please contact us at ApplicationAssistance@Reddit.com.