Chewy: Data scientist
343 Congress Street
Boston, MA 02110


Employee Testimonials

Our Opportunity:

Chewy is seeking a highly motivated, goal-oriented, and analytical, Senior Data Scientist, Fraud to join our exciting and fast paced company in Boston, MA. Our team is growing and if you are equally passionate about data analysis, e-commerce, and career growth, an opportunity at Chewy may be a great match! You will be focused on solving business problems by developing and implementing best-in-class fraud prevention and detection models. In this role, you will be the analytical expert for identifying and retooling suitable machine learning algorithms that can enhance the fraud risk ranking of particular transactions and/or applications for new products. You will cooperate with cross-functional teams across the organization in finding insights and developing the right data solutions.

You should be effective at organizing large amounts of data from multiple data sources and build predictive anomaly detection machine learning models that will help in identifying valid Fraudulent transactions . Your expertise and insights will help us effectively utilize data assets like past Order/Fraud history to control fraud loss and improve customer experience.

What youll do:

  • Research, design, and implement predictive models and classifiers built off of billions of rows of data
  • Routinely and effectively partner with digital marketing team to define key business questions and build the models and data sets that answer these questions
  • Lead identification of trends and KPIs with the objective of improving marketing performance
  • Mentor junior data analysts and demonstrate Data Science and development best practices

What youll need

  • An M.S., P.H.D., or equivalent experience in a related discipline (Engineering, Mathematics, Physics, Finance or C.S.)
  • Experience in Python, R, or other Data Science object oriented programming language
  • Experience with applying machine learning techniques at scale and their tuning parameters (Neural Networks, Random Forest, Bayesian Models, K-Means Clustering)
  • 5 years of experience applying Machine Learning, Statistical Modeling, and Data Mining
  • Experience with SQL, NoSQL, and unstructured databases (MySQL, Hadoop, Redshift, MongoDB)
  • Hands on experience with software design for scalability, reliability, and performance
  • Proven track record in developing mathematical models to predict business outcomes and determine cause and effect relationships
  • Candidate must be organized, driven, and exhibit critical thinking skills.
  • Candidate must have an entrepreneurial and self-starting mentality.
  • Position may require travel


  • Knowledge of Atlassian suite of tools (Jira, Bamboo, Confluence)
  • Experience working in Agile teams (Scrum, Kanban)
  • Experience in working with digital marketing channels in an eCommerce environment.
  • Knowledge of / experience with multi-channel and cross-channel attribution.
  • Extensive CLI and UNIX experience we live in the terminal!
  • Knowledge of VM test environments and/or cloud-based compute environments

If you have a disability under the Americans with Disabilities Act or similar law, or you require a religious accommodation, and you wish to discuss potential accommodations related to applying for employment at our company, please contact

To access Chewys Privacy Policy, which contains information regarding information collected from job applicants and how we use it, please click here: Chewy Privacy Policy.


Employee Testimonials

Bill Poitras
Software Engineer

It’s amazing working with such a diverse group of talented people at Chewy! I really love the culture of fun, collaboration, hard work, and innovation that I’ve seen throughout the company. I especially am impressed the lengths our company strives to wow our customers. I’ve witnessed first-hand how our customer service representatives not only encourage the passion of pet parents, but share their own. I’m grateful for the opportunity to learn so much new technology and the world of e-commerce.

Becca Litwack
Affiliate Marketing Manager

The environment at Chewy is energizing and there is a strong sense of purpose. Our focused attention to the customer leads to great enthusiasm for the work we get to do. There is real comradery on the teams as well – our team frequently lunches together which lends to a friendly work environment, collaboration, and innovation. Having dogs in the office doesn’t hurt either!

Shantesh Kanekar
Director of Software Engineering

The company known for best in class Customer Service knows how to keep its internal customers (our team members) happy, too. There is a positive energy and vibe the moment you set foot in the office. The workforce at Chewy is a vibrant mix of diversity in all aspects but one thing that is common is the shared belief of being the best in class at whatever job function one is in.

Chris Foley
Senior Software Development Manager

Working at Chewy is fast-paced, challenging, and very fulfilling. Each person here has the opportunity to have a profound effect on how we wow both our internal and external customers. We place a very high value on customer service here at Chewy and regardless of what you are working on, the customer satisfaction is always going to be #1. By everyone working towards the same common goal, teamwork organically happens in everything we do.