Senior Software Engineer, Inventory Performance

Quantcast is hiring a Senior Software Engineer to join our Inventory Performance team in our London office.

We have created one of the world's largest, living data-sets and we use it to bring unparalleled relevance to online advertising. By utilizing technology and big data to understand digital audiences, Quantcast solves the biggest challenges in marketing. 

As a Senior Software Engineer, you will help lead our efforts in designing, implementing, and operating large-scale machine learning systems in a production environment. You will develop techniques to efficiently extract meaning from petabytes of data, either to model suspicious online behavior to track down botnets and other fraudsters, or to understand and describe the interests and trends of the online community.

The Inventory Performance team drives improved performance for brands by delivering relevant advertising across the digital ecosystem. They also build defenses in order to protect brands against fraudsters trying to siphon money our of the advertising space. 


  • Own the development and operation of ML systems and infrastructure to run advertising campaigns at a global scale
  • Collaborate with other engineers and work on a variety of large scale systems including our MapReduce cluster and global real-time bidding system
  • Work within a machine learning group that is obsessed with improving the state of the art in performance advertising
  • Improve existing ad targeting and/or anti-fraud products and introduce new end-to-end products to delight our customers
  • Interface with Product & Business Operations teams to translate business requirements into robust and scalable solutions


  • B.S. in Computer Science or related technical field
  • 3+ years experience with high volume data processing
  • Experience with Distributed Computing / MapReduce or other large scale computing systems such as Hadoop, Kubernetes and Spark
  • Hands-on experience creating high performance programs in Java, Python or similar object oriented programming language

Bonus Points

  • Experience in high volume data processing in the online space

Quantcast is a late-stage, pre-IPO startup headquartered in San Francisco with offices around the world. We are committed to building an inclusive and diverse environment where everyone can be their authentic self.

Meet Some of Quantcast's Employees

Lindsey M.

Research Analyst

Lindsey looks at performance targeting pipelines for Quantcast to pinpoint inefficiencies. Then, she shares processed insights on customer targeting to make it better down the road.

Rodney C.

Senior Account Manager

Rodney manages a book of accounts in Northern California in order to assist clients. He helps integrate new products and strategies in order to build business.

Back to top