London, GB

Senior Software Engineer, Real-time Bidding Platforms

At Quantcast, we use technology to help brands and publishers understand, reach, and influence the constantly-changing behaviors of consumers. The Real-time Bidding Platform owns and operates the large scale distributed stack which allocates millions of dollars of advertising budget to billions of bid opportunities streaming into the system. If you’re interested in working on these critical, fast, large scale distributed systems then we’d like to meet. Working side-by-side with engineers and modeling scientists you will build and operate intelligent bidding, optimization, prediction, and control systems that power different parts of this stack. You’ll lead projects to optimize the throughout of the stack while reducing costs and growing advertising performance. You’ll drive the design and implementation of new products for clients that’ll involve multiple teams and services. Responsibilities:

  • Scaling our bidding systems to process millions of requests per second
  • Mentoring junior engineers
  • Improving the development, testing, monitoring, and operational tools and processes
  • Talking to customers and users, discovering their requirements and helping plan for building their next feature requirements
  • Profiling and optimizing bidding machines at the JVM, Kernel, network and CPU levels
  • Setting up and running experiments to improve stability and bidding performance across the stack


  • 4+ years experience developing and working on distributed software systems
  • Experience delivering improvements in scale, runtime, cost, features or reliability under little supervision
  • Excellent skills in distributed system and software design, concurrent algorithms, data structures, and software engineering
  • Hands-on experience with Java, C, Go or a similar language
  • Degree in a topic related to Computer Science, or equivalent experience

Quantcast owns and operates the world’s largest audience insights and measurement platform on the open internet. Fueled by live data drawn from more than 100 million web and mobile destinations, Quantcast applies machine learning technology to help marketers, publishers, and agencies grow their brands by better understanding and predicting consumer interactions in real-time. Founded in 2006, Quantcast is headquartered in San Francisco and has employees in over 20 offices across 10 countries. We are committed to building an inclusive and diverse environment where everyone can be their authentic self. We will ensure that individuals with disabilities are provided a reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request the accommodation.

About Quantcast

As a global leader in artificial intelligence technology, Quantcast is using machine learning to inspire human learning to help brands grow in the AI-era. Founded in 2006, Quantcast is the the world’s largest AI-driven direct audience insights and measurement platform.  Measuring over 100 million web and mobile destinations, Quantcast has created the “consumer behavior graph” becoming the real-time pulse of the Internet helping marketers, publishers, agencies and consultancies understand, optimize and predict consumer interactions to drive business outcomes. Headquartered in San Francisco. Quantcast employs approximately 800 employees in 22 offices across 10 countries.