1. What is a Machine Learning Engineer at Quinstreet?
At Quinstreet, a leader in performance marketing, the Machine Learning Engineer—specifically within the ranking and recommendation domain—plays a pivotal role in driving the company's core marketplace engine. Quinstreet connects high-intent consumers with top brands and service providers across major verticals like financial services, insurance, and home services. The efficiency of this marketplace depends entirely on matching the right user with the most relevant advertiser in real time.
As a Senior Machine Learning Engineer - Ranking, you will design, build, and scale the algorithms that power these high-throughput matching engines. Your models will predict user behavior, optimize bidding strategies, and rank search and recommendation results. Because even a fractional percentage improvement in click-through rate (CTR) or conversion rate (CVR) translates directly to millions of dollars in revenue, your work will have an immediate, highly visible impact on the business.
This role sits at the intersection of advanced machine learning, big data engineering, and real-time systems. You will work on highly complex problems such as cold-start recommendation, multi-task learning, and real-time feature extraction. It is an inspiring environment for engineers who love to see their code and models directly influence transactional business metrics at scale.




