Position Title: Machine Learning Engineer

Data Science is pretty much our business: we drive conversions. Given our massive scale, relatively modest improvements can have an outsized impact. ⚡ If you’re looking to be a point of influence on a celebrated team (*not* just another ⚙️in a giant machine), and implement cutting edge machine learning tools — this gig is for you. 

Responsibilities:

• Experiment and improve machine learning models for the recommendation/ad optimization system. 
• Inform bidding strategy and data engineering architecture. 
• Understand various ad-optimization algorithms (CTR prediction, eCPM optimization, user targeting and segmentation, RTB optimization, Exploration/Exploitation Algos) 

Competencies:

• Bachelor's Degree in relevant field + 2 years of professional experience
• Solid coding skills in SQL and in a scripting language like Python. 
• Packages: scikit-learn, TensorFlow. 
• Scaling GPU clusters to train deep neural networks. 
• Deep expertise in recommendation systems, classification models, class imbalance, and model calibration. 
• Experience with BigQuery or PySpark or another modern method to access data. 
• Experience with deploying and monitoring real-time model endpoint in AWS SageMaker is a plus 
• Experimental Design and statistical inference. 

Bonus:

• Domain and/or marketplace knowledge 

Tapjoy is a leading mobile advertising and app monetization company. Our platform empowers advertisers to connect with over 1 billion monthly active users through value exchange advertising that drives awareness, engagement, and the metrics that matter most to their overall growth. Meanwhile, companies such as Scopely, Glu, Ludia, and many of the Top 200 grossing app publishers trust our platform to monetize their content, grow their audiences, and reward their users. Founded in 2007 and headquartered in San Francisco, Tapjoy is a global organization with offices in Santa Barbara, Boston, London, Beijing, Tokyo, and Seoul.

Tapjoy is an equal opportunity employer. We believe that diversity and inclusion lead to stronger, more innovative teams and better business results; we want to draw from the broadest talent pool possible and encourage qualified applicants. Tapjoy does not discriminate on the basis of sex, race, ethnicity, color, age, sexual orientation, gender (including identity and expression), disability (mental or physical), religion, national origin, citizenship, marital status, military or veteran status, or any other protected classification protected by applicable law; we will provide reasonable accommodations for qualified individuals with disabilities, and pursuant to applicable fair chance ordinances, we will consider for employment qualified applicants with arrest and conviction records.

For more information, please visit www.tapjoy.com.