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Senior Data Scientist, Ads Machine Learning at Reddit

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Our mission is to bring community and belonging to everyone in the world. Reddit is a community of communities where people can dive into anything through experiences built around their interests, hobbies, and passions. With more than 50 million people visiting 100,000+ communities daily, it is home to the most open and authentic conversations on the internet. From pets to parenting, skincare to stocks, there’s a community for everybody on Reddit. For more information, visit redditinc.com

We are looking for a Machine Learning Data Scientist to work within the Ads Data team. You will work closely with engineers and product owners from our Ads team to optimize ads delivery and auction systems. In addition to strong modeling skills, this person has a solid business acumen and understands what is important to advertisers.

Reddit is continuing to grow our teams with the best talent. We're completely remote friendly and will continue to be after the pandemic.

Responsibilities:

  • Build optimization algorithms that improve ad yields and efficiencies. Some of the models we developed over the last year are CPC (cost per click), CPI (cost per install), Generalized pCVR (probability of conversion rate), ALO (Ad Level Optimization) and User Lookalikes. You will not only work on improving existing optimization models, but also develop new models from scratch for a variety of upcoming product launches.
  • Build and improve Machine Learning algorithms that match ads to the most relevant users. Some of the algorithms/techniques used are Logistic Regression, Gradient Boosted Decision Trees, Random Forests, Hyperparameter tuning, Thompson Sampling, Monte Carlo simulations, Semantic Embedding models etc.
  • Build a platform for rapid model iteration and feature engineering at scale. Some of our optimization models are iterated on and deployed in production every 2 weeks. 
  • Be involved in all phases of modeling such as ideation, offline modeling, online implementation, experimentation, deploy and post-launch monitoring/measurements.
  • This role will have a lot of overlap with other Machine Learning Engineer roles, but will differ in a couple of areas. First is that you will work mainly on offline modeling and rely on engineers to productionize your models. Secondly, you will have a keen interest in the collection and quality of underlying data, along with working on ETLs and data aggregations.
  • Serve as a thought-partner for product managers, engineering managers and leadership in influencing the monetization roadmap and strategy for Reddit by identifying opportunities through deep-dive analyses and/or modeling.
  • Deeply understand ad auctions and how bid densities affect CPMs, CPCs and revenue
  • Develop familiarity with different types of ads such as managed/reserved, auction, takeover and self-serve; and understand specific interplays amongst those ads.
  • Work closely with our Sales and Marketing partners so the ads are set up in a way that amplifies the benefits of your optimization models.

What We Can Expect From You:

  • Bachelor’s degree or above in a quantitative major (e.g., mathematics, statistics, economics, finance, computer science). 
  • Proficiency in Machine Learning
  • NLP experience strongly preferred
  • Proficiency with statistical analysis and programming languages (Python, SQL)
  • Understanding of experimentation and causal inference analyses
  • Master’s or PhD degree preferred but not required.
  • 2+ years of experience (for Bachelor’s); 1+ years of experience (for Master’s/Phd) in quantitative/modeling roles, preferably for a consumer-facing service/app
  • Experience in online advertising is preferred but not required

Reddit is committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures. If you need assistance or an accommodation due to a disability, please contact us at [email protected].

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Technology we use

  • Engineering
    • GolangLanguages
    • SparkFrameworks
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What are Reddit Perks + Benefits

Reddit Benefits Overview

Reddit is all about diving into your passions and interests. Our benefits are flexible, putting your wellness needs first, so we can build a vibrant culture where we work and thrive together.

Culture
Volunteer in local community
Reddit encourages its employees to take advantage of its Volunteer time-off policy which gives employees eight hours per month to make an impact in their communities via volunteer work.
Friends outside of work
Intracompany committees
Daily sync
Open door policy
Team owned deliverables
Team based strategic planning
Group brainstorming sessions
Open office floor plan
Diversity
Dedicated Diversity/Inclusion Staff
Unconscious bias training
Diversity manifesto
Diversity Employee Resource Groups
Hiring Practices that Promote Diversity
Health Insurance & Wellness Benefits
Flexible Spending Account (FSA)
Disability Insurance
Dental Benefits
Vision Benefits
Health Insurance Benefits
Life Insurance
Pet Insurance
Reddit offers a 10% discount on pet insurance.
Wellness Programs
Reddit offers personal, professional, and workspace wellness programs.
Team workouts
Mental Health Benefits
Retirement & Stock Options Benefits
401(K)
401(K) Matching
Company Equity
Performance Bonus
Child Care & Parental Leave Benefits
Child Care Benefits
Reddit will fund up to $5,000 per year towards your day care FSA.
Generous Parental Leave
Non-birthing parents receive up to 16 weeks of paid parental leave. Birthing parents receive 22+ weeks of paid parental leave.
Flexible Work Schedule
Remote Work Program
Family Medical Leave
Reddit offers up to 17 weeks of paid family medical leave.
Adoption Assistance
Reddit will reimburse up to $25,000 for adoption and surrogacy expenses, and provide up to 16 weeks of paid bonding leave.
Company sponsored family events
Vacation & Time Off Benefits
Unlimited Vacation Policy
Generous PTO
In addition to an unlimited vacation policy, Reddit offers one paid wellness day off per month.
Paid Volunteer Time
Paid Holidays
Paid Sick Days
Perks & Discounts
Casual Dress
Commuter Benefits
Reddit will fund up to $150 per month towards your parking and public transportation costs to commute into the office.
Company Outings
Free Daily Meals
Enjoy free lunch in all of our offices!
Stocked Kitchen
All of our offices are stocked with delicious snacks and beverages!
Happy Hours
Relocation Assistance
Fitness Subsidies
Utilize your personal wellness stipend to fund your fitness and take advantage of nationwide discounts for Classpass.
Home Office Stipend for Remote Employees
Professional Development Benefits
Job Training & Conferences
Diversity Program
Lunch and learns
Cross functional training encouraged
Promote from within
Mentorship program
Continuing Education stipend

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