Machine Learning Engineer, Audience Intelligence

Position Overview

• Location Type: Flexible-first workforce
• Job Type: Not specified
• Salary: Not specified

Reddit is a community of communities, built on shared interests, passion, and trust. It's home to authentic conversations and is one of the internet’s largest sources of information, with over 100,000 active communities and approximately 101M+ daily active unique visitors.

The Ads Targeting team is evolving into the Audience Intelligence Engine, aiming to develop robust, scalable, and privacy-compliant targeting products. The mission is to synthesize signals into unified, real-time, and privacy-compliant user profiles to power various aspects of Reddit's advertising ecosystem.

About the Role

As a Machine Learning Engineer on the Audience Intelligence team, you will be instrumental in transforming the team's capabilities. You will design and develop machine learning models to generate new user intelligence at scale. This is a collaborative role focused on modeling excellence, partnering with software engineers to integrate model-produced intelligence into the advertising ecosystem, and directly enhancing user understanding and advertiser outcomes.

Responsibilities

• Design and develop machine learning models to infer and assess user attributes (e.g., Age, Gender, Language, In-Market status, etc.).
• Utilize diverse signals, including on-platform behavior (1P), off-platform partner data (3P), and contextual cues, to create predictive features for models.
• Conduct and analyze offline and online experiments to validate the impact of new intelligence features on Targeting Products and downstream serving ecosystem components.
• Partner closely with software engineers to deploy models and ensure the intelligence they produce is successfully integrated into real-time user profiles.
• Collaborate with the Ads Privacy team to ensure all models and data handling practices are secure and compliant with policies like GDPR, CCPA, and ATT.

Requirements

• 2+ years of experience with applied machine learning models.
• Proficiency in programming languages (Python, SQL) and statistical analysis.
• A pragmatic, product-oriented mindset focused on building and shipping ML systems that deliver measurable business impact.
• Effective communication skills to collaborate with diverse teams and stakeholders.
• Passion for empowering communities and advertisers through innovative ML solutions.

Nice to Have

• Experience with large-scale data processing and pipeline orchestration tools.
• Familiarity with advertising technology (ad tech) concepts and metrics.
• Experience building models for inference on user behavior or characteristics.
• Experience with deep learning, representation learning, or transfer learning.
• Familiarity with MLOps tools and ML experimentation workflows.

Why Join Us

• Opportunity to build a critical intelligence system from the ground up as part of a small, focused team building the Audience Intelligence Engine from 0 to 1.
• Your work will have a foundational impact on the future of Reddit's advertising business.
• Collaborate with a diverse and talented team of engineers, researchers, and marketers.
• Develop skills in machine learning, deep learning, and large-scale system design.
• Enjoy a supportive and inclusive work environment that values work-life balance and professional growth.

Benefits

• Comprehensive Health Benefits
• Registered Retirement Savings Plan with matching contributions
• Inco (incomplete information)