Machine Learning Engineer, Audience Intelligence

Position Overview

• Location Type: Flexible-first workforce
• Job Type: Full-time
• 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 to become the Audience Intelligence Engine, aiming to synthesize signals into unified, real-time, and privacy-compliant user profiles. These profiles will power targeting, ranking, forecasting, and insights within Reddit's advertising ecosystem.

About the Role

As a Machine Learning Engineer on the Audience Intelligence team, you will be instrumental in developing 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 your models 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).
• Utilize diverse signals (on-platform behavior, off-platform partner data, contextual cues) to create predictive features.
• Conduct and analyze offline and online experiments to validate the impact of new intelligence features.
• Partner with software engineers to deploy models and ensure successful integration into real-time user profiles.
• Collaborate with the Ads Privacy team to ensure models and data handling practices are 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.
• Pragmatic, product-oriented mindset focused on building and shipping ML systems with measurable business impact.
• Effective communication skills for collaboration 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.
• 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.
• Supportive and inclusive work environment valuing work-life balance and professional growth.

Benefits

• Comprehensive Health Benefits
• Registered Retirement Savings Plan with matching contributions
• Inco