Reddit, Inc.
Reddit, Inc.
501 – 1,000 Employees
ConsultingMarketingMedia
Reddit, Inc. operates a social media platform built around thousands of user-created communities. People use Reddit to share posts, discuss breaking news and specialized interests, and shape conversations through comments and votes. With a global user base and a team of 501–1,000 employees, the company works at the intersection of media, marketing, and online community engagement.

Staff Machine Learning Engineer, Ads Creative Effectiveness — Remote, United States

Lead machine learning development for Reddit’s generative AI and predictive advertising-creative products. Build image, video, and copy generation systems designed to improve advertiser campaign performance.

Description

  • Design and implement advanced pipelines for generating advertising creative
  • Develop systems that preserve products, fonts, logos, and other brand assets using methods such as IP-Adapters and LoRAs
  • Create image and video editing features for smart cropping, inpainting, outpainting, resizing, and style transfer
  • Fine-tune large vision-language models to identify characteristics of effective advertising aesthetics
  • Use CTR and CVR feedback loops to improve ad generation through RLHF and RLPF
  • Build filtering and safety mechanisms that block non-compliant, unsafe, or copyright-infringing content
  • Partner with Product, Sales, Policy, UX, and Ads ML teams
  • Integrate Ads Creative Effectiveness features into the Ad Manager interface and ad-delivery workflow
  • Implement brand-safety filters, copyright validation, and human escalation processes

Requirements

  • Practical experience with tree-based models, neural networks, ranking systems, and particularly LLM/VLM fine-tuning plus RLHF/RLPF for advertising
  • Familiarity with uplift metrics, variance, minimum detectable effects, and experimentation design for generative systems
  • Knowledge of auction dynamics and advertiser challenges
  • Ability to explain complex machine learning trade-offs to executives, product managers, and non-technical audiences
  • Previous experience building advertising-creative tools such as headline or image generators, pre-test models, or advertiser editing workflows
  • Experience working with brand-safety, privacy, or copyright requirements in generative AI products is desirable

Benefits

  • Comprehensive healthcare coverage and income-replacement programs
  • 401(k) plan with employer matching
  • Global benefits supporting workspace needs, professional development, caregiving, and lifestyle priorities
  • Family-planning support
  • Gender-affirming care
  • Mental health and coaching resources
  • Flexible vacation and paid volunteer time off
  • Generous paid parental leave
  • Restricted stock unit equity
  • Potential commission, depending on the position offered
  • Medical, dental, and vision insurance
  • Option to decline interview recording, transcription, and summarization

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