Open roles at Y Combinator–backed companies, from current batches to graduated unicorns.
Reddit is a community of communities. It’s built on shared interests, passion, and trust, and is home to the most open and authentic conversations on the internet. Every day, Reddit users submit, vote, and comment on th…
Leads the technical vision for Reddit’s ads measurement systems, designing privacy-aware frameworks for incrementality, identity, and signal quality to connect ad exposure to advertiser outcomes.
Leads the product strategy for Reddit's Ads Trust & Safety systems, balancing advertiser success with fraud prevention, policy enforcement, and platform integrity across a global ad ecosystem.
Lead relevance measurement and evaluation for feeds and search using Python/R/SQL, causal inference, and experimentation to improve ranking algorithms.
Lead data science initiatives to improve content ranking, search, and recommendations on Reddit, designing metrics and experiments to enhance user experience and community engagement.
Build and evolve auction, bidding, and pacing systems for Reddit's ads marketplace as a Senior IC4 ML Engineer. Design optimization algorithms that balance advertiser performance, user experience, and marketplace efficiency, owning systems end-to-end from problem formulation through production deployment and iteration. Core technologies include Python/Java/Go, Spark, Kafka, and large-scale real-ti
Senior Machine Learning Engineer at Reddit building scalable content-understanding models and signals to power ads, using NLP, LLMs, and ML pipelines for commercial intent and product detection.
A senior data scientist at Reddit designs identity resolution models, improves ad measurement methodologies, and enhances predictive performance for advertisers using statistical and machine learning techniques.
Lead a vendor-supported ad review program for Reddit’s growing ad business, improving efficiency, automation, and operational performance while aligning with sales and platform safety goals.