Machine Learning Engineer

About LinotypeLinotype builds AI copilots that answer reader questions directly in articles, helping publishers retain audiences on their own sites. We're supported by Pear VC, Streamlined Ventures, 645 Ventures, and Hawktail.The RoleBuild and optimize the ML systems powering our AI platform. Work on RAG pipelines, embeddings, model fine-tuning, and inference optimization for production at scale.What You'll DoBuild multi-stage ad matching systems combining semantic retrieval with LLM-based relevance scoringDevelop ML pipelines for campaign feature extraction, model training, and real-time inferenceCreate agentic systems for campaign optimization, automated bidding, and advertiser assistanceDeploy models with safeguards for brand safety, performance targets, and publisher requirementsDesign and execute A/B tests to measure CTR, conversion rates, and revenue impactBuild monitoring dashboards and retraining loops driven by live campaign feedbackWhat We're Looking For3+ years in applied ML engineeringExperience with embeddings and LLMs for semantic matching and rankingA/B testing expertise and ability to measure business impact through experimentsProduction deployment experience with model serving, monitoring, and iterationStrong engineering fundamentals in algorithms, scalability, and system designImpact-driven mindset with care for advertiser ROI, publisher revenue, and user experienceNice to HaveBackground in advertising or recommendation systemsPublished work in ML or contributions to open-source projectsDomain knowledge in digital advertising or media platformsExperience with real-time inference optimization and low-latency model serving