Senior Machine Learning Engineer (Growth)

This role sits on the Engagement ML team within Discord's Growth organization, working as part of a cross-functional Onboarding squad. The focus is building end-to-end recommendation and personalization systems that help new users find relevant servers, people, and content, especially addressing cold-start scenarios with limited user history. The engineer will work across candidate generation, ranking, online serving, and shared infrastructure like user and server embeddings, while collaborating with the broader team on roadmap decisions.

• 5+ years of experience in machine learning, data science, or applied science with a track record of shipping recommendation or personalization systems end to end. Hands-on experience with modern recommendation system components such as retrieval/ranking pipelines, embedding-based retrieval (e.g. two-tower models), and deep learning architectures (transformers, multi-task learning). Strong Python skills and experience with ML frameworks like PyTorch, JAX, or TensorFlow. Experience deploying ML systems to production at scale, including feature pipelines, serving, monitoring, and experimentation. Strong product sense and communication skills for cross-functional collaboration.