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Senior Machine Learning Engineer, ML Platform

Cash App

Salary not specified
Dec 2, 2025
San Francisco, CA, US
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Block is looking for an experienced Machine Learning Engineer to join their ML Inference & Training team to build and improve ML infrastructure, platforms, and libraries that enable applied ML teams across Block to develop, productionize, and observe ML models at scale.

Requirements

  • Deep understanding of architectures for ML-backed solutions and the ML lifecycle - from data gathering, training, model evaluation, MLOps, and productionizing models (both classical ML and deep learning/LLMs)
  • Ability to produce production-quality code and services incorporating testing, evaluation, monitoring as well as the ability to quickly adapt to a new domain, hack MVP's, and iterate to improve product
  • Experience using any of the major cloud vendors for high scale production use cases
  • Golang, Python, TypeScript, React
  • gRPC, Protocol Buffers
  • AWS (Sagemaker, EC2, EKS), Databricks
  • NVIDIA Triton, vLLM, ONNX

Responsibilities

  • Develop scalable ML/AI systems and platforms
  • Be on the cutting edge of advancements in ML/AI across the industry
  • Collaborate across diverse teams to deliver impactful platform solutions by understanding and generalizing the problems of cross-functional stakeholders
  • Support critical ML systems used for fraud detection, language models, recommendation systems and underwriting
  • Influence our roadmap and ensure we're working on the highest impact problems within the ML infrastructure domain

Other

  • 8+ years of experience in software development and/or machine learning experience with a focus on internal platforms or infrastructure
  • A desire to understand our clients' needs in order to design tools and systems that solve our customer's problems. As a platform team, our main customers are internal developers and products
  • Strong communication skills (verbal and written) with technical and non-technical stakeholders
  • We value general and versatile engineering skill over specific experience with our current stack
  • Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class.