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Platform Engineer

CuspAI - Cambridge, England, United Kingdom - In-office - posted 2026-10-23

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CuspAI is a frontier AI company focused on using artificial intelligence to discover breakthrough materials for energy, clean water, advanced computing, and carbon capture. The founding team comprises world-class researchers in AI, chemistry, and engineering, and the company is building an AI-powered 'search engine' for next-generation materials discovery. As a Platform Engineer, you will architect and maintain the ML infrastructure platform that powers CuspAI's research teams. You'll be part of a newly created team reporting to the VP ML Engineering, with significant influence over the company's entire ML infrastructure strategy. Key responsibilities include: - Design and implement a cloud-native ML platform on Kubernetes that enables researchers to train, evaluate, and deploy models without infrastructure complexity - Build and maintain the complete MLOps stack: CI/CD pipelines, model registries, experiment tracking, and deployment automation - Architect distributed ML training infrastructure supporting multi-GPU workloads, with data pipelines, checkpointing, and resource optimization - Ensure 99.9% uptime through monitoring, alerting, and automated recovery systems - Manage complex multi-environment Kubernetes configurations using Kapitan - Optimize cloud spending and resource utilization while maximizing computational throughput - Create developer-friendly tools and abstractions enabling researchers to move from experiment to production - Collaborate closely with ML researchers, chemists, materials scientists, and software engineers Requirements: - Deep expertise in building and maintaining ML infrastructure (not model development), ideally in startup environments - Proven ability to work autonomously as a subject matter expert - Extensive experience with ML workloads on Kubernetes and multi-cloud platforms (AWS, GCP) - Strong Python and/or Go programming skills for infrastructure automation - Expert-level proficiency in Infrastructure as Code (Terraform, Helm, Kapitan, GitOps) - Experience operating distributed ML platforms for JAX and/or PyTorch - GPU infrastructure experience, specifically managing GPU clusters and performance optimization - Previous background as a Software Engineer before moving into DevOps/MLOps, or regular coding practice - Personal interest in AI applications for materials science and sustainability - Passion for enabling scientists to work on world-changing challenges Bonus qualifications: - Experience with Flyte, Kapitan, or Pants - HPC environment and job scheduler experience (Slurm, PBS) - ML serving infrastructure knowledge (Triton, TorchServe, KServe) - Scientific computing workflows and data management familiarity - Multi-tenant ML platform experience - Background supporting research teams

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