Applied AI Engineer

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About this role

Applied AI Engineer Europe, United States, Israel (remote) About Fundamental Fundamental is an AI company pioneering the future of enterprise decision-making. Founded by DeepMind alumni, Fundamental has developed NEXUS - the world's most powerful Large Tabular Model (LTM) - purpose-built for the structured records that actually drive enterprise decisions. Backed by world class investors and trusted by Fortune 100 companies, Fundamental unlocks trillions of dollars of value by giving businesses the Power to Predict. At Fundamental, you'll work on unprecedented technical challenges in foundation model development and build technology that transforms how the world's largest companies make decisions. This is your opportunity to be part of a category-defining company from the ground-up. Join the team defining the future of enterprise AI. Key responsibilities - Take part in development and optimization of a large neural network-based tabular model implemented in Python - Profile training and inference pipelines to identify performance bottlenecks - Rewrite critical components in Rust (via PyO3 or custom extensions) where Python limits us, with C++ (via PyBind11 or custom extensions) as a secondary option where appropriate - Improve memory efficiency, latency, and throughput across model pipelines - Ensure correctness, numerical stability, and reproducibility as the model evolves - Collaborate with ML researchers on productionizing new capabilities - Maintain clean abstractions, comprehensive tests, and clear documentation - Shape architectural decisions for our ML systems handling tabular data Must have - Strong software engineering fundamentals with expert-level Python and Rust - Hands-on experience bridging Python and Rust (PyO3, maturin, or

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