Applied AI Engineer
At a glance
Mid-level AI Engineering role at Fundamental. Remote, Israel · full-time.
Pay not stated Applied AI Engineer salary
remoteroles summary, based on the employer's posting.
What you'll do
- Help build and tune the Python-based neural network model for structured tabular data
- Profile model training and inference to find bottlenecks, then improve memory use, speed and throughput
- Move performance-critical work from Python into Rust, using C++ as a secondary option where appropriate
- Keep model changes reliable with tests, documentation, numerical checks and reproducible results
- Work with ML researchers to bring new capabilities into production and shape system architecture
What you bring
- Expert Python and Rust skills, with strong software engineering fundamentals
- Hands-on work connecting Python and Rust through PyO3, maturin or custom extensions
- Experience building and maintaining production ML models, plus a strong grasp of neural networks
- A track record optimizing critical code, with CPU, memory and latency profiling and debugging skills
Who this fits
This remote, mid-level role suits an engineer focused on performance-sensitive ML systems and close collaboration with researchers. The work is centered on Python and Rust, with C++ as a secondary option.
From the employer
About Fundamental
Fundamental is an AI research lab pioneering the future of enterprise decision-making. Our flagship model, NEXUS is the world's most powerful Large Tabular Model (LTM) - purpose-built for the structured records that contain trillions of dollars in business value. With $275m in funding from leading investors and trusted by Fortune 100 companies, Fundamental is 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 custom extensions)
Experience developing and maintaining ML models in production
Strong understanding of neural networks
Track record of optimizing performance-critical code
Strong profiling and debugging skills (CPU, memory, latency)
Nice to have
Experience with tabular ML approaches (transformers, tree/NN hybrids, learned embeddings)
Working proficiency in C++ and experience bridging Python and C++ (PyBind11, Cython, or custom extensions)
Familiarity with PyTorch internals or writing custom ops (Rust or C++)
Experience optimizing training loops, data pipelines, or inference engines
Background in numerical computing or systems programming
Exposure to large-scale ML infrastructure (distributed training, batching, caching)
Experience with the Rust async ecosystem (tokio) or SIMD/parallelism crates (rayon, ndarray)
Benefits
Competitive compensation with salary and equity
Comprehensive health coverage for you and your dependents
Paid parental leave for all new parents, inclusive of adoptive and surrogate journeys
Relocation support for employees moving to join the team in one of our office locations
A mission-driven, low-ego culture that values diversity of thought, ownership, and bias toward action
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