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ML Researcher

Spain, Barcelona · Job Posted May 27, 2026
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Job Description

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.

Job Responsibility

  • Contribute to ideation, designing, implementing, and evaluating breakthrough Machine Learning models that will be deployed in the real world
  • Focus on the entire lifecycle of the models
  • Responsible for models’ performance including achieving high evaluation scores through novel architectures and training methods, establishing evaluation protocols, implementing methods for efficient training and inference
  • Ensure that research code allows swift, rapid development and testing of new ideas

Requirements

  • Strong familiarity with the full research cycle in Machine Learning
  • Strong fundamentals of software engineering
  • Strong knowledge of Python, and its ML frameworks
  • Experience with: Full lifecycle of AI model development
  • ML infrastructure frameworks and tools
  • Developing new ML methods, algorithms and models
  • GPUs (or TPUs) and distributed training
  • Scaling up models and training regimes
  • Knowledge of: Classical ML methods and algorithms
  • Deep Learning techniques

Nice to have

  • Expertise within one of the following areas is a strong bonus: Architecture Research, Distillation (Model Compression), Evaluation, Code Generation, LLMs
  • Experience with foundational models, e.g. LLMs
  • Published research at AI conferences
  • Contributions to open source ML projects
  • Experience working with tabular data / predictive analytics
  • High Kaggle rank
  • BSc/MSc/PhD in computer science/machine learning

What we offer

  • 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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