aimlroles

Senior Applied Research Engineer

Fundamental fundamental.tech Open · verified Oct 22, 2026
On-site Barcelona Full-time Senior AI Research

At a glance

Senior AI Research role at Fundamental. Barcelona · full-time.

Pay not stated AI Research salary

RoleAI Research
SenioritySenior
LocationBarcelona
WorkplaceOn-site
EmploymentFull-time
PostedMar 25, 2026 · 7mo ago
Role brief

aimlroles summary, based on the employer's posting.

What you'll do

  • Profile distributed training runs to find limits in compute, GPU memory and communication between GPUs
  • Shape training-system design, improving efficiency and reliability and writing Triton or CUDA kernels when needed
  • Build scaling, parallelization and memory approaches for training models with very large context windows
  • Work with ML researchers to diagnose inefficient architectures and make research ideas scale in practice
  • Prepare models for serving and improve inference speed through methods such as quantization

What you bring

  • You understand current machine-learning architectures and large-scale training pipelines
  • You have run distributed training across systems with multiple GPUs
  • You can profile and debug CPU, GPU, memory, latency and inter-GPU communication issues
  • You program strongly in Python and know model scaling approaches such as tensor and pipeline parallelism

Who this fits

This senior applied research engineering role suits someone focused on training efficiency and model serving who can work closely with ML researchers. The role is onsite in Barcelona, Spain.

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

  • Profile end-to-end distributed training runs to identify bottlenecks across compute, GPU memory, and inter-GPU communication

  • Contribute to architectural decisions that improve the efficiency and reliability of large-scale training jobs, including developing Triton/CUDA kernels when needed

  • Design and implement model scaling, parallelization, and memory optimization techniques for training workloads with very large context sizes

  • Collaborate closely with ML Researchers to diagnose architectural inefficiencies, ensure new research ideas scale efficiently in practice, and spread internal knowledge about model efficiency and optimization

  • Drive the productionization and serving of our models from the research side, including improving inference efficiency through techniques such as quantization

Must have

  • Strong understanding of modern ML architectures and large-scale training pipelines

  • Experience running distributed training jobs on multi-GPU systems

  • Advanced profiling and debugging skills across CPU, GPU, memory usage, latency, and inter-GPU communication

  • Strong programming skills in Python

  • Experience with model scaling and parallelization strategies, including tensor and pipeline parallelism

Nice to have

  • Familiarity with NCCL, MPI, and distributed communication primitives

  • Knowledge of PyTorch and Triton internals

  • Programming experience with C++ and CUDA

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