LLM Research Scientist — Hybrid (Remote)

Giotto.ai; Lausanne; Hybrid; CHF 120,000 - 190,000; Full time

Job summary

Giotto.ai is a Switzerland‑based AI company seeking an LLM Research Scientist to design, train, evaluate, and improve advanced AI systems. You will work at the intersection of deep learning research, applied ML, and scalable engineering in a hands‑on role.

You will move from ambiguous questions to concrete hypotheses, experiments, and production‑ready methods in collaboration with engineering and product teams, staying current with AI research and translating ideas into practical experiments.

Qualifications

• Strong experience with Transformer architectures and modern sequence models.
• Python and PyTorch proficiency.
• Experience with Hugging Face ecosystem: transformers, datasets, tokenizers, model checkpoints, and generation APIs.
• Ability to design rigorous experiments and interpret results beyond headline metrics.
• Experience with large datasets and reproducible ML workflows.
• Strong mathematical foundations in linear algebra, probability, statistics, and optimization.

Responsibilities

• Define and execute research projects around LLMs, reasoning, multimodal models, synthetic data, and model adaptation.
• Design experiments to test hypotheses, compare architectures, evaluate training strategies, and measure model behavior.
• Train, fine‑tune, and evaluate Transformer‑based models using modern deep learning frameworks.
• Work on supervised fine‑tuning, preference optimization, LoRA/PEFT methods, distillation, data augmentation, and evaluation‑driven model improvement.
• Build robust benchmarks and diagnostic evaluations for reasoning, generalization, reliability, and task‑specific performance.
• Analyze model failures and propose improvements at the level of data, architecture, training objective, prompting, or inference strategy.
• Collaborate with ML engineers to scale experiments across GPUs and distributed infrastructure.
• Contribute clean, reproducible research code, experiment configs, documentation, and internal reports.
• Stay up to date with relevant AI research and translate promising ideas into practical experiments.
• Help shape the company’s research roadmap and identify high‑impact technical directions.

Skills

Deep learning

Transformer models

LLM training

Python

PyTorch

Hugging Face

CUDA‑enabled GPU training

Experiment tracking

Distributed training

Reproducibility

Tools

MLflow

Weights & Biases

Docker

GitLab CI

GCP / Cloud GPU

Ray

PyTorch Distributed

FSDP / DeepSpeed / Accelerate

PEFT / LoRA / QLoRA

vLLM

pytest

Job description

Giotto.ai is a Switzerland‑based AI company seeking an LLM Research Scientist to design, train, evaluate, and improve advanced AI systems. You will work at the intersection of deep learning research, applied ML, and scalable engineering in a hands‑on role.

You will move from ambiguous questions to concrete hypotheses, experiments, and production‑ready methods in collaboration with engineering and product teams, staying current with AI research and translating ideas into practical experiments.