Senior Data Scientist (ML)

We are seeking an experienced Mid/Mid+ Data Scientist with expertise in Large Language Models (LLMs) such as GPT, Claude, and related technologies to join our team in Ukraine. The ideal candidate will have a strong background in natural language processing (NLP), machine learning, and deep learning models. They will play a critical role in developing and deploying cutting-edge LLM applications to drive innovation across our product lines.

Responsibilities:

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Design, develop and optimize Large Language Models for various NLP tasks such as text generation, summarization, translation, and question-answering
Conduct research and experiments to push the boundaries of LLM capabilities and performance
Collaborate with cross-functional teams (engineering, product, research) to integrate LLMs into product offerings
Develop tools, pipelines and infrastructure to streamline LLM training, deployment and monitoring
Analyze and interpret model outputs, investigate errors/anomalies, and implement strategies to improve accuracy
Stay current with the latest advancements in LLMs, NLP and machine learning research
Communicate complex technical concepts to both technical and non-technical stakeholders

Requirements:

MS or PhD degree in Computer Science, Data Science, AI, or a related quantitative field
4+ years of hands-on experience developing and working with deep learning models, especially in NLP/LLMs
Expert knowledge of Python, PyTorch, TensorFlow, and common deep learning libraries
Strong understanding of language models, attention mechanisms, transformers, sequence-to-sequence modeling
Experience training and fine-tuning large language models
Proficiency in model deployment, optimization, scaling and serving
Excellent problem-solving, analytical and quantitative abilities
Strong communication skills to present technical information clearly
Ability to work collaboratively in a team environment
Fluency in Ukrainian and English

Preferred:

Research experience in LLMs, NLP, machine learning
Experience working with multi-modal data (text, image, audio)
Knowledge of cloud platforms like AWS, GCP for model training
Understanding of MLOps and production ML workflows
Background in information retrieval, knowledge graphs, reasoning

Senior Data Scientist (ML)

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