Senior Data Scientist

Who We Are:

Osmos, a B2B SaaS company founded by ex-Amazon ad-tech experts, is revolutionizing retail media with an AI-powered operating system that increases retailer profitability (by up to 7% of sales) and delivers superior ROAS for brands. By enabling Tier 1 retailers and marketplaces worldwide to activate more brands and leverage advanced targeting, we help them secure a lasting competitive edge.

Your Impact:

At , your ability to navigate the complexities of building scalable and high-performance systems, combined with your data science skills, will make you an invaluable contributor to our mission.

We are looking for a highly skilled Senior Data Scientist who can translate complex business problems into advanced analytical solutions. The ideal candidate combines deep expertise in statistical modeling, machine learning, and data engineering with a strong focus on Generative AI (GenAI), Large Language Models (LLMs), and Deep Learning.

This role requires both technical leadership and strategic vision from driving AI/ML innovation to mentoring junior team members, and collaborating across product, consulting, and engineering teams to bring AI-powered solutions to life.

By applying your expertise in data science to the ad-server and retail media domains, you will contribute to delivering targeted and impactful advertising campaigns, optimizing ad inventory, and maximizing ROI for and its clients.

What You'll Do:

At , your role in building ML algorithms for the ad server and retail media would involve the following:

Business Problem Solving

• While technical proficiency in data manipulation, statistical modelling, and machine learning is crucial, the ability to apply these skills to solve real-world business problems is equally vital
• Translate complex business challenges into analytical frameworks using statistical and ML methodologies.
• Apply AI/ML solutions to real-world business use cases across multiple industries.
• Extract insights from large-scale datasets to improve model accuracy, fairness, and relevance.

Technical Proficiencies:

• Strong expertise in statistical modelling, machine learning, deep learning, and NLP, with hands-on experience in LLMs and Generative AI (fine-tuning, RAG, prompt engineering).
• Proficiency in Python, PyTorch/TensorFlow, Hugging Face, and cloud-based ML platforms (AWS/GCP/Azure) with MLOps practices.
• Skilled in building scalable data pipelines and ML systems for training, evaluation, and deployment at scale.
• Solid grounding in Responsible AI principles including fairness and bias mitigation.

AI/ML & Generative AI Innovation:

• Lead the design, development, and deployment of scalable ML and DL solutions, with emphasis on LLMs and GenAI.
• Build training, fine-tuning, evaluation, and serving pipelines for LLMs across use cases like content generation, summarization, semantic search, personalization, and multimodal AI.
• Drive applied research, incorporating the latest in GenAI and foundation models into production-ready systems.
• Ensure solutions are optimized for performance, security, reliability, and cost.

You'll Thrive If You Have:

• A master's or doctoral degree in a relevant field such as computer science, statistics, mathematics, or data science is preferred. A strong academic background with coursework in machine learning, statistical modeling, data mining, and programming is valuable.
• 3-4 years of practical experience in data science, generative AI, machine learning, and analytics. Experience in relevant domains, such as e-commerce, advertising, or retail, may be advantageous.
• Minimum 1 years of deep, hands-on expertise in NLP, LLMs, and Generative AI.
• Advanced Proficiency in Python is essential for data manipulation, statistical analysis, and machine learning model development.

Core Skills:

• Strong foundation in machine learning, deep learning, and NLP.
• Hands-on experience with LLMs (GPT, LLaMA, Falcon, Mistral, etc.) and GenAI frameworks (LangChain, Hugging Face, RAG, fine-tuning, LoRA).
• Proficiency in Python, PyTorch/TensorFlow, SQL, and cloud platforms (GCP/AWS/Azure).
• Experience with MLOps frameworks (MLflow, Kubeflow, Vertex AI, SageMaker, etc.).
• Strong data engineering skills to build ETL pipelines for large-scale datasets.

Soft Skills:
Strong business acumen and ability to map AI/ML solutions to strategic goals.

Why Choose Osmos?

• Startup Energy, Enterprise Scale:
  Fast-paced innovation with global ambition
• Revolutionize Retail Marketing:
  Be at the forefront of AI-powered solutions
• Meaningful Contribution:
  Directly impacts major brands' success
• No Red Tape:
  Autonomy and empowerment to drive results
• Growth & Fun:
  Continuous learning in a vibrant, collaborative culture
• Competitive Rewards:
  We value your expertise and offer strong compensation