About the project

• Our client helps small teams power big businesses with the must-have platform for intelligent marketing automation. Customers from over 170 countries depend on the Client’s mix of pre-built automation and integration to power personalized marketing, transactional emails, and one-to-one CRM interactions throughout the customer lifecycle.
• We’re looking for a mission-driven Staff Data Scientist to join our client’s AI team and help shape the future of agentic systems in marketing. In this foundational role, you’ll architect scalable, intelligent solutions that democratize enterprise-level AI and put powerful tools into the hands of small and medium-sized businesses worldwide.
• You’ll be the first hire of your kind, laying the groundwork for AI strategy, infrastructure, and innovation in a high-impact environment. Working closely with Product and Engineering, you’ll turn cutting-edge research in generative and agentic AI into practical, production-ready systems. This is a rare opportunity to work on a true greenfield initiative, where your ideas and execution will directly influence the company’s AI vision and long-term product direction.
• Key takeaways:
• Stack: SQL, Python, AI/ML expertise, Cloud platform
• Salary: 34 000 - 37 000 PLN gross/month, Contract of employment
• Working model: Once a week in the office
• Location: Krakow, Fabryczna

Your responsibilities

• Design and implement a foundational AI data platform with a focus on scalability, reliability, and high performance.
• Build and deploy production-ready, autonomous systems that execute marketing strategies.
• Create robust MLOps pipelines for scalable model training, deployment, and continuous improvement.
• Prototype and operationalize cutting-edge machine learning models for marketing automation.
• Enhance large language model (LLM) capabilities through techniques such as RAG, fine-tuning, RLHF, and advanced evaluation methods.
• Research emerging AI technologies and apply academic innovations to real-world business use cases.
• Perform in-depth statistical analysis to uncover patterns and metrics that influence marketing success.
• Deliver complete data science products from concept to production.
• Develop quantitative metrics and visualizations that demonstrate return on investment for SMB clients.
• Translate complex AI outputs into actionable, results-driven marketing strategies.
• Collaborate with product and engineering teams to integrate AI solutions into scalable production systems.
• Mentor junior data scientists and engineers, promoting technical growth and innovation.
• Advocate for the AI platform's vision internally and externally within the AI and business communities.

Our requirements

• Proven experience in building and deploying advanced AI/ML solutions, particularly in agentic systems, natural language processing (NLP), or deep learning.
• Strong background in architecting scalable machine learning platforms and data pipelines capable of handling high-volume model training and inference.
• Expert-level Python skills (scikit-learn, TensorFlow, PyTorch, Hugging Face) for research and production use.
• Hands-on experience with Retrieval-Augmented Generation (RAG), model fine-tuning, Reinforcement Learning from Human Feedback (RLHF), and implementation of model evaluation frameworks and drift detection.
• Advanced SQL proficiency and solid understanding of data warehousing, ETL, and governance.
• Experience with cloud platforms (AWS, GCP, Azure) and distributed computing tools like Spark or Dask.
• Ability to turn complex technical insights into actionable business strategies and measurable value.
• Experience mentoring junior team members and working in cross-functional environments.
• Appreciation of the specific needs and constraints of SMBs, with a strong belief in democratizing access to advanced technology.
• Self-driven and focused on building scalable, reusable solutions that make an impact.
• A continuous learner mindset, keeping up to date with emerging AI research, and experimenting with its practical applications.
• Deep data intuition and a natural curiosity for uncovering patterns, correlations, and opportunities through rigorous data analysis.

Technologies we use

What we offer

• Full coverage for employees and their dependents through LUX MED. Employees have access to the “Premium” package, providing enhanced coverage and greater access to care.

• A client pays 100% of the premium for employees and 50% for dependents.

• No additional cost for dental coverage- integrated into LUX MED medical plan.

• Reimbursement for vision expenses up to 400 PLN every 2 years.

• Access to TELUS Health EAP to provide support and resources in a time of need.

• 10% annual bonus

• Vacation: 26 days.

• Home Office Stipend: One-time $150 equivalent home office stipend to outfit their home office.

• Calm Subscription: Premium subscription access to Calm, the #1 app for sleep, meditation, and relaxation.

• Hub Perks: Receive meal and transportation benefits when traveling to the Poland Hub.

• Baby Swag: If you have a baby or adopt, you’ll receive a company-branded first bath bundle.

• Sabbatical Program: After 5 years of employment, receive a month-long paid sabbatical leave, with a sabbatical leave bonus.