Senior Data Scientist

Senior Data Scientist

📍 Remote | 🕒 Core working hours: Polish time | 🌍 US-based clients

Code21 is a boutique AI & software development company with a proven track record of delivering cutting-edge data solutions across energy, mobility, and fintech sectors. We're scaling up our AI division and looking for a Senior Data Scientist to join our growing remote team.

Our clients are primarily based in the United States, and our delivery teams are spread between Europe and North America. We operate flexibly with core hours aligned to Polish time, with only minor time overlap with US stakeholders when needed.

What You'll Do

• Build and deploy production-grade ML and AI models for real-world applications

• Work with structured and unstructured data (sensor data, NLP, tabular data)

• Collaborate with engineers, analysts, and product teams on feature development

• Participate in architecture decisions and technical strategy

• Support model lifecycle management (monitoring, retraining, optimization)

What We’re Looking For

• 5+ years of hands-on experience in Data Science / Machine Learning

• Proficiency in Python, Pandas, NumPy, Scikit-learn, TensorFlow or PyTorch

• Experience with ML Ops tools (e.g. MLflow, DVC, Docker, Airflow)

• Solid knowledge of SQL and working with modern data warehouses (BigQuery, Snowflake)

• Proven experience with NLP, Time Series Forecasting, or Computer Vision

• Comfortable working in an agile and remote environment

• Strong communication skills in English (written and spoken)

Nice to Have

• Experience working with US-based clients or in distributed teams

• Knowledge of cloud platforms (GCP, AWS, or Azure)

• Experience with deep learning models in production

• Familiarity with data privacy and compliance standards

What We Offer

• Competitive compensation based on experience

• 100% remote work with flexible hours (core hours: 12:00–17:00 CET)

• Exposure to innovative projects and US-based customers

• Opportunity to work with a senior, talented, and diverse team

• Modern tech stack, clean architecture, and freedom to make engineering decisions

• Flat structure and founder access — your voice matters