Senior Data Scientist - Linear Optimization (Hybrid)

SmartRecruiters, Inc.; Kraków; Hybrid; PLN 196,000 - 270,000; Full time

Job summary

zooplus is seeking a Senior Data Scientist to join the Linear and Mixed Integer Optimization team in Kraków. You will design and implement optimization models to improve outbound logistics across a growing network handling millions of parcels weekly.

You will work in a cross-functional, Agile environment, use Python, Gurobi, and SQL, collaborate with engineering, product, and operations, and contribute to production-ready tools with a strong emphasis on performance and scalability.

Qualifications

• BS in Computer Science, Applied Mathematics, or another related field.
• 5+ years of hands-on experience solving linear optimization and mixed-integer problems.
• 2+ years of experience with commercial solvers (preferably Gurobi) for building and solving optimization models.
• Solid knowledge of advanced mathematical modeling techniques and experience with simulations.
• Proficiency in Python and scientific computing libraries such as Pandas, NumPy, and SciPy.
• Knowledge of relational databases and query authoring (SQL).
• Strong communication skills and the ability to explain complex technical concepts to non-technical stakeholders.
• Experience with Forecasting algorithms will be a plus; willingness to learn is equally valued.
• Team player with can do attitude; proactive in learning new skills and technologies.

Responsibilities

• Design, develop and maintain linear optimization and mixed integer models and integrate them in production.
• Analyze data, run simulations, and present actionable insights to stakeholders across engineering, product, and operations.
• Contribute to the full SDLC; from ideation and prototyping to deployment, monitoring, and continuous improvement.
• Ensure quality and performance of developed solutions through testing, validation, and monitoring in production.

Skills

Linear optimization

Gurobi

Python

Pandas

NumPy

SciPy

SQL

Communication skills

Forecasting

Education

Bachelor's degree in Computer Science, Applied Mathematics, or related field

Tools

Gurobi

SQL

Pandas

NumPy

SciPy

Job description

zooplus is seeking a Senior Data Scientist to join the Linear and Mixed Integer Optimization team in Kraków. You will design and implement optimization models to improve outbound logistics across a growing network handling millions of parcels weekly.

You will work in a cross-functional, Agile environment, use Python, Gurobi, and SQL, collaborate with engineering, product, and operations, and contribute to production-ready tools with a strong emphasis on performance and scalability.