Data Scientist

October 24, 2026

Hybrid

Senior

Warszawa, Poland

Indeed

Keep in mind

Another language required
Polish · B2 level

Also worth knowing

English is required
B2 level

Description

Data Scientist role on one of the largest eCommerce platforms, where machine learning and data science are applied at scale to search and recommendations, customer service automation and fraud detection. The team takes solutions from prototypes to stable, high-performance services handling millions of requests per second, combining batch and stream processing over real big data in the public cloud. The position is based in Warsaw and follows a hybrid model of four days in the office and one remote day.

Responsibilities

Lead impactful projects from concept to productization, delivering insights and models that solve business problems
Work with diverse modeling techniques: gradient boosting, Bayesian frameworks, causal inference, optimization, deep learning and generative AI
Process terabytes of data using Google Cloud Platform solutions, working with tabular, natural language, image and time-series data
Take part in implementing both offline and online models
Partner with business stakeholders, analytics and data engineering teams
Contribute to peer mentorship and cultivate open knowledge sharing

Requirements

Proven production machine learning and SQL experience, including deploying and maintaining end-to-end models
Track record of designing and maintaining machine learning models in production environments
Ability to deconstruct ambiguous business challenges and translate them into well-defined ML problems
Exceptional communication skills to frame analytical questions and present findings clearly and compellingly
Strong coding and software engineering foundations with proficiency in Python
Familiarity with standard development workflows and tooling such as GitHub
Deep understanding of statistical concepts and core machine learning algorithms
Practical and theoretical grasp of Generative AI and agentic AI workflows, including prompting and validation
Genuine drive to use AI-assisted coding tools such as Copilot to automate everyday work
Degree in Mathematics, Physics, Computer Science, Economics or a related discipline, or equivalent hands-on experience
Fluency in Polish and English at minimum B2 level

Conditions

Salary range of 14 600–20 825 PLN on a contract of employment with tax-deductible cost
Annual bonus based on annual performance and company results
Flexible working hours with start between 7:00 and 10:00 in a hybrid model (4/1)
30 days of occasional remote work
Long-term discretionary incentive plan based on restricted stock units
16" or 14" MacBook Pro or a Dell with Windows and all necessary accessories
Cafeteria benefits plan covering medical, sports, lunch packages, insurance and purchase vouchers
Paid English classes related to the specific nature of the job
Training budget, internal learning platform, hackathons and inter-team tourism
Additional day off for volunteering
Social events such as Family Day and Advent of Code