TL;DR

Senior Data Scientist (Machine Learning): Designing, training, and optimizing large neural network models and business-driven ML solutions for the largest e-commerce system in Poland with an accent on scoring, ranking, and recommendation systems. Focus on translating complex business problems into data-driven solutions and building algorithms for advanced automated bidding systems.

Location: Remote or flexible hybrid from Gdynia, Kraków, Warszawa, or Rzeszów (Poland).

Salary: 140–170 PLN net/h + VAT (B2B contract)

Company

%hirify_global% creates highly specialized IT teams for clients globally, focusing on the human factor in IT.

What you will do

Design, train, and optimize neural network models for scoring, ranking, and recommendation systems.
Translate business problems into machine learning solutions and support product analytics.
Develop decision-support models and build algorithms for advanced automated bidding systems.
Impact the development of the largest e-commerce system in Poland.

Requirements

Strong background in mathematics, statistics, and data science.
Min. 5 years of commercial experience in ML, neural networks, or algorithmic modeling.
Experience in production ML environments.
Strong programming skills in Python, SQL, and Git.
Experience with orchestration tools (Airflow or similar) and basic Linux knowledge.
Excellent communication skills and ability to collaborate with business and product teams.

Culture & Benefits

Flexible work organization.
Opportunity to impact the development of a large e-commerce system used by millions.
Jit community with regular integration meetings.
Proprietary professional development programme.
Charitable and educational activities.