Senior Data Scientist (Machine Learning)

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.