TL;DR

Data Scientist (Machine Learning): Designing, training, and optimizing advanced machine learning models for scoring, ranking, and recommendation systems with an accent on neural networks and business-driven ML solutions. Focus on translating complex business problems into data-driven solutions and building algorithms for decision and auction systems in a large e-commerce environment.

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

Salary: 100–130 PLN net/h + VAT (B2B contract)

Company

%hirify_global% is a Polish IT outsourcing company with over 700 experts, creating specialized teams for clients worldwide.

What you will do

Design, train, and optimize large neural network models for scoring, ranking, and recommendation systems.
Translate business problems into machine learning solutions, supporting product analytics and developing decision-support models.
Build algorithms for CPC pricing, ROAS strategy, bid prediction, dynamic pricing, and advanced automated bidding systems.
Contribute to the development of the largest e-commerce system in Poland, impacting over 20 million users.
Operate autonomously within micro-services based teams, focusing on software delivery at massive scale.

Requirements

Strong background in mathematics, statistics, and data science.
Proven commercial experience of at least 3 years in ML, neural networks, or algorithmic modeling.
Experience in production ML environments.
Strong programming skills in Python, SQL, and Git.
Experience with orchestration tools like Airflow and basic Linux knowledge.
Excellent communication skills and ability to collaborate with business and product teams.

Culture & Benefits

Impact on the development of the largest e-commerce system in Poland.
Flexible work organization.
Opportunities for professional development and a proprietary development program.
Access to the Jit community and regular integration meetings.
Contribution to charitable and educational activities supporting indigenous initiatives.