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Senior Principal Machine Learning Engineer


Job Location:

Warsaw - Poland

Monthly Salary: Not provided by the employer
Posted: 10 July 2026 (30+ days ago)
Application Deadline: 7 October 2026
Vacancies: 1 Vacancy

Job Summary

  • Design develop and optimize scalable Machine Learning models for advertising intelligence and forecasting systems
  • Analyze large-scale historical and real-time datasets to improve forecasting accuracy and monetization strategies
  • Build and maintain distributed data processing pipelines using Spark and related Big Data technologies
  • Develop production-ready ML solutions using Python within AWS cloud infrastructure
  • Research evaluate and implement Machine Learning algorithms suitable for high-load AdTech environments
  • Improve model performance scalability reliability and operational efficiency
  • Collaborate with Data Engineers Product Managers and distributed engineering teams to deliver end-to-end ML solutions
  • Contribute to ML architecture decisions experimentation approaches and engineering best practices
  • Monitor validate and optimize ML model quality and forecasting performance in production environments
  • Produce technical documentation related to ML pipelines models and distributed systems
  • Mentor engineers and support technical growth within the team
  • Drive innovation in Machine Learning and AdTech technologies

Qualifications :

  • 6 years of commercial experience in Machine Learning and Big Data engineering
  • Strong hands-on experience with machine learning algorithms implementation using Python 
  • Proven experience with Apache Spark and large-scale distributed data processing
  • Experience working with distributed messaging systems such as Kafka
  • Strong knowledge of AWS cloud services and cloud-native architectures
  • Experience designing and developing large-scale distributed or mission-critical systems
  • Solid understanding of software engineering principles SDLC and Agile methodologies
  • Strong analytical thinking and problem-solving skills
  • Ability to work independently and take ownership of complex technical solutions
  • Good communication and collaboration skills
  • Upper-Intermediate or higher English level

WILL BE A PLUS:

  • Experience with Golang
  • Experience in AdTech online advertising or media platforms
  • Experience with forecasting systems or recommendation engines
  • Experience optimizing ML models for large-scale production environments

Remote Work :

Yes


Employment Type :

Full-time


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