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April 10, 2026

Senior Data Scientist

Senior • Remote

Warsaw, Poland

Billennium is a global technology company with over 20 years of experience, committed to innovation and empowering businesses. As an employer, we offer a supportive, growth-focused environment where collaboration and creativity thrive. Join us to shape the future of technology together!

We are looking for a skilled Data Scientist to join an innovative AI initiative for a client in a highly regulated industry. The project focuses on transforming a periodic monitoring tool into a near real-time, daily intelligence platform

Key Responsibilities:

  • Ingestion Pipeline Development:
    Design, build, and maintain robust data pipelines using Python and cloud-based data platforms to ingest data from diverse sources such as RSS feeds, APIs, and web scraping.
  • Data Platform Architecture:
    Manage raw data structures and ensure seamless data flow between ingestion pipelines and downstream applications.
  • LLM Integration & Optimization:
    Implement and refine Large Language Models (LLMs) to categorize, summarize, and extract advanced insights (“Reasoning Modelling”) from unstructured data.
  • LLM Ops:
    Establish monitoring frameworks for model performance, including hallucination detection, and implement continuous improvement loops based on expert feedback.
  • Scalability & Automation:
    Support the transition to a fully automated 24-hour processing cycle within the data platform ecosystem.

 

Technical Skills & Qualifications:

  • Programming:
    Expert-level Python, particularly in data processing and AI orchestration.
  • Data Engineering:
    Strong experience building scalable ETL/ELT pipelines in modern data platforms.
  • AI / NLP:
    Hands-on experience with LLM frameworks and prompt engineering.
  • Web Data Ingestion:
    Proficiency in handling RSS feeds, APIs, and both structured and unstructured web data.
  • DevOps / LLM Ops:
    Familiarity with version control (Git) and deploying AI models into production environments.

Perks and benefits:

  • Comprehensive benefits - enjoy Udemy for Business, private medical care, Multisport card, veterinary package, language lessons, and shopping vouchers.
  • Flexibility - adaptable working hours and remote/hybrid work options to suit your lifestyle & location.
  • Career growth - access opportunities for professional development and learning, including perks related to our official partnerships with global IT giants: Microsoft, AWS, Snowflake, Salesforce & more.
  • Global collaboration - work with a diverse, international team.
  • Innovative environment - be part of a forward-thinking and growth-oriented workplace.
  • Engaging community – Work with passionate professionals and participate in team-building events, hackathons, and CSR initiatives to make an impact beyond work.
  • Team-building events including our company tradition (annual company event in Mazury).
  •  A pleasant surprise to start your journey with us in the form of a welcome pack.

 

Recruitment process:

  • HR call
  • Technical Interview
  • Interview with the dedicated Client
  • Final decision/ Feedback

 

Sounds interesting? Click "Apply" and have a chance to hear more!