Data Scientist - Generative AI & LLM

Bitdefender

Bitdefender is a cybersecurity leader delivering best-in-class threat prevention, detection, and response solutions worldwide. Guardian over millions of consumer, enterprise, and government environments, Bitdefender is one of the industry’s most trusted experts for eliminating threats, protecting privacy, digital identity and data, and enabling cyber resilience. With deep investments in research and development, Bitdefender Labs discovers hundreds of new threats each minute and validates billions of threat queries daily. The company has pioneered breakthrough innovations in antimalware, IoT security, behavioral analytics, and artificial intelligence and its technology is licensed by more than 180 of the world’s most recognized technology brands. Founded in 2001, Bitdefender has customers in 170+ countries with offices around the world. For more information, visit https://www.bitdefender.com

Job Description:

As part of the Data Science team, you will develop and deploy models by leveraging the best tools and approaches to address business needs. You will experiment with different technologies and propose the best approaches to achieve your goals, working closely with the Data Analysis, Data Engineering, and Data Warehousing teams.

Responsibilities

• Engage in the full data science lifecycle: data collection and preprocessing, model tuning, deployment, and monitoring.
• Perform data-driven analyses and experiments to support modeling decisions and generate actionable insights.
• Stay informed on the evolving LLM ecosystem and methods to improve internal practices.
• Handle multiple projects independently, ensuring well-documented processes and clear decision records.

Experience requirements

• Hands-on experience with large language model (LLM) tools and frameworks for prompt optimization, retrieval-augmented generation (RAGs), agentic behavior, evaluation platforms, and orchestration (e.g. LangChain, Haystack, LlamaIndex).
• Applied experience with deep learning (e.g. PyTorch, TensorFlow), especially transformer-based architectures.
• Strong Python programming skills.
• Strong knowledge of statistics concepts (e.g. distributions, regression, statistical testing).
• Working knowledge of classical machine learning (ML) algorithms and their typical use cases.
• Willingness and ability to learn new mathematical and/or technical methods.

Education

• Bachelor’s or Master’s degree in computer science, statistics, engineering, or related fields.

Nice to have

• Experience in SQL operations and automating data workflows with specialized orchestration tools (e.g. Airflow).
• Capable of translating intricate technical ideas into intuitive terms, with a clear focus on how and why they work.