Data Scientist | Senior | Threat Intelligence Team

Details

At Nord Security, we’re creating a safer cyber future.

We help people and businesses take back control of their online security, privacy, and data. From VPNs to password managers, threat intelligence to eSIMs for travel—our teams turn complex problems into solutions trusted by millions worldwide.

Life is online. In this role, you’ll help people own it.

Our Threat Intelligence team is dedicated to providing accurate and timely information on potential threats to our products. The team includes professionals from Data Science, Malware Research, Development, and Privacy who use feeds, heuristics, algorithms, and machine learning to identify and mitigate threats.

Workplace: Hybrid — Warsaw, Poland

Responsibilities

• Design solutions to problems while researching, debugging, and analyzing data using different data sources
• Create scalable and reliable code, and write documentation for the parts you’ve contributed to or explored
• Research, develop and deliver data science solutions to production
• Develop custom ML metrics to help monitor model performance
• Analyze validation/testing results, explain them, and improve model design accordingly
• Plan deliverables with team members
• Perform code reviews
• Maintain constant communication about progress
• Mentor and share knowledge with colleagues
• Suggest improvements to current solutions

Requirements

• Proven experience in data science and/or mathematical modeling
• Solid knowledge of statistics (examples: Monte Carlo, hypothesis testing, bootstrap, Bayesian inference)
• In-depth knowledge and hands-on experience in machine learning algorithms (examples: linear regression, random forest, gradient boosted trees, neural networks, k-means, LLMs)
• Proficiency in Python and hands-on experience with the PyData stack (e.g., Pandas, Numpy, matplotlib) for analytics/machine learning
• Excellent problem-solving skills (researching, debugging, instrumentation)
• Ability to break down and prioritize work, and to choose appropriate tools and algorithms for problems
• Team-driven mentality, ownership, and collaboration skills
• Willingness to explore, grow, mentor others, and keep up with the latest innovations in data science

Compensation

• Monthly gross salary: 17,600 to 28,200 PLN

Additional information

• Team focus: Threat Intelligence (collaboration with Malware Research, Development, Privacy)
• Delivery expectations include production-ready solutions, monitoring/metrics, documentation, and code quality.