Data Scientist | Senior | Threat Intelligence team

The world’s most advanced VPN, and a whole lot more. 
If you’re a curious problem-solver who carves their own path, join the team behind Threat Protection Pro, the NordLynx protocol, and the fastest VPN on the planet—tools that put privacy, security, and control back in people’s hands.
Your impact? Helping millions take back control of their online security, privacy, and data. 
Our Threat Intelligence team is dedicated to providing accurate and timely information on potential threats to our products. Our team of skilled professionals from various fields, including Data Science, Malware Research, Development, and Privacy, are focused on achieving a common goal by utilizing feeds, heuristics, algorithms, and machine learning.

Main Responsibilities

• Design solutions to problems while researching, debugging, and analyzing data using different data sources;
• Create scalable & reliable code, as well as write documentation for the parts that you’ve contributed to or explored;
• Research, develop & deliver data science solutions to production;
• Develops custom ML metrics that would help to monitor model performance;
• Analyze validation/testing results, explain them, and improve model design accordingly;
• Plan the deliverables with the team members;
• Code reviews;
• Constant communication about the progress;
• Mentoring & knowledge sharing;
• Suggest improvements to current solutions.

Core Requirements

• Proven experience in data science and/or mathematical modeling;
• Solid knowledge of statistics (e.g., Monte Carlo, hypothesis testing, bootstrap, Bayesian inference);
• In-depth knowledge and hands-on experience in machine learning algorithms: linear regression, random forest, gradient boosted trees, neural networks, k-means, etc.;
• 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, make informed decisions about which tools and algorithms to use for specific problems;
• Team-driven mentality and ability to collaborate with other colleagues, as well as ownership;
• Willingness to explore, grow and mentor others while keeping up with the latest innovations in data science.

Salary Range

• Monthly gross salary from 17600 - 30000 PLN.

About Us Nord Security is a global leader in internet privacy and security solutions and Lithuania’s second tech unicorn. Established in 2012, Nord Security now has more than 1400 employees and serves millions of users worldwide. Our team has a global mission to shape a more secure and peaceful online future for people everywhere. With that in mind, we built several advanced cybersecurity solutions: NordVPN, NordLayer, NordLocker, NordPass, NordProtect, NordStellar, and Saily. NordVPN is the world’s most advanced VPN service provider, used by millions of internet users worldwide. NordVPN provides double VPN encryption and Onion Over VPN and guarantees privacy with zero tracking. One of the key features of the product is Threat Protection, which blocks malicious websites, malware, trackers, and ads. NordVPN is very user friendly, offers one of the best prices on the market, and has over 5,000 servers in 59 countries worldwide. And we’re always looking to expand our team of: • Future shapers • Restless achievers • Self-movers • Honest communicators • Team players What We Offer • Access to Nord Security products. We build solutions used by millions of users worldwide, and you’ll get to experience our products firsthand, at no charge;  • Professional growth. Internal and external events, online training, conferences, books - everything you need to reach full potential;  • Health benefits. Private health insurance, sports access card, online workouts, consultations, programs to improve mental health to feel and be your best; • Mental wellbeing. Access to mental health tools like Calm, Headspace, and Mindletic. Options for therapy to keep your emotional wellbeing in check;  • Team spirit. Team buildings and parties with games, shows, tastings, food coupons, gifts, and it’s on us;  • Additional paid leave. Additional days are covered by us in cases of illness or special occasions;  • Flexibility. Flexible working time arrangement. Kindly refer to our Privacy Notice for Recruitment Candidates for comprehensive information regarding our data handling procedures throughout recruitment processes: https://bit.ly/3urJdOL   About Us   Nord Security is a global leader in internet privacy and security solutions and Lithuania’s second tech unicorn. Established in 2012, Nord Security now has more than 1400 employees and serves millions of users worldwide. Our team has a global mission to shape a more secure and peaceful online future for people everywhere. With that in mind, we built several advanced cybersecurity solutions: NordVPN, NordLayer, NordLocker, NordPass, NordProtect, NordStellar, and Saily.   NordVPN is the world’s most advanced VPN service provider, used by millions of internet users worldwide. NordVPN provides double VPN encryption and Onion Over VPN and guarantees privacy with zero tracking. One of the key features of the product is Threat Protection, which blocks malicious websites, malware, trackers, and ads. NordVPN is very user friendly, offers one of the best prices on the market, and has over 5,000 servers in 59 countries worldwide.   And we’re always looking to expand our team of: • Future shapers • Restless achievers • Self-movers • Honest communicators • Team players   What We Offer   • Access to Nord Security products. We build solutions used by millions of users worldwide, and you’ll get to experience our products firsthand, at no charge;  • Professional growth. Internal and external events, online training, conferences, books - everything you need to reach full potential;  • Health benefits. Private health insurance, sports access card, online workouts, consultations, programs to improve mental health to feel and be your best; • Mental wellbeing. Access to mental health tools like Calm, Headspace, and Mindletic. Options for therapy to keep your emotional wellbeing in check;  • Team spirit. Team buildings and parties with games, shows, tastings, food coupons, gifts, and it’s on us;  • Additional paid leave. Additional days are covered by us in cases of illness or special occasions;  • Flexibility. Flexible working time arrangement.   Kindly refer to our Privacy Notice for Recruitment Candidates for comprehensive information regarding our data handling procedures throughout recruitment processes: https://bit.ly/3urJdOL
What We Offer
Innovate with industry leadersWork alongside global experts to build world-leading cybersecurity tools, impacting millions of users around the world.
Learn & growBoost your skills via our extensive training programs (online and offline) & other resources. Benefit from mentorship and career-switch opportunities to grow within the company. 
Hybrid workEnjoy the flexibility with 3 office days and working from home for the remaining 2.
Work from anywhereRecharge with a change of scenery – choose work from any location when you feel a need to power your creativity and drive. 
Physical well-beingFuel your active lifestyle with online workouts led by our Physical Well-Being experts. Unlock a variety of sports and wellness facilities, like gyms, swimming pools, and fitness classes, with the Multisport card.  
Mental & emotional healthNurture your mind with free psychologist consultations, dedicated mental health events, and premium access to top-rated wellness apps like Calm, Headspace, and Mindletic.
Premium healthcareReceive private health insurance giving you peace of mind for your health needs. Joyful moments – special treatsCelebrate life’s big moments with special gifts from us on your birthday, anniversary, and other major events, such as weddings or the arrival of a new family member. 
Company events & team-buildingExperience iconic Nord Security celebrations, team-buildings, and knowledge-sharing events, nurturing bonds that fuel our success.
WorkationEmbark on a legendary company getaway abroad, filled with exciting activities, live concerts, engaging workshops, and epic time together.
Kindly refer to our Privacy Notice for Recruitment Candidates for comprehensive information regarding our data handling procedures throughout recruitment processes: https://bit.ly/40GWyjL
We expect all candidates to provide accurate and complete information during the recruitment process. While limited use of AI tools to refine application materials is acceptable, candidates remain fully responsible for ensuring that their submissions reflect their own qualifications, skills, and experience. Any failure to do so may negatively affect participation in the recruitment process. If broader AI assistance is allowed for a particular role or stage, we’ll let you know in advance.
By submitting your application, you acknowledge that it may be processed using automated tools for evaluation purposes. As part of our recruitment process, we may use an AI-based application review tool to help assess applications based on skills and experience relevant to the role. This technology is used to support - not replace - human decision-making, and every application is ultimately reviewed by a recruiter.If you would like more information about how AI is used in this process or wish to exercise your rights under applicable data privacy laws, please contact us at privacy@nordaccount.com. Should you prefer to opt out of the automated evaluation, please submit your application directly to career@nordsec.com.