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Senior Data Scientist | Threat Intelligence Team

Nord Security

Full-time|On-site|Vilnius

Join the forefront of online security with Nord Security.As a passionate problem-solver, you have the opportunity to contribute to the development of Threat Protection Pro, the innovative NordLynx protocol, and the fastest VPN available. These cutting-edge tools empower users to reclaim their privacy, security, and control over their online presence.Your Role: Play a pivotal part in enhancing online safety for millions by providing timely insights into potential threats.Our Threat Intelligence Team is committed to delivering accurate intelligence on emerging threats to our product suite. Our diverse group of experts across Data Science, Malware Research, Development, and Privacy work collaboratively, harnessing feeds, heuristics, algorithms, and machine learning to achieve our common objectives.Key ResponsibilitiesDesign and implement innovative solutions by researching, debugging, and analyzing various data sources.Develop scalable and reliable code while creating documentation for your contributions.Research, develop, and deploy data science solutions into production environments.Customize machine learning metrics to monitor model performance effectively.Analyze validation and testing outcomes, interpret findings, and refine model designs.Coordinate deliverables with team members and conduct code reviews.Maintain open communication regarding project progress.Mentor junior team members and share knowledge across the team.Propose enhancements to existing solutions.

Apr 12, 2026
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QA Automation Engineer | Mid to Senior | NordVPN Apps

Nord Security

Full-time|On-site|Vilnius

Join the forefront of privacy and security technology.Are you a passionate problem-solver looking to make an impact? Become a vital part of our team at Nord Security, where we develop cutting-edge tools such as Threat Protection Pro and the NordLynx protocol, leading the way in VPN technology.Your role? Empower millions around the globe to reclaim their online security, privacy, and data integrity.Key ResponsibilitiesCrafting well-structured test cases and automating tests to uncover product issues related to feature implementation, behavior, and performance;Taking charge of the test automation process throughout release cycles;Conducting smoke and regression testing;Enhancing testing strategies for better outcomes;Collaborating with the development team during feature planning and estimation;Ensuring the product maintains high quality and is ready for deployment.Essential QualificationsA minimum of 3 years’ experience in software testing automation, with a solid understanding of OOP principles (C# is a plus);Proficiency in designing and automating test cases, along with familiarity with various testing techniques;Experience in smoke and regression testing, taking responsibility for automation during releases, including test maintenance;Ability to foresee potential bugs during feature planning;Detail-oriented, effective communicator who collaborates well within a team;Experience in automated testing of desktop applications would be a significant advantage.Tools You'll UtilizeFamiliarity with source control systems like Git;Experience with testing frameworks (Bonus: WinAppDriver, FlaUI, NUnit);CI/CD integration with GitLab, GitHub, or Jenkins;Proficiency in Visual Studio and related tools.

Apr 12, 2026
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Senior Automation QA Engineer at Saily | Warsaw

nord-security

Full-time|On-site|Warsaw

Join Saily, where we revolutionize connectivity for travelers. Say goodbye to roaming fees and plastic SIM cards. We offer lightning-fast, secure mobile data in over 200 destinations worldwide. With millions of paying customers and countless travelers using Saily at any moment, our mission is to enhance the travel experience.At Saily, we cultivate an AI-native Product Engineering culture that emphasizes:Engineers as builders responsible for end-to-end solutions, from concept to production.AI agents that empower engineers by automating repetitive tasks, allowing them to focus on impactful work.A collaborative environment where everyone is encouraged to suggest and implement improvements.A culture of curiosity, continuous learning, and knowledge sharing.Prioritizing customer satisfaction and ensuring a seamless journey for our users.We believe in prioritizing growth over comfort, contribution over hierarchy, and impact over process. At Saily, we empower talented individuals with the context, autonomy, and AI tools necessary to excel in their roles.Key Responsibilities:Design and implement robust test automation frameworks across multiple platforms, developing automated tests for complex functional integration, regression, and performance evaluations to ensure compliance with acceptance criteria.Contribute to the formulation and execution of testing strategies.Engage in the development of comprehensive test plans and test cases.Identify and document software defects, collaborating with the development team to resolve issues.Conduct hands-on exploratory and manual testing to identify edge cases and usability concerns that automated tests might overlook.Validate intricate user flows end-to-end across mobile and other platforms prior to major releases.AI Integration & Advocacy:Proactively explore and incorporate AI-driven tools into QA workflows to enhance test creation, broaden coverage, and minimize cycle times.Promote the adoption of AI-assisted testing methodologies throughout the engineering organization.Experiment with large language models (LLMs) and AI assistants to generate test data, develop test cases from requirements, and manage flaky tests.

Apr 12, 2026
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Product Owner | Mid-Senior | NordVPN

Nord Security

Full-time|On-site|Vilnius

Join the forefront of online security.Are you a dynamic and innovative problem-solver eager to shape the future of digital privacy? Become an integral part of the team behind Threat Protection Pro and the NordLynx protocol, delivering the fastest VPN solutions that empower users to regain control over their online security, privacy, and personal data.Your role? Make a significant impact on how millions of users protect themselves online.Key ResponsibilitiesLead the development of the NordVPN Mac application from initial discovery through to launch and ongoing iterations.Establish and communicate the vision and roadmap for the Mac product, transforming strategic objectives into actionable deliverables.Own and prioritize the product backlog, crafting precise requirements informed by data, user feedback, and stakeholder insights.Facilitate collaboration across engineering, design, research, marketing, and product teams to ensure alignment and successful execution.Analyze user and market insights, tracking feedback and trends to drive product improvements.Work closely with engineering to assess feasibility, manage dependencies, and mitigate blockers to ensure timely delivery.Champion a user-centric, data-informed approach to enhance user experience and application stability with each release.Define key performance indicators (KPIs) for the Mac application, monitoring outcomes to refine priorities as needed.

Apr 12, 2026
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QA Engineer (Manual-Automation) | Mid to Senior | NordVPN UCP

Nord Security

Full-time|On-site|Warsaw

Join the forefront of online privacy!At Nord Security, we are on a mission to empower individuals with the most advanced VPN technology and innovative solutions for online safety. As a part of our talented team, you will contribute to the development of our flagship products, including Threat Protection Pro and the NordLynx protocol, ensuring they meet the highest standards of security and user experience.Your Role: As a QA Engineer, you will play a crucial role in safeguarding our users' online security, privacy, and data integrity.The QA Team: Our dedicated QA department is committed to maintaining exceptional software quality. We are a collaborative team of over 30 professionals working on interconnected projects, fostering a culture of camaraderie, creativity, and continuous improvement. We value curiosity, innovation, and teamwork.Main Responsibilities:Develop and execute manual and automated tests to validate complex functional and integration requirements.Conduct functional testing for web, desktop applications, and back-end systems based on project needs.Maintain and enhance existing test cases to ensure continued effectiveness.Identify and document software defects while collaborating with multiple development teams for resolution.Engage with product managers, developers, and fellow QA team members to ensure high-quality deliverables.Implement Agile methodologies in daily tasks to enhance efficiency.Champion product quality within cross-functional teams.Contribute to the development of testing strategies and their execution alongside the QA Guild.Facilitate a smooth release process while upholding the highest quality standards.Mentor junior team members and share your insights and innovative ideas.

Apr 12, 2026
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Mid-Senior Web Designer for Cybersecurity Solutions

Nord Security

Full-time|On-site|Warsaw

Become a pivotal part of our talented Web Design team, where you will contribute to redefining the online presence of a leading global cybersecurity provider.We are seeking a skilled designer eager to enhance our web presence, driving user engagement and satisfaction. Your primary focus will be on creating visually appealing and user-friendly websites. You will work closely with our Marketing team on diverse projects, from global campaigns to new business initiatives. As a designer, you will also collaborate with copywriters, web content managers, design system specialists, graphic designers, and engineers to deliver exceptional websites that captivate audiences worldwide.Main ResponsibilitiesDesign web pages that promote user engagement and interaction, ensuring a seamless browsing experience.Evaluate existing website patterns and structures, identifying design and architectural flaws to recommend effective solutions and enhancements.Partner with marketing and product teams to ensure that web designs align with our brand identity and business goals, enhancing user engagement and conversion rates through comprehensive, user-centric strategies.Collaborate closely with UI/UX Designers, UX Researchers, and Design System designers.Champion design excellence by presenting and justifying your design decisions and their potential impact on growth metrics to stakeholders.Core RequirementsDemonstrated experience in web design, backed by a portfolio showcasing your ability to create engaging web pages.Outstanding visual and interaction design skills, with a strong attention to detail and a passion for crafting intuitive user experiences.A commitment to aligning design strategies with business objectives and user requirements.A collaborative mindset, capable of working with data analysts, web content managers, and developers to ensure the integrity of design and its implementation.A quick learner, adaptable to emerging technologies and changing project demands, receptive to feedback for continuous improvement.Excellent communication skills, with fluency in English.Proficiency in Figma.

Apr 12, 2026
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Senior Data Scientist - Threat Intelligence Team

Nord Security

Full-time|On-site|Warsaw

Join the forefront of online security with the world's leading VPN provider.If you are an inquisitive problem-solver eager to innovate, become a part of the team spearheading Threat Protection Pro, the NordLynx protocol, and the fastest VPN available—empowering users with enhanced privacy, security, and control over their data.Your contribution? Enabling millions to reclaim their online security, privacy, and data.Our Threat Intelligence team is committed to delivering precise and timely insights regarding potential threats to our products. Our diverse team of experts spans various disciplines, including Data Science, Malware Research, Development, and Privacy, all working towards a unified objective through the application of data feeds, heuristics, algorithms, and machine learning.Key ResponsibilitiesDesign and implement solutions to complex problems while conducting research, debugging, and data analysis across various sources;Create scalable, reliable code and document your contributions and explorations;Research, develop, and deploy data science solutions to production;Develop custom machine learning metrics to monitor model performance;Analyze validation/testing outcomes, provide explanations, and refine model designs accordingly;Collaborate with team members to plan deliverables;Perform code reviews to ensure quality;Maintain open communication regarding project progress;Mentor colleagues and share knowledge within the team;Propose enhancements to existing solutions.Core QualificationsDemonstrated experience in data science and/or mathematical modeling;Strong understanding of statistical methods (e.g., Monte Carlo, hypothesis testing, bootstrap, Bayesian inference);Extensive knowledge and practical experience with 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, etc.);

Apr 12, 2026
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Mid-Senior Software Engineer | Python Specialist

Nord Security

Full-time|On-site|Warsaw

Join the forefront of digital security with the world's most advanced VPN.As a passionate innovator and problem-solver, become part of the team that developed Threat Protection Pro and the NordLynx protocol—the fastest VPN globally. Our tools empower individuals by reclaiming their privacy, security, and control over their digital lives.Your Contributions: Play a pivotal role in helping millions regain authority over their online security, privacy, and data.Key Responsibilities:Design, develop, and sustain data curation and ingestion services tailored for the Threat Intelligence team.Collaborate on and implement robust architectural solutions, including distributed computing pipelines, microservices, and database integrations.Engage actively in code reviews, provide constructive feedback, and ensure top-notch technical documentation.Innovate and design new services to enhance data feed quality.Maintain adherence to coding standards, ensuring code is maintainable, readable, and secure, while fostering a results-oriented mindset.Continuously generate and discuss new ideas in the context of product development and cybersecurity.Offer technical guidance and leadership to team members.Essential Qualifications:Proficient in Python, with a strong grasp of core concepts, syntax, and data structures.Experience in designing microservice architectures and facilitating effective communication.Familiarity with data storage solutions, especially PostgreSQL.Ability to write clean, maintainable, and efficient code.Hands-on experience with cloud infrastructure technologies such as Docker and Kubernetes.Exceptional problem-solving skills with a knack for analyzing and resolving complex issues.Demonstrated capacity for rapid learning and proactive problem detection.Detail-oriented with a structured approach to research and implementation.

Apr 12, 2026
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Accelerated Career Path: Influencer Marketing Manager at Saily

Nord Security

Full-time|On-site|Vilnius

Join a Fast-Paced Cybersecurity Company with Rapid Hiring!At Nord Security, we understand that the cybersecurity landscape evolves quickly, and so does our recruitment process. As part of our Fast-Track initiative, you can expect a response within just one working day of your application. Zero delays mean a clear path to your next big milestone.About Saily: We are on the lookout for an enthusiastic Influencer Marketing Manager to spearhead our influencer campaigns, with a particular emphasis on YouTube. This role is ideal for individuals who thrive in data-driven environments, enjoy the dynamic world of digital marketing, and are passionate about collaborating with content creators.Key Responsibilities:Foster and maintain relationships with agencies, influencers, and content creators across YouTube, Instagram, and other social media channels.Identify potential influencers and negotiate rates to execute impactful campaigns.Manage paid social campaigns utilizing influencer-generated content (IGC), focusing on whitelisting, dark posting, and performance optimization.Conduct market research to devise strategies for entering new markets through influencer collaborations.Handle inbound leads and inquiries.Plan, execute, and monitor influencer marketing campaigns to meet established objectives and KPIs.Oversee account operations, including reporting, invoicing, budget tracking, and performance analysis.Innovate and brainstorm creative approaches for influencer campaigns.Stay informed about industry trends and developments.Collaborate with the marketing team to align strategies across various channels.

Apr 12, 2026
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Accelerated Career Path: Paid Search Specialist | Mid-Senior | Saily

Nord Security

Full-time|On-site|Vilnius

In the fast-paced world of cybersecurity, we understand the urgency of hiring. Join our Fast-Track initiative at Nord Security and receive a response within one business day of your application. Experience swift progress towards your next significant career achievement.Main ResponsibilitiesIndependently plan and forecast PPC activities in your area of responsibility.Ensure the exceptional quality of campaign setups and materials used.Monitor data quality across tracking points for discrepancies and promptly flag issues with relevant stakeholders.Manage multi-team projects by designing and implementing PPC campaign logic.Prioritize tasks proactively and align on deadlines and deliverables in accordance with business goals while providing guidance to junior team members.Conduct daily performance monitoring via platform interfaces, Google Analytics, and Looker for all team activities.Deliver clear and actionable reports on key metrics regularly and upon request, tailoring them to stakeholders' needs and presenting findings during team meetings.Stay updated with the latest PPC and marketing trends, sharing insights with the team to drive improvements.Core RequirementsAdvanced proficiency with ad platforms such as Google Ads and Bing (3+ years of proven experience).Thorough understanding of digital marketing metrics and the ability to articulate the relationships between them.Exceptional knowledge of various conversion setups and tracking points.Advanced familiarity with Google Analytics 4 reports, user interface, and the ability to utilize advanced filters and explorations.Proficient in Google Spreadsheets, capable of using advanced formulas and pivot tables.Excellent verbal and written communication skills in English.Ability to work effectively both independently and within a team, delivering results across diverse teams.Demonstrated experience managing large-scale and complex campaigns is essential.Experience with global campaigns....

Apr 12, 2026
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Senior Android Engineer | Kotlin | Saily

Nord Security

Full-time|On-site|Warsaw

Join Saily, where we simplify connectivity for travelers by eliminating roaming fees and plastic SIM cards. Experience secure, high-speed mobile data across 200+ destinations, serving millions of customers and countless travelers at any time.Our AI-native Product Engineering culture empowers engineers to take ownership from concept to production:The Engineer is the creator, addressing customer challenges comprehensively.AI Agents support engineers by automating repetitive tasks, enhancing their productivity.Innovation is a collective effort, with all team members encouraged to propose improvements and implement them.Curiosity and knowledge sharing are fundamental values.We never lose sight of our ultimate goal: ensuring customers enjoy a seamless and hassle-free journey.At Saily, we prioritize growth over comfort, contributions over hierarchy, and impact over rigid processes. We equip talented individuals with the context, autonomy, and AI tools necessary to excel in their roles.Your Key ResponsibilitiesCollaborate as a vital member of the Android development team, working with backend REST APIs, and providing insights tailored to mobile needs while collaborating with web, backend, and UX teams to innovate features and improve existing functionalities.Diagnose and rectify issues flagged by users and internal testing teams.Be a part of a dynamic team of Kotlin engineers and QA professionals.Stay abreast of the latest tools, patterns, and methodologies to ensure top-quality code.Lead the integration of AI technologies across the mobile platform and broader tech ecosystem, ensuring that AI-enhanced coding becomes a seamless part of our workflows.

Apr 12, 2026

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