Join our team as
Application Security Engineer · Senior
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.
Main Responsibilities
Ensure software design security and define secure implementation practices by syncing with teams responsible for the actual product development.
Ensure that security-related communication between technical teams involved in releasing the product is smooth (act as a “glue” between all teams so everyone’s on the same page);
Plan and manage development of security tools within the team;
Create tasks for the product's security reviews (SAST/DAST/SCA results, application security testing, etc.).
Cooperate with product teams to learn about changes introduced into the product early to make educated security decisions.
Ensure mobile/desktop applications and browser extensions are sufficiently tested.
Support internal and external audits;
Design and deliver training for security engineering awareness & adoption.
Actively look for internal security gaps within the product or organization overall.
Address security questions and give advice regarding the direction of the product's security.
Core Requirements
Proven experience in mobile/desktop applications security assessment: planning, testing, methodologies, and vulnerability reporting;
Good understanding of how networks work (OSI and TCP/IP models) with a particular focus on VPNs;
Experience working with stakeholders to define the scope of security tests and identify remediation actions to address any vulnerabilities identified;
Knowledge of secure coding practices;
Sense of ownership with strong problem-solving and investigation skills;
Experience with different OS (Linux, Android, iOS, macOS, Windows) security topics;
Ability to build and maintain relationships, influence key stakeholders across the business;
Ability to make product-related business decisions based on threats and vulnerabilities affecting it;
A healthy dose of assertiveness combined with an ability to compromise.
What we offer
🎓 Sharpen your edge
Growth is built into how we work. Extensive online and in-person training programs, access to platforms like Coursera and Skillshare, a mentorship program, and internal career moves when you’re ready for something new — your development has no ceiling here.
🌿 Take the time you need
Rest isn’t a reward — it’s part of the deal. Enjoy extra vacation days that grow with your time here, plus additional days off for sick leave, special occasions, and parenting.
🏥 Get premium healthcare
Your health shouldn’t be something you worry about. We provide premium private health insurance so you have peace of mind and fast access to care whenever you need it. Available in Lithuania and Poland.
🪷 Protect your peace
A peaceful mind isn’t a luxury — it’s the foundation. We provide free subscriptions to top-rated Calm, Headspace, and Mindletic apps, offer resilience and mindfulness trainings, and run dedicated mental health events.
🏋🏻 Own your fitness
Feeling good shapes how you work, think, and create. That’s why we offer in-house gyms, Multisport and Urban Sport cards, and online workouts. Need something tailored? Our Physical Well-Being experts are here with group mobility sessions, fitness guidance, and one-on-one consultations.
🌴 Pack your bags for workation
Picture this: the entire company flies out abroad. The days are packed with workshops, activities, concerts, and real time together. It’s legendary. If you’ve heard stories, they’re probably true.
✈️ Work from anywhere
New surroundings spark new thinking. When you need a reset, switch location and work from wherever keeps you sharp, creative, and in the zone.
🎁 Celebrate your milestones
The moments that make life special shouldn’t pass quietly. Birthdays, work anniversaries, weddings, new family members — each is marked with a special gift.
👶🏻 Parent with ease
When you’re a parent, the juggle is real. To make it smoother, we organize summer camps for the little ones and offer flexibility that lets you show up both for your family and your team.
🎉 Join the party
It never gets boring here. Get ready for team buildings that bring people closer, year-round company events that are equal parts educational and energizing, and the highlights everyone waits for — our iconic summer and winter celebrations.
⭐ Unlock Cyber City
Whether Vilnius-based or visiting from remote, our Vilnius HQ is fully yours to enjoy. Need focus? Silent room. Need energy? Open gyms. Need a break? Game room, music room, coffee bar. It’s a modern workspace built with your comfort in mind.
Kindly refer to our Privacy Notice for Recruitment Candidates for comprehensive information regarding our data handling procedures throughout recruitment processes.
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 [email protected]. Should you prefer to opt out of the automated evaluation, please submit your application directly to [email protected].
Congrats — we have received your application!
If your application is a good fit for our team, we’ll contact you directly.