Fraud Prevention Engineer | Mid-Senior | NordVPN

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.About the RoleWe're hiring a Fraud Prevention Engineer to own the technical side of fraud prevention in our Payments team. You'll sit between fraud analysts and engineering — investigating how attacks happen, building defenses, and translating between both worlds. Think: root cause analysis, Cloudflare/Turnstile optimization, technical roadmap ownership, and enabling analysts with deeper technical capabilities. This is the first hire in what will become a dedicated fraud prevention engineering function.Main ResponsibilitiesInvestigate fraud attacks end-to-end — identify vectors, perform root cause analysis at the infra and application level, implement countermeasuresConfigure and optimize Cloudflare (WAF, bot management, rate limiting, Workers) and Turnstile challenge flowsAct as the technical bridge between fraud analysts, engineering, and product teamsAnalyze multiple attack vectors, plan and prioritize technical fraud prevention tasks on the roadmapBuild tooling, scripts, and queries that elevate the fraud analyst team's technical capabilitiesMaintain deep understanding of payment flows (authorization, 3DS, tokenization) and where vulnerabilities sitCore Requirements3+ years in fraud prevention, security engineering, or a technical role in paymentsJavaScript/TypeScript — comfortable with Cloudflare Workers, Turnstile, and browser-side challenge flowsBackend understanding — can navigate server-side codebases, trace API flows, and read system logsStrong SQL — joins, window functions, large transaction datasetsHands-on Cloudflare experience (WAF, bot management, rate limiting) or similar edge/CDN security platforms Ability to communicate technical findings to non-technical stakeholders and vice versaBonus pointsPython scripting for automation and data analysisExperience with log/observability tools (ELK, Grafana, Datadog)Background in application security or threat modelingFamiliarity with fraud platforms (Forter, Riskified, Sift) or in-house rule enginesGit workflow, CI/CD basicsWhat We OfferInnovate 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.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.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 hidden]>. Should you prefer to opt out of the automated evaluation, please submit your application directly to <[email hidden]>.