Job Description

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 Role

We'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 responsibilities

Investigate fraud attacks end-to-end — identify vectors, perform root cause analysis at the infra and application level, implement countermeasures
Configure and optimize Cloudflare (WAF, bot management, rate limiting, Workers) and Turnstile challenge flows
Act as the technical bridge between fraud analysts, engineering, and product teams
Analyze multiple attack vectors, plan and prioritize technical fraud prevention tasks on the roadmap
Build tooling, scripts, and queries that elevate the fraud analyst team's technical capabilities
Maintain deep understanding of payment flows (authorization, 3DS, tokenization) and where vulnerabilities sit

Requirements

3+ years in fraud prevention, security engineering, or a technical role in payments
JavaScript/TypeScript — comfortable with Cloudflare Workers, Turnstile, and browser-side challenge flows
Backend understanding — can navigate server-side codebases, trace API flows, and read system logs
Strong SQL — joins, window functions, large transaction datasets
Hands-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 versa

Nice to have

Python scripting for automation and data analysis
Experience with log/observability tools (ELK, Grafana, Datadog)
Background in application security or threat modeling
Familiarity with fraud platforms (Forter, Riskified, Sift) or in-house rule engines
Git workflow, CI/CD basics

Company offers

Innovate with industry leaders Work alongside global experts to build world-leading cybersecurity tools, impacting millions of users around the world.
Learn & grow Boost 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 anywhere Recharge with a change of scenery – choose work from any location when you feel a need to power your creativity and drive.
Work in a next-gen Cyber City office Thrive in our bustling office, featuring ergonomic workspaces, modern meeting rooms, engaging events, and specialty coffee to fuel your day.
Physical well-being Boost your health with free-of-charge 24/7 gym access, onsite and online workouts, and consultations led by in-house Physical Well-Being experts.
Mental well-being Nurture your mind with free psychologist consultations, dedicated mental health events, and premium access to top-rated wellness apps like Calm, Headspace, and Mindletic.
Extra days off Enjoy additional vacation days off as you grow with us. Plus, get extra days for sick leave, special occasions, or parenting needs.
Premium healthcare Receive private health insurance giving you peace of mind for your health needs.