Fraud Prevention Engineer (Payments) - Edge Security

Nord Security; Poland; Remote; PLN 180,000 - 300,000; Full time

Benefits offered by this job

Premium healthcare

Work from anywhere

Company events & team-building

Job summary

Nord Security is hiring a Fraud Prevention Engineer to own the technical side of fraud prevention in our Payments team. You will sit between fraud analysts and engineering, investigating attacks, building defenses, and delivering a focused technical roadmap.

This first hire will help establish a dedicated fraud prevention engineering function. You will configure Cloudflare and Turnstile, perform root cause analysis, and build tooling to empower analysts.

Qualifications

• 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

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

Skills

JavaScript/TypeScript

SQL

Cloudflare

Fraud prevention

Backend

Tools

Cloudflare WAF

Turnstile

ELK

Datadog

Job description

Nord Security is hiring a Fraud Prevention Engineer to own the technical side of fraud prevention in our Payments team. You will sit between fraud analysts and engineering, investigating attacks, building defenses, and delivering a focused technical roadmap.

This first hire will help establish a dedicated fraud prevention engineering function. You will configure Cloudflare and Turnstile, perform root cause analysis, and build tooling to empower analysts.