Software Engineer for Fraud Prevention (TypeScript)
Apify Technologies s.r.o. • Prague, Prague, Czech RepublicJoin Apify on our mission to help anyone get more value from the web, so they can automate tasks and spend time on the things that matter most.
Apify downloads billions of web pages from all over the world for AI, market research, and finding lost children. We give chatbots the context to interact intelligently, and we’re making agents an integral part of the Apify platform.
Apify powers web automation and AI agents for thousands of developers and companies. With that scale comes abuse and fraud, and right now, we need someone who can take that problem head-on.
We're looking for an experienced Engineer to help us detect, prevent, and respond to fraud across the Apify platform. The challenge isn't just catching bad actors. It's doing it without slowing down the legitimate users who depend on us every day.
What you'll be working on:
Design and build systems for fraud prevention and remediation, balancing customer experience, losses, and implementation costs.
Build and refine risk models, rules, and signals that stop abuse in real time.
Investigate new attack patterns and deploy mitigations quickly.
Develop internal tools and processes to support incident response and investigations.
Work closely with Product, Security, and Finance to find the right balance between safety and user experience.
Document and share playbooks for common attack types so the whole team can learn from each incident.
Who we're looking for:
Hands-on experience in fraud prevention or trust & safety, ideally at scale. You've seen real attacks and know how to respond.
Strong engineering background with a focus on reliability and problem-solving.
Ability to analyze complex signals and turn them into actionable detection logic.
Comfortable doing data analysis and collaborating with the Apify data team.
Proactive and practical. You don't wait for someone to tell you what to fix.
A clear communicator who can explain trade-offs and document decisions.
Nice to have:
Familiarity with payment systems, chargebacks, or abuse prevention in SaaS/marketplaces.
Experience with identity, account integrity, or bot detection.
Our tech stack:
Frontend: React.js, styled-components, Storybook, Chromatic, Cypress, Playwright
Backend: TypeScript/Node.js, Nest.js, Next.js, Express.js, Docusaurus, Jest
Infra: AWS, Kubernetes, Helm, MongoDB, Redis, DynamoDB, S3, GitHub Actions
Monitoring: Grafana, Prometheus, Mezmo, Sentry, PagerDuty
Tools: GitHub, ZenHub, Notion, Google Workspace
Editor and AI assistant of your choice (GH Copilot, Cursor, Claude, Gemini, or JetBrains AI)
Process: two-week sprints, code reviews, tests, automating whatever we can, and deploying multiple times per day.
Expectations:
By the end of the first 3 months, we expect you to:
Understand the Apify platform end-to-end and ship your own Actor.
Ship your first detection rule or risk signal that's actively preventing fraud.
Build solid working relationships with the product team you'll be working with.
Identify the 3 highest-impact gaps in our fraud prevention and propose solutions.
By the end of the first 6 months, we expect you to:
Investigate fraud incidents independently.
Own at least two fraud vectors end-to-end (e.g. payments and account abuse).
Ship 3-5 detection improvements that measurably reduce fraud without hurting legitimate users.
Be a trusted partner to the Product team and the Data engineering/analytics team.
Present a clear roadmap for the next 6-12 months of fraud prevention work.
Why should you work at Apify?
Space, support, and autonomy for personal growth, with a direct impact on our success
Full-time position in Prague (Lucerna Palace) or Brno (Titanium) 🏰
Option to work remotely 🛋️
Flexible working hours (perfect for both night owls 🦉 and early birds 🐥)
Nobody counts holidays as long as the work gets done 💪
Stock options and profit sharing 💰
We welcome pets, kids, and bikes at the office 🐕👨👧
Epic team buildings and offsites 🚢 with biking, canoeing, and other adventures 🪂
Solid education and training budget, conference tickets, internal “Eat & Learn” sessions, and the possibility to work across teams 👩🏼💻👨🏽💻
Generous hardware budget 💻
Free lunches every day when you’re in the office 🌮🍱🍜🍕🥡
Unlimited supply of ☕ & 🍺 and snacks
Free entry to the wonderful Prague Zoo 🐘
Free Multisport card 🏋
Ping-pong, chess, PS5, lightsabers, foosball league after lunch.
For more details about Apify and what it is like to work with us, see our Careers page.