Perplexity · Engineering

Member of Technical Staff (Software Engineer, Fraud Prevention)

Perplexity is hiring for this role, remote in London. Posted October 23, 2026. You apply on Perplexity's own site.

Apply on Perplexity's siteAll Perplexity jobs
  • Not listedPay range
  • RemoteWork arrangement
  • Full-timeJob type
  • SeniorLevel (from the title)

How the pay compares

Perplexity doesn't publish a US-dollar range for this role. Across 686 open Software Engineer at AI Companies postings that do, the median is $286K and the middle half pay $226K–$356K.

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About the job

From Perplexity's job posting. Check the original for the latest details before applying.

About the role Perplexity's fraud prevention team protects our products, users, and infrastructure from fraud and abuse across the whole lifecycle: sign-up, authentication, payments, API usage, and product features. We build and operate a real-time decisioning platform together with the surrounding systems: data pipelines for detection and model training, integrations with product and payment systems, and internal tooling for investigation and response. As a software engineer on the team, you will own services end to end, from design to production operations, and work closely with fraud analysts, ML engineers, and product teams to make abuse expensive and legitimate usage frictionless.

Responsibilities

  • Design, build, and operate high-throughput, low-latency backend services for fraud detection and prevention
  • Build data pipelines and real-time feature computation that power detections and ML models
  • Collect and process trust signals
  • Integrate fraud decisions into product, auth, and payment flows across Perplexity
  • Own reliability of production services: observability, alerting, safe rollouts, incident response
  • Build internal tooling for investigation, enforcement, and auditability
  • Partner with fraud analysts to turn new abuse patterns into production detections quickly

Qualifications

  • 5+ years building and operating high-throughput, latency-sensitive backend systems in production
  • Strong systems programming skills; Rust, Go, or C++ experience preferred (we write Rust)
  • Hands-on experience with Kubernetes, Terraform and cloud infrastructure
  • Solid data fundamentals: stream/batch computations, caching and storage trade-offs
  • Pragmatic, ownership-driven approach: ship incrementally, measure, and make failures degrade safely

Nice to have

  • Fraud prevention, anti-abuse, or payments-risk domain experience
  • Experience serving ML models in production
  • Client-side experience (web or mobile) for signal collection

Apply on Perplexity's site

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