Senior Software Engineer (Fraud)

Quick Facts

• Role: Senior Software Engineer (Fraud)

• Team: Fraud Engineering / Fraud International Team (FIT)

• Work mode: Fully remote (Europe), location listed as Poland

Description

Own and deliver quarterly goals while leading engineers through ambiguity to solve open-ended fraud engineering problems. Design and implement real-time fraud decisioning services and APIs in Python or Kotlin, extending the Fraud Decisioning System into new international markets. Build repeatable platform tooling for faster, safer launches by integrating region-specific fraud/risk vendors and operationalizing AI/ML signals.

Responsibilities

• Deliver team goals and guide engineers through ambiguous, open-ended work

• Design and implement real-time fraud decisioning services and APIs

• Build and evolve tooling to scale market launch setup with low friction

• Integrate region-specific fraud and risk vendors

• Operationalize machine learning/AI signals that power real-time decisioning

• Collaborate with Product, Machine Learning, Analytics, and Fraud Strategy across the product development lifecycle

• Support operations and availability via metrics, escalation, and on-call/keep-the-lights-on

• Foster quality and ownership by setting/improving design standards and mentoring teammates

Requirements

• 5+ years building backend systems at scale using Python or Kotlin

• Distributed systems and infrastructure experience with AWS, MySQL/PostgreSQL, and Kubernetes

• Strong system design skills and a track record delivering maintainable, extensible services

• Fluency with AI-driven engineering (directing/orchestrating AI code generation and critically evaluating for correctness, quality, and security)

• Proficiency with SQL in data-rich environments

• Familiarity with CI/CD and safe production deployments

• Strong written and verbal communication skills for distributed teams

• Proactive, ownership-driven mindset with a focus on learning and team success

Benefits

• 100% subsidized medical coverage, dental, and vision for you and your dependents

• Monthly stipends for health, wellness, and tech spending

• Flexible Spending Wallets

• Away Days (wellness days)

• Learning & Development programs

• Parental benefits

• Employee Resource & Community Groups

• Potential equity rewards

• Creative tax benefits eligibility (subject to law and company policy)

Compensation

Base pay range: 308,000 zł – 428,000 zł per year (as provided). Equity grade: 4.