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Rivac AI Labs
Vertical AI Solutions: Fintech, Retail, Real Estate & Manufacturing

Fraud Detection & Transaction Risk Scoring

Fraud doesn't announce itself, it hides inside transaction volume that's grown too large for a static rules engine or a manual review team to catch in real time. This service builds a machine-learning risk-scoring model trained on your actual transaction history, flagging account takeover, synthetic identity, card-testing, and first-party fraud before it clears, not after a chargeback lands. It's built for payments companies, lenders, and marketplaces where a fixed rules list keeps missing new fraud patterns while flagging too many good customers. The model runs alongside your existing fraud operations, giving your review team a ranked, explainable risk score instead of a flood of undifferentiated alerts. The result is fewer losses and fewer false declines on legitimate customers.

This is a capability we deliver for you as a service, not a role we’re hiring for.

How We’d Approach This

A clear, staged plan, not a black box

These are the service-specific steps inside our six-step process.

  1. 1

    Diagnose current fraud losses, false-positive rates, and the specific patterns your existing rules miss.

  2. 2

    Pilot the risk model against a sample of historical transactions with known outcomes to prove lift before it touches live traffic.

  3. 3

    Review scoring thresholds and false-positive tradeoffs with your fraud and compliance teams before go-live.

  4. 4

    Launch with a human-reviewed queue for borderline scores, then tune thresholds as real transaction data comes in.

What You Get

Deliverables from this engagement

  • Trained fraud risk-scoring model with documented feature set
  • Real-time scoring API integrated into your transaction flow
  • Explainable risk-score breakdown for every flagged transaction
  • Analyst review dashboard for borderline and high-risk cases
  • Monthly false-positive and catch-rate performance report

Six Ways We Could Architect This

Different engagement, different build, pick the shape that fits

There’s more than one way to deliver on this service. Browse a few of the ways we’d structure the work, depending on your speed, budget, and integration needs.

Read all 6 architectures as text

Lean Fast-Start Architecture

Data Input

  • Historical Transaction Export
  • Known Fraud Labels

Simple Model

  • Baseline Risk Scoring Model
  • Single Risk Score Output

Testing

  • Backtest Against Known Outcomes
  • Threshold Set Manually

Rollout

  • Shadow Scoring on Live Traffic
  • Analyst Spot Check
  • Score Added to Review Queue
  • Weekly Catch Rate Review
  • Basic Performance Notes
  • Plan for Live Enforcement

Cloud-Native / Managed Services Architecture

Data Layer

  • Transaction Stream
  • Cloud Data Warehouse

Managed ML Platform

  • Managed Feature Store
  • Managed Model Training Service
  • Model Registry

Scoring Layer

  • Real Time Scoring Endpoint
  • Explainability Service

Operations Layer

  • Analyst Review Dashboard
  • Managed Alerting Service
  • Model Performance Monitoring
  • Auto Retraining Pipeline
  • Monthly Performance Report

Event-Driven & Automation-First Architecture

Triggers

  • Transaction Initiated
  • Real Time Event Stream

Automation Layer

  • Auto Feature Computation
  • Auto Risk Score Generated
  • Score Above Threshold

Review Gate

  • Auto Hold for Review
  • Transaction Auto Approved
  • Analyst Queue Entry
  • Confirmed Fraud
  • Auto Block and Case Opened

Delivery

  • Transaction Log Updated
  • Daily Fraud Trend Report

Enterprise-Grade & Compliance-Ready Architecture

Governance Layer

  • Fraud Policy Framework
  • Regulatory Reporting Requirements
  • Model Risk Management Policy

Secure Scoring Layer

  • Access Controlled Scoring API
  • Role Based Analyst Access
  • Encrypted Transaction Data

Auditable Model

  • Model Version and Lineage Log
  • Score Explainability Record
  • Decision Audit Trail

Compliance Operations

  • Redundant Scoring Infrastructure
  • Independent Model Validation
  • Signed Off Compliance Report

AI-Augmented, Human-in-the-Loop Architecture

Input Layer

  • Live Transaction Data
  • Customer Behavior History

AI Scoring Layer

  • AI Risk Scoring Model
  • Ranked Risk Score
  • Explainable Risk Factors

Human in the Loop

  • Fraud Analyst Review Queue
  • Confirmed Fraudulent
  • Escalate to Senior Analyst
  • Human Approved Decision

Delivery

  • Transaction Blocked or Cleared
  • Case Outcome Logged
  • Model Feedback Loop Updated

Integration-Heavy / Ecosystem-Connected Architecture

Client Systems

  • Payment Processing Platform
  • Core Banking or Ledger System
  • Customer Support Platform

Risk Scoring Core

  • Real Time Risk Scoring Engine
  • Case Management System

Two Way Sync Layer

  • Chargeback System Sync
  • Compliance Reporting Sync
  • Finance Operations Team
  • Compliance Team

Shared Governance

  • Joint Review with Risk Committee
  • Published Risk Scoring Architecture
  • Ongoing Model Performance Review

More in Vertical AI Solutions: Fintech, Retail, Real Estate & Manufacturing

Ready to get started?

Tell us what you’re trying to get done and we’ll help you find the highest-leverage place to start, scoped small enough to prove itself before you commit to anything bigger.

Talk to us about Fraud Detection & Transaction Risk Scoring

Most engagements like this start as a $500–$2,500 pilot, see full pricing.

Questions? Book a free call