Payroll · AI · Blockchain

Multi-Tenant Payroll System App

A complete AI-powered, blockchain-integrated payroll platform for modern HR and finance teams.

The Multi-Tenant Payroll System is a production-grade, modular payroll platform that combines AI, multi-tenant management, tax compliance, contractor payments, and blockchain-backed payroll execution. It’s designed for enterprises, SaaS providers, and agencies that want to offer secure, compliant payroll at scale — across brands, regions, and currencies.

Ideal buyers

Payroll SaaS providers, HR tech startups, enterprise HR/Finance teams, and consultancies building white-label payroll solutions.

Highlights

Multi-tenant payroll, AI-powered optimization, contractor payments, blockchain smart contracts, and modular Flutter packages.

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Overview

What the Multi-Tenant Payroll System does

This platform centralizes payroll for multiple companies and brands while keeping their data strictly separated. Each tenant can manage employees, contractors, benefits, and tax setups, with AI assisting on salary recommendations, fraud detection, and overtime cost optimization. Blockchain smart contracts can be attached to make execution and disputes tamper-resistant.

The problem it solves

Payroll at scale is complex: multi-entity structures, international workers, tax compliance, fraud risk, and manual reporting. Traditional solutions are either monolithic or locked into proprietary platforms. This system offers a **modular, Flutter-based alternative** with AI + Web3 hooks, so you can customize the exact features your organization or clients need.

Key features

Multi-tenant payroll engine with AI, tax, contractor payouts, and blockchain.

🏢 Multi-tenant payroll & setup

Business onboarding via flutter_setup_wizard_package.
Company & employee setup via flutter_company_wizard_package.
Employee & employer flows via flutter_employee_wizard and flutter_employer_wizard.
Role-based access and secure auth via flutter_auth_package.

💸 Payroll engine & compliance

Automated cycles with flutter_payroll_engine_package.
Tax compliance and forms via flutter_tax_compliance_package.
Custom payslips via flutter_payslip_package.
Advanced overtime rules via flutter_overtime_bonus_package.

🤖 AI & fraud detection

Fraud detection via flutter_ai_fraud_detection_package.
Salary prediction via flutter_ai_salary_prediction_package.
Overtime and cost optimization via flutter_ai_overtime_optimizer_package.
Proactive alerts for anomalies and budget risks.

👥 Employees, contractors & payouts

Employee self-service portal via flutter_employee_self_service_package.
Contractor/1099 flows via flutter_contractor_payments_package.
Stripe, PayPal, ACH, wires, and crypto via flutter_payment_gateway_package.
Financial reporting via flutter_financial_reports_package.

🏢 Multi-tenant admin & audit

Tenant-level controls via flutter_multi_tenant_package.
Approval workflows and audit via flutter_audit_logs_package.
Per-tenant dashboards and usage limits.
Exports for external auditors and regulators.

⛓️ Blockchain & Web3 integrations

On-chain payroll via payroll_execution_contract.sol.
On-chain fraud signals via fraud_detection_contract.sol.
Dispute resolution via payroll_dispute_contract.sol.
Web3 APIs: blockchain_verification_api.dart, crypto_payment_api.dart, smart_contracts_api.dart.

Architecture & project structure

Designed as a multi-tenant, package-based Flutter monorepo.

multi_tenant_payroll/
├─ apps/
│  └─ payroll_admin_app/          # Main Flutter app shell
│     ├─ lib/main.dart
│     └─ lib/app.dart
└─ packages/
   ├─ flutter_auth_package/
   ├─ flutter_setup_wizard_package/
   ├─ flutter_company_wizard_package/
   ├─ flutter_employee_wizard/
   ├─ flutter_employer_wizard/
   ├─ flutter_payroll_engine_package/
   ├─ flutter_tax_compliance_package/
   ├─ flutter_payslip_package/
   ├─ flutter_overtime_bonus_package/
   ├─ flutter_ai_fraud_detection_package/
   ├─ flutter_ai_salary_prediction_package/
   ├─ flutter_ai_overtime_optimizer_package/
   ├─ flutter_employee_self_service_package/
   ├─ flutter_contractor_payments_package/
   ├─ flutter_payment_gateway_package/
   ├─ flutter_financial_reports_package/
   ├─ flutter_multi_tenant_package/
   ├─ flutter_audit_logs_package/
   └─ web3_integration/           # contracts + Dart APIs

You can adopt the full monorepo or selectively license specific modules depending on your roadmap (e.g. AI-only, Web3-only, or core payroll engine only).

Tech stack

Flutter + Firebase + Web3, ready for global payroll workloads.

Layer	Technology
Frontend	Flutter (Dart), Material 3, adaptive layouts.
Backend	Firebase (Auth, Firestore, Storage, Functions) or pluggable REST/GraphQL APIs.
AI	External ML services or custom models for fraud, salary, and overtime.
Blockchain	EVM-compatible contracts for payroll, fraud, and disputes.
Payments	Stripe, PayPal, ACH/SEPA providers, optional crypto gateways.

Getting started (developer)

Spin up a dev instance of the payroll admin app.

# Clone the repo
git clone https://github.com/YOUR_ORG/multi_tenant_payroll.git
cd multi_tenant_payroll

# Install dependencies
flutter pub get

# Run the admin app
cd apps/payroll_admin_app
flutter run

Interested in the Multi-Tenant Payroll System?

Tell us about your payroll and HR use case, and we’ll walk you through architecture options, pricing, and rollout timelines.