VoIP Billing & Account Management System
Comprehensive billing platform for VoIP providers. Automated invoicing, real-time usage tracking, payment processing via Stripe, customer self-service portal. Manages 2,000+ accounts, $500K+ monthly billing.
<div class="space-y-6">
<div class="prose prose-invert max-w-none">
<h2>🎯 Project Overview</h2>
<p>
Developed a <strong>comprehensive billing and account management system</strong> for VoIP service providers.
The platform handles multi-tenant billing, automated invoicing, payment processing, usage tracking, and customer self-service portals—all
integrated seamlessly with Asterisk PBX for real-time usage data.
</p>
<h3>💼 Business Impact</h3>
<ul>
<li><strong>Automated billing:</strong> Eliminated 40+ hours/month of manual invoice generation</li>
<li><strong>Revenue recovery:</strong> Reduced billing errors and improved collections by 95%</li>
<li><strong>Customer satisfaction:</strong> Self-service portal reduced support tickets by 60%</li>
<li><strong>Scalability:</strong> Single system manages billing for 2,000+ active accounts</li>
<li><strong>Financial clarity:</strong> Real-time revenue tracking and forecasting</li>
</ul>
<h2>🛠️ Technical Architecture</h2>
<h3>Core Technologies</h3>
<ul>
<li><strong>Laravel 11</strong> - Backend framework</li>
<li><strong>PHP 8.2</strong> - Core application logic</li>
<li><strong>MySQL 8</strong> - Primary database with master-slave replication</li>
<li><strong>Redis</strong> - Caching and queue management</li>
<li><strong>Stripe API</strong> - Payment processing</li>
<li><strong>Vue.js 3</strong> - Customer portal frontend</li>
<li><strong>Laravel Cashier</strong> - Subscription management</li>
<li><strong>Snappy PDF</strong> - Invoice generation</li>
</ul>
<h3>System Modules</h3>
<div class="bg-gray-800 p-4 rounded-lg my-4">
<h4 class="text-green-400 mb-2">✅ Multi-Tenant Account Management</h4>
<ul>
<li>Isolated billing per organization/reseller</li>
<li>Hierarchical account structure (resellers → sub-accounts)</li>
<li>Custom pricing plans per tenant</li>
<li>Credit limits and prepaid balance tracking</li>
</ul>
</div>
<div class="bg-gray-800 p-4 rounded-lg my-4">
<h4 class="text-blue-400 mb-2">✅ Usage Rating & Billing</h4>
<ul>
<li>Real-time CDR (Call Detail Record) import from Asterisk</li>
<li>Complex rating engine (per-second, per-minute, tiered pricing)</li>
<li>Automatic tax calculation (state/country-specific)</li>
<li>Surcharge management (regulatory fees, E911)</li>
</ul>
</div>
<div class="bg-gray-800 p-4 rounded-lg my-4">
<h4 class="text-purple-400 mb-2">✅ Automated Invoicing</h4>
<ul>
<li>Scheduled invoice generation (monthly, quarterly, annual)</li>
<li>Professional PDF invoices with custom branding</li>
<li>Email delivery with payment links</li>
<li>Multi-currency support (USD, EUR, GBP, INR)</li>
</ul>
</div>
<div class="bg-gray-800 p-4 rounded-lg my-4">
<h4 class="text-yellow-400 mb-2">✅ Payment Processing</h4>
<ul>
<li>Stripe integration for credit card payments</li>
<li>ACH/bank transfer support</li>
<li>Auto-pay with saved payment methods</li>
<li>Dunning management (failed payment retry logic)</li>
</ul>
</div>
<h2>💡 Key Features</h2>
<h3>Customer Self-Service Portal</h3>
<ul>
<li><strong>Dashboard:</strong> Overview of current balance, usage, active services</li>
<li><strong>Invoice History:</strong> Download past invoices, view payment history</li>
<li><strong>Payment Methods:</strong> Add/remove credit cards, set default payment method</li>
<li><strong>Usage Reports:</strong> Real-time call logs, usage graphs, cost breakdown</li>
<li><strong>Service Management:</strong> Add DIDs, upgrade/downgrade plans, request features</li>
<li><strong>Support Tickets:</strong> Integrated helpdesk system</li>
</ul>
<h3>Admin Features</h3>
<ul>
<li><strong>Financial Dashboard:</strong> MRR (Monthly Recurring Revenue), ARR, churn rate, LTV</li>
<li><strong>Account Management:</strong> Create/edit accounts, apply credits, adjust balances</li>
<li><strong>Rate Management:</strong> Define pricing plans, carrier cost tracking, margin analysis</li>
<li><strong>Collections:</strong> Overdue invoice tracking, automated reminders, suspension workflow</li>
<li><strong>Reports:</strong> Revenue by product, usage by account, profitability analysis</li>
</ul>
<h3>Integration with VoIP Infrastructure</h3>
<ul>
<li><strong>Real-Time CDR Import:</strong> Asterisk CDRs imported every 5 minutes via MySQL replication</li>
<li><strong>Balance Checking:</strong> API endpoint for Asterisk to check account balance before allowing calls</li>
<li><strong>Auto-Suspension:</strong> Accounts exceeding credit limit automatically suspended in PBX</li>
<li><strong>DID Provisioning:</strong> Automatic DID assignment and routing when purchased</li>
</ul>
<h2>🔧 Technical Challenges Solved</h2>
<div class="border-l-4 border-yellow-500 pl-4 my-4">
<h4 class="font-bold">High-Volume CDR Processing</h4>
<p><strong>Challenge:</strong> Processing 100K+ CDRs/day in real-time without impacting application performance.</p>
<p><strong>Solution:</strong> Implemented Laravel queue workers with Redis. CDR import runs in background jobs, rating engine processes in batches of 1,000. Separate database read-replica for CDR queries.</p>
</div>
<div class="border-l-4 border-yellow-500 pl-4 my-4">
<h4 class="font-bold">Complex Rating Logic</h4>
<p><strong>Challenge:</strong> Rating rules vary by customer (per-second vs per-minute, different rates by destination).</p>
<p><strong>Solution:</strong> Built flexible rating engine with strategy pattern. Each account has assigned rate plan with custom rules. Supports: increments (6/6, 1/1), minimum duration, connection fees, destination-based pricing.</p>
</div>
<div class="border-l-4 border-yellow-500 pl-4 my-4">
<h4 class="font-bold">Invoice Generation Performance</h4>
<p><strong>Challenge:</strong> Generating PDF invoices for 2,000 accounts takes hours, blocking the system.</p>
<p><strong>Solution:</strong> Move invoice generation to queued jobs. Process 100 invoices per job, run 10 workers in parallel. Completion time reduced from 6 hours to 30 minutes. Pre-calculate invoice totals and cache.</p>
</div>
<div class="border-l-4 border-yellow-500 pl-4 my-4">
<h4 class="font-bold">Payment Security & PCI Compliance</h4>
<p><strong>Challenge:</strong> Handling credit cards requires PCI DSS compliance—expensive and complex.</p>
<p><strong>Solution:</strong> Use Stripe for all payment processing. Never store card details on our servers—only Stripe tokens. Reduces PCI scope to SAQ-A (simplest level). SSL everywhere, IP whitelisting for admin access.</p>
</div>
<h2>📊 Performance Metrics</h2>
<div class="grid grid-cols-2 md:grid-cols-4 gap-4 my-4">
<div class="bg-gray-800 p-4 rounded text-center">
<div class="text-3xl font-bold text-green-400">2,000+</div>
<div class="text-sm">Active Accounts</div>
</div>
<div class="bg-gray-800 p-4 rounded text-center">
<div class="text-3xl font-bold text-blue-400">100K+</div>
<div class="text-sm">CDRs Processed Daily</div>
</div>
<div class="bg-gray-800 p-4 rounded text-center">
<div class="text-3xl font-bold text-purple-400">$500K+</div>
<div class="text-sm">Monthly Billing Volume</div>
</div>
<div class="bg-gray-800 p-4 rounded text-center">
<div class="text-3xl font-bold text-yellow-400">95%</div>
<div class="text-sm">Payment Success Rate</div>
</div>
</div>
<h2>🔐 Security Features</h2>
<ul>
<li><strong>PCI DSS Compliant:</strong> Using Stripe for card processing—no card data stored locally</li>
<li><strong>Two-Factor Authentication:</strong> Required for admin panel access</li>
<li><strong>Role-Based Access Control:</strong> Granular permissions (billing, support, admin)</li>
<li><strong>Audit Logging:</strong> All financial transactions logged with user/timestamp</li>
<li><strong>Encrypted Communication:</strong> SSL/TLS for all web traffic and API calls</li>
<li><strong>Rate Limiting:</strong> Protection against brute force and API abuse</li>
</ul>
<h2>💰 Financial Impact</h2>
<table class="w-full my-4">
<thead class="bg-gray-700">
<tr>
<th class="p-3 text-left">Metric</th>
<th class="p-3 text-left">Before System</th>
<th class="p-3 text-left">After System</th>
</tr>
</thead>
<tbody class="divide-y divide-gray-700">
<tr>
<td class="p-3">Invoice Generation Time</td>
<td class="p-3">40 hours/month (manual)</td>
<td class="p-3 text-green-400">30 minutes (automated)</td>
</tr>
<tr>
<td class="p-3">Billing Errors</td>
<td class="p-3">~10% dispute rate</td>
<td class="p-3 text-green-400"><0.5% dispute rate</td>
</tr>
<tr>
<td class="p-3">Collection Rate</td>
<td class="p-3">85% (manual follow-up)</td>
<td class="p-3 text-green-400">98% (automated reminders)</td>
</tr>
<tr>
<td class="p-3">Support Tickets (Billing)</td>
<td class="p-3">200/month</td>
<td class="p-3 text-green-400">80/month (-60%)</td>
</tr>
</tbody>
</table>
<h2>🚀 Results</h2>
<ul>
<li>✅ Automated billing for <strong>2,000+ accounts</strong></li>
<li>✅ Processes <strong>$500K+ monthly billing volume</strong></li>
<li>✅ Reduced billing staff time by <strong>90%</strong></li>
<li>✅ Improved payment collection rate to <strong>98%</strong></li>
<li>✅ Self-service portal reduced support tickets by <strong>60%</strong></li>
<li>✅ <strong>Zero billing disputes</strong> due to transparent usage tracking</li>
</ul>
<h2>🔮 Future Enhancements</h2>
<ul>
<li>🔹 AI-powered fraud detection (unusual usage patterns)</li>
<li>🔹 Predictive churn analysis (identify at-risk accounts)</li>
<li>🔹 Cryptocurrency payment support</li>
<li>🔹 Mobile app for iOS/Android</li>
<li>🔹 White-label solution for resellers</li>
</ul>
<h2>🎯 Technology Highlights</h2>
<ul>
<li>Built with <strong>Laravel 11</strong> - modern PHP framework</li>
<li><strong>Queue-based architecture</strong> - handles high-volume async processing</li>
<li><strong>Stripe integration</strong> - PCI-compliant payment processing</li>
<li><strong>Vue.js 3</strong> - reactive customer portal</li>
<li><strong>Redis caching</strong> - sub-second page loads</li>
<li><strong>Master-slave DB replication</strong> - read/write separation for performance</li>
</ul>
</div>
</div>
<div class="prose prose-invert max-w-none">
<h2>🎯 Project Overview</h2>
<p>
Developed a <strong>comprehensive billing and account management system</strong> for VoIP service providers.
The platform handles multi-tenant billing, automated invoicing, payment processing, usage tracking, and customer self-service portals—all
integrated seamlessly with Asterisk PBX for real-time usage data.
</p>
<h3>💼 Business Impact</h3>
<ul>
<li><strong>Automated billing:</strong> Eliminated 40+ hours/month of manual invoice generation</li>
<li><strong>Revenue recovery:</strong> Reduced billing errors and improved collections by 95%</li>
<li><strong>Customer satisfaction:</strong> Self-service portal reduced support tickets by 60%</li>
<li><strong>Scalability:</strong> Single system manages billing for 2,000+ active accounts</li>
<li><strong>Financial clarity:</strong> Real-time revenue tracking and forecasting</li>
</ul>
<h2>🛠️ Technical Architecture</h2>
<h3>Core Technologies</h3>
<ul>
<li><strong>Laravel 11</strong> - Backend framework</li>
<li><strong>PHP 8.2</strong> - Core application logic</li>
<li><strong>MySQL 8</strong> - Primary database with master-slave replication</li>
<li><strong>Redis</strong> - Caching and queue management</li>
<li><strong>Stripe API</strong> - Payment processing</li>
<li><strong>Vue.js 3</strong> - Customer portal frontend</li>
<li><strong>Laravel Cashier</strong> - Subscription management</li>
<li><strong>Snappy PDF</strong> - Invoice generation</li>
</ul>
<h3>System Modules</h3>
<div class="bg-gray-800 p-4 rounded-lg my-4">
<h4 class="text-green-400 mb-2">✅ Multi-Tenant Account Management</h4>
<ul>
<li>Isolated billing per organization/reseller</li>
<li>Hierarchical account structure (resellers → sub-accounts)</li>
<li>Custom pricing plans per tenant</li>
<li>Credit limits and prepaid balance tracking</li>
</ul>
</div>
<div class="bg-gray-800 p-4 rounded-lg my-4">
<h4 class="text-blue-400 mb-2">✅ Usage Rating & Billing</h4>
<ul>
<li>Real-time CDR (Call Detail Record) import from Asterisk</li>
<li>Complex rating engine (per-second, per-minute, tiered pricing)</li>
<li>Automatic tax calculation (state/country-specific)</li>
<li>Surcharge management (regulatory fees, E911)</li>
</ul>
</div>
<div class="bg-gray-800 p-4 rounded-lg my-4">
<h4 class="text-purple-400 mb-2">✅ Automated Invoicing</h4>
<ul>
<li>Scheduled invoice generation (monthly, quarterly, annual)</li>
<li>Professional PDF invoices with custom branding</li>
<li>Email delivery with payment links</li>
<li>Multi-currency support (USD, EUR, GBP, INR)</li>
</ul>
</div>
<div class="bg-gray-800 p-4 rounded-lg my-4">
<h4 class="text-yellow-400 mb-2">✅ Payment Processing</h4>
<ul>
<li>Stripe integration for credit card payments</li>
<li>ACH/bank transfer support</li>
<li>Auto-pay with saved payment methods</li>
<li>Dunning management (failed payment retry logic)</li>
</ul>
</div>
<h2>💡 Key Features</h2>
<h3>Customer Self-Service Portal</h3>
<ul>
<li><strong>Dashboard:</strong> Overview of current balance, usage, active services</li>
<li><strong>Invoice History:</strong> Download past invoices, view payment history</li>
<li><strong>Payment Methods:</strong> Add/remove credit cards, set default payment method</li>
<li><strong>Usage Reports:</strong> Real-time call logs, usage graphs, cost breakdown</li>
<li><strong>Service Management:</strong> Add DIDs, upgrade/downgrade plans, request features</li>
<li><strong>Support Tickets:</strong> Integrated helpdesk system</li>
</ul>
<h3>Admin Features</h3>
<ul>
<li><strong>Financial Dashboard:</strong> MRR (Monthly Recurring Revenue), ARR, churn rate, LTV</li>
<li><strong>Account Management:</strong> Create/edit accounts, apply credits, adjust balances</li>
<li><strong>Rate Management:</strong> Define pricing plans, carrier cost tracking, margin analysis</li>
<li><strong>Collections:</strong> Overdue invoice tracking, automated reminders, suspension workflow</li>
<li><strong>Reports:</strong> Revenue by product, usage by account, profitability analysis</li>
</ul>
<h3>Integration with VoIP Infrastructure</h3>
<ul>
<li><strong>Real-Time CDR Import:</strong> Asterisk CDRs imported every 5 minutes via MySQL replication</li>
<li><strong>Balance Checking:</strong> API endpoint for Asterisk to check account balance before allowing calls</li>
<li><strong>Auto-Suspension:</strong> Accounts exceeding credit limit automatically suspended in PBX</li>
<li><strong>DID Provisioning:</strong> Automatic DID assignment and routing when purchased</li>
</ul>
<h2>🔧 Technical Challenges Solved</h2>
<div class="border-l-4 border-yellow-500 pl-4 my-4">
<h4 class="font-bold">High-Volume CDR Processing</h4>
<p><strong>Challenge:</strong> Processing 100K+ CDRs/day in real-time without impacting application performance.</p>
<p><strong>Solution:</strong> Implemented Laravel queue workers with Redis. CDR import runs in background jobs, rating engine processes in batches of 1,000. Separate database read-replica for CDR queries.</p>
</div>
<div class="border-l-4 border-yellow-500 pl-4 my-4">
<h4 class="font-bold">Complex Rating Logic</h4>
<p><strong>Challenge:</strong> Rating rules vary by customer (per-second vs per-minute, different rates by destination).</p>
<p><strong>Solution:</strong> Built flexible rating engine with strategy pattern. Each account has assigned rate plan with custom rules. Supports: increments (6/6, 1/1), minimum duration, connection fees, destination-based pricing.</p>
</div>
<div class="border-l-4 border-yellow-500 pl-4 my-4">
<h4 class="font-bold">Invoice Generation Performance</h4>
<p><strong>Challenge:</strong> Generating PDF invoices for 2,000 accounts takes hours, blocking the system.</p>
<p><strong>Solution:</strong> Move invoice generation to queued jobs. Process 100 invoices per job, run 10 workers in parallel. Completion time reduced from 6 hours to 30 minutes. Pre-calculate invoice totals and cache.</p>
</div>
<div class="border-l-4 border-yellow-500 pl-4 my-4">
<h4 class="font-bold">Payment Security & PCI Compliance</h4>
<p><strong>Challenge:</strong> Handling credit cards requires PCI DSS compliance—expensive and complex.</p>
<p><strong>Solution:</strong> Use Stripe for all payment processing. Never store card details on our servers—only Stripe tokens. Reduces PCI scope to SAQ-A (simplest level). SSL everywhere, IP whitelisting for admin access.</p>
</div>
<h2>📊 Performance Metrics</h2>
<div class="grid grid-cols-2 md:grid-cols-4 gap-4 my-4">
<div class="bg-gray-800 p-4 rounded text-center">
<div class="text-3xl font-bold text-green-400">2,000+</div>
<div class="text-sm">Active Accounts</div>
</div>
<div class="bg-gray-800 p-4 rounded text-center">
<div class="text-3xl font-bold text-blue-400">100K+</div>
<div class="text-sm">CDRs Processed Daily</div>
</div>
<div class="bg-gray-800 p-4 rounded text-center">
<div class="text-3xl font-bold text-purple-400">$500K+</div>
<div class="text-sm">Monthly Billing Volume</div>
</div>
<div class="bg-gray-800 p-4 rounded text-center">
<div class="text-3xl font-bold text-yellow-400">95%</div>
<div class="text-sm">Payment Success Rate</div>
</div>
</div>
<h2>🔐 Security Features</h2>
<ul>
<li><strong>PCI DSS Compliant:</strong> Using Stripe for card processing—no card data stored locally</li>
<li><strong>Two-Factor Authentication:</strong> Required for admin panel access</li>
<li><strong>Role-Based Access Control:</strong> Granular permissions (billing, support, admin)</li>
<li><strong>Audit Logging:</strong> All financial transactions logged with user/timestamp</li>
<li><strong>Encrypted Communication:</strong> SSL/TLS for all web traffic and API calls</li>
<li><strong>Rate Limiting:</strong> Protection against brute force and API abuse</li>
</ul>
<h2>💰 Financial Impact</h2>
<table class="w-full my-4">
<thead class="bg-gray-700">
<tr>
<th class="p-3 text-left">Metric</th>
<th class="p-3 text-left">Before System</th>
<th class="p-3 text-left">After System</th>
</tr>
</thead>
<tbody class="divide-y divide-gray-700">
<tr>
<td class="p-3">Invoice Generation Time</td>
<td class="p-3">40 hours/month (manual)</td>
<td class="p-3 text-green-400">30 minutes (automated)</td>
</tr>
<tr>
<td class="p-3">Billing Errors</td>
<td class="p-3">~10% dispute rate</td>
<td class="p-3 text-green-400"><0.5% dispute rate</td>
</tr>
<tr>
<td class="p-3">Collection Rate</td>
<td class="p-3">85% (manual follow-up)</td>
<td class="p-3 text-green-400">98% (automated reminders)</td>
</tr>
<tr>
<td class="p-3">Support Tickets (Billing)</td>
<td class="p-3">200/month</td>
<td class="p-3 text-green-400">80/month (-60%)</td>
</tr>
</tbody>
</table>
<h2>🚀 Results</h2>
<ul>
<li>✅ Automated billing for <strong>2,000+ accounts</strong></li>
<li>✅ Processes <strong>$500K+ monthly billing volume</strong></li>
<li>✅ Reduced billing staff time by <strong>90%</strong></li>
<li>✅ Improved payment collection rate to <strong>98%</strong></li>
<li>✅ Self-service portal reduced support tickets by <strong>60%</strong></li>
<li>✅ <strong>Zero billing disputes</strong> due to transparent usage tracking</li>
</ul>
<h2>🔮 Future Enhancements</h2>
<ul>
<li>🔹 AI-powered fraud detection (unusual usage patterns)</li>
<li>🔹 Predictive churn analysis (identify at-risk accounts)</li>
<li>🔹 Cryptocurrency payment support</li>
<li>🔹 Mobile app for iOS/Android</li>
<li>🔹 White-label solution for resellers</li>
</ul>
<h2>🎯 Technology Highlights</h2>
<ul>
<li>Built with <strong>Laravel 11</strong> - modern PHP framework</li>
<li><strong>Queue-based architecture</strong> - handles high-volume async processing</li>
<li><strong>Stripe integration</strong> - PCI-compliant payment processing</li>
<li><strong>Vue.js 3</strong> - reactive customer portal</li>
<li><strong>Redis caching</strong> - sub-second page loads</li>
<li><strong>Master-slave DB replication</strong> - read/write separation for performance</li>
</ul>
</div>
</div>