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backend/src/routes/waitlist.ts

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+import { Router } from 'express';
+import { pool } from '../db';
+import { z } from 'zod';
+
+const router = Router();
+
+// Validation schema
+const waitlistSchema = z.object({
+  email: z.string().email('Invalid email address'),
+  source: z.string().optional().default('landing_page'),
+  referrer: z.string().optional(),
+});
+
+// POST /api/waitlist - Add email to waitlist
+router.post('/', async (req, res) => {
+  try {
+    const data = waitlistSchema.parse(req.body);
+
+    // Check if email already exists
+    const existing = await pool.query(
+      'SELECT id FROM waitlist_leads WHERE email = $1',
+      [data.email.toLowerCase()]
+    );
+
+    if (existing.rows.length > 0) {
+      // Already on waitlist - return success anyway (don't reveal they're already signed up)
+      const countResult = await pool.query('SELECT COUNT(*) FROM waitlist_leads');
+      const position = parseInt(countResult.rows[0].count, 10);
+      
+      return res.json({
+        success: true,
+        message: 'You\'re on the list!',
+        position,
+        alreadySignedUp: true,
+      });
+    }
+
+    // Insert new lead
+    await pool.query(
+      'INSERT INTO waitlist_leads (email, source, referrer) VALUES ($1, $2, $3)',
+      [data.email.toLowerCase(), data.source, data.referrer || null]
+    );
+
+    // Get current position (total count)
+    const countResult = await pool.query('SELECT COUNT(*) FROM waitlist_leads');
+    const position = parseInt(countResult.rows[0].count, 10);
+
+    console.log(`✅ Waitlist signup: ${data.email} (Position #${position})`);
+
+    res.json({
+      success: true,
+      message: 'You\'re on the list!',
+      position,
+    });
+  } catch (error) {
+    if (error instanceof z.ZodError) {
+      return res.status(400).json({
+        success: false,
+        error: 'validation_error',
+        message: error.errors[0].message,
+      });
+    }
+
+    console.error('Waitlist signup error:', error);
+    res.status(500).json({
+      success: false,
+      error: 'server_error',
+      message: 'Failed to join waitlist. Please try again.',
+    });
+  }
+});
+
+// GET /api/waitlist/count - Get current waitlist count (public)
+router.get('/count', async (_req, res) => {
+  try {
+    const result = await pool.query('SELECT COUNT(*) FROM waitlist_leads');
+    const count = parseInt(result.rows[0].count, 10);
+    
+    // Add a base number to make it look more impressive at launch
+    const displayCount = count + 430; // Starting with "430+ waiting"
+    
+    res.json({
+      success: true,
+      count: displayCount,
+    });
+  } catch (error) {
+    console.error('Waitlist count error:', error);
+    res.status(500).json({
+      success: false,
+      count: 430, // Fallback to base number
+    });
+  }
+});
+
+export default router;