diff --git a/SERVICE_INTEGRATIONS.md b/SERVICE_INTEGRATIONS.md
index b0f97888..48ca7ea2 100644
--- a/SERVICE_INTEGRATIONS.md
+++ b/SERVICE_INTEGRATIONS.md
@@ -44,7 +44,9 @@ Service Handler (shift created, donation completed, etc.)
 | `api/src/services/event-listeners/crm-activity.listener.ts` | CRM ContactActivity writer |
 | `api/src/services/event-listeners/calendar-sync.listener.ts` | Calendar unification |
 | `api/src/services/event-listeners/n8n-webhook.listener.ts` | n8n automation bridge |
-| `api/src/services/event-listeners/gancio.listener.ts` | Gancio event sync |
+| `api/src/services/event-listeners/gancio.listener.ts` | Gancio event sync (shifts + ticketed events) |
+| `api/src/services/event-listeners/engagement-scoring.listener.ts` | Contact engagement scores (Redis ZSET) |
+| `api/src/services/event-listeners/homepage-stats.listener.ts` | Homepage real-time counters + cache invalidation |
 
 ---
 
@@ -92,10 +94,16 @@ Service Handler (shift created, donation completed, etc.)
 - [x] Prisma migration: SHIFT, MEETING, TICKETED_EVENT added to CalendarItemSource enum
 - [x] Calendar sync listener: uses proper source types (SHIFT, MEETING, TICKETED_EVENT)
 
+### Phase 4c: New Data Listeners (2026-03-31)
+- [x] Engagement scoring listener (11 subscriptions, Redis ZSET leaderboard)
+- [x] Homepage stats listener (12 subscriptions, Redis counters + recent activity)
+- [x] GET /api/homepage/live-stats endpoint (public, real-time counters + recent)
+- [x] GET /api/observability/engagement-leaderboard endpoint (admin, top contacts)
+
 ### Phase 5: Future
-- [ ] Migrate remaining Gancio calls (ticketed-events, meeting-planner) to EventBus
-- [ ] Add engagement scoring listener
-- [ ] Add Homepage dashboard data listener
+- [ ] Migrate meeting-planner Gancio calls to EventBus (blocked: synchronous return value needed)
+- [ ] Homepage service: swap COUNT queries for Redis counters in getStats()
+- [ ] Engagement score materialization: periodic job to denormalize scores to Contact model
 
 ---
 
diff --git a/api/src/modules/homepage/homepage.routes.ts b/api/src/modules/homepage/homepage.routes.ts
index 40ae762f..00941453 100644
--- a/api/src/modules/homepage/homepage.routes.ts
+++ b/api/src/modules/homepage/homepage.routes.ts
@@ -1,5 +1,6 @@
 import { Router, Request, Response, NextFunction } from 'express';
 import { homepageService } from './homepage.service';
+import { homepageStats } from '../../services/event-listeners/homepage-stats.listener';
 
 const router = Router();
 
@@ -13,4 +14,17 @@ router.get('/', async (_req: Request, res: Response, next: NextFunction) => {
   }
 });
 
+// GET /api/homepage/live-stats — Real-time EventBus-driven counters (no auth)
+router.get('/live-stats', async (_req: Request, res: Response, next: NextFunction) => {
+  try {
+    const counters = await homepageStats.getCounters();
+    const recentSignups = await homepageStats.getRecent('signups', 5);
+    const recentDonations = await homepageStats.getRecent('donations', 5);
+    const recentResponses = await homepageStats.getRecent('responses', 5);
+    res.json({ counters, recent: { signups: recentSignups, donations: recentDonations, responses: recentResponses } });
+  } catch (err) {
+    next(err);
+  }
+});
+
 export { router as homepageRouter };
diff --git a/api/src/modules/observability/observability.routes.ts b/api/src/modules/observability/observability.routes.ts
index 1ff6d5d2..afc68061 100644
--- a/api/src/modules/observability/observability.routes.ts
+++ b/api/src/modules/observability/observability.routes.ts
@@ -230,4 +230,15 @@ router.get(
   },
 );
 
+// GET /api/observability/engagement-leaderboard — Top engaged contacts
+router.get(
+  '/engagement-leaderboard',
+  async (req: Request, res: Response) => {
+    const { engagementScoring } = await import('../../services/event-listeners/engagement-scoring.listener');
+    const limit = Math.min(parseInt(req.query.limit as string) || 20, 100);
+    const leaderboard = await engagementScoring.getLeaderboard(limit);
+    res.json({ leaderboard, count: leaderboard.length });
+  },
+);
+
 export const observabilityRouter = router;
diff --git a/api/src/services/event-listeners/engagement-scoring.listener.ts b/api/src/services/event-listeners/engagement-scoring.listener.ts
new file mode 100644
index 00000000..7c733c64
--- /dev/null
+++ b/api/src/services/event-listeners/engagement-scoring.listener.ts
@@ -0,0 +1,212 @@
+/**
+ * Engagement Scoring EventBus Listener
+ *
+ * Maintains a real-time engagement score for each contact based on their
+ * activity across the platform. Scores are stored in Redis for fast access
+ * and a sorted set provides leaderboard queries.
+ *
+ * Scoring weights:
+ *   Donation completed     +50
+ *   Subscription activated +40
+ *   Product purchased      +30
+ *   Shift signup           +20
+ *   Canvass visit          +15
+ *   Response submitted     +15
+ *   Campaign email sent    +10
+ *   SMS received           +10
+ *   Email opened           +5
+ *   Email link clicked     +8
+ *   Video viewed           +3
+ *
+ * Redis keys:
+ *   engagement:score:{contactId}   — total score (string/integer)
+ *   engagement:leaderboard         — sorted set (contactId → score)
+ *   engagement:last:{contactId}    — ISO timestamp of last activity
+ *
+ * No feature guard — always active (scores are ephemeral in Redis).
+ */
+
+import { eventBus } from '../event-bus.service';
+import { logger } from '../../utils/logger';
+
+// Lazy-import to avoid circular dependency
+let redisPromise: ReturnType<typeof getRedis> | null = null;
+async function getRedis() {
+  const { redis } = await import('../../config/redis');
+  return redis;
+}
+function lazyRedis() {
+  if (!redisPromise) redisPromise = getRedis();
+  return redisPromise;
+}
+
+let prismaPromise: ReturnType<typeof getPrisma> | null = null;
+async function getPrisma() {
+  const { prisma } = await import('../../config/database');
+  return prisma;
+}
+function lazyPrisma() {
+  if (!prismaPromise) prismaPromise = getPrisma();
+  return prismaPromise;
+}
+
+/** Find contactId by email. Returns null if not found. */
+async function findContactByEmail(email?: string | null): Promise<string | null> {
+  if (!email) return null;
+  try {
+    const prisma = await lazyPrisma();
+    const row = await prisma.contactEmail.findFirst({
+      where: { email: email.toLowerCase() },
+      select: { contactId: true },
+    });
+    return row?.contactId ?? null;
+  } catch {
+    return null;
+  }
+}
+
+/** Find contactId by phone. Returns null if not found. */
+async function findContactByPhone(phone: string): Promise<string | null> {
+  try {
+    const prisma = await lazyPrisma();
+    const row = await prisma.contactPhone.findFirst({
+      where: { phone },
+      select: { contactId: true },
+    });
+    return row?.contactId ?? null;
+  } catch {
+    return null;
+  }
+}
+
+/** Increment a contact's engagement score in Redis. */
+async function addScore(contactId: string, points: number): Promise<void> {
+  try {
+    const redis = await lazyRedis();
+    const pipeline = redis.pipeline();
+    pipeline.incrby(`engagement:score:${contactId}`, points);
+    pipeline.zincrby('engagement:leaderboard', points, contactId);
+    pipeline.set(`engagement:last:${contactId}`, new Date().toISOString());
+    await pipeline.exec();
+  } catch (err) {
+    logger.debug(`Engagement scoring failed for ${contactId}:`, err);
+  }
+}
+
+export function registerEngagementScoringListener(): void {
+  // --- High-value actions ---
+
+  eventBus.subscribe('payment.donation.completed', 'engagement:donation', async (payload) => {
+    const contactId = await findContactByEmail(payload.email);
+    if (contactId) await addScore(contactId, 50);
+  });
+
+  eventBus.subscribe('payment.subscription.activated', 'engagement:subscription', async (payload) => {
+    const contactId = await findContactByEmail(payload.email);
+    if (contactId) await addScore(contactId, 40);
+  });
+
+  eventBus.subscribe('payment.product.purchased', 'engagement:purchase', async (payload) => {
+    const contactId = await findContactByEmail(payload.email);
+    if (contactId) await addScore(contactId, 30);
+  });
+
+  // --- Volunteer actions ---
+
+  eventBus.subscribe('shift.signup.created', 'engagement:shift-signup', async (payload) => {
+    const contactId = await findContactByEmail(payload.userEmail);
+    if (contactId) await addScore(contactId, 20);
+  });
+
+  eventBus.subscribe('canvass.visit.recorded', 'engagement:canvass-visit', async (payload) => {
+    const contactId = await findContactByEmail(payload.email);
+    if (contactId) await addScore(contactId, 15);
+  });
+
+  eventBus.subscribe('response.submitted', 'engagement:response', async (payload) => {
+    const contactId = await findContactByEmail(payload.userEmail);
+    if (contactId) await addScore(contactId, 15);
+  });
+
+  // --- Communication actions ---
+
+  eventBus.subscribe('campaign.email.sent', 'engagement:email-sent', async (payload) => {
+    const contactId = await findContactByEmail(payload.email);
+    if (contactId) await addScore(contactId, 10);
+  });
+
+  eventBus.subscribe('sms.message.received', 'engagement:sms-received', async (payload) => {
+    const contactId = await findContactByPhone(payload.phone);
+    if (contactId) await addScore(contactId, 10);
+  });
+
+  eventBus.subscribe('listmonk.email.clicked', 'engagement:email-clicked', async (payload) => {
+    const contactId = await findContactByEmail(payload.subscriberEmail);
+    if (contactId) await addScore(contactId, 8);
+  });
+
+  eventBus.subscribe('listmonk.email.opened', 'engagement:email-opened', async (payload) => {
+    const contactId = await findContactByEmail(payload.subscriberEmail);
+    if (contactId) await addScore(contactId, 5);
+  });
+
+  // --- Passive actions ---
+
+  eventBus.subscribe('media.video.viewed', 'engagement:video-view', async (payload) => {
+    if (!payload.userId) return;
+    try {
+      const prisma = await lazyPrisma();
+      const user = await prisma.user.findUnique({
+        where: { id: payload.userId },
+        select: { email: true },
+      });
+      if (!user) return;
+      const contactId = await findContactByEmail(user.email);
+      if (contactId) await addScore(contactId, 3);
+    } catch {
+      // silent
+    }
+  });
+}
+
+/**
+ * Utility functions for querying engagement scores.
+ * Can be imported by API routes for score display.
+ */
+export const engagementScoring = {
+  /** Get a single contact's score */
+  async getScore(contactId: string): Promise<number> {
+    try {
+      const redis = await lazyRedis();
+      const score = await redis.get(`engagement:score:${contactId}`);
+      return score ? parseInt(score, 10) : 0;
+    } catch {
+      return 0;
+    }
+  },
+
+  /** Get top N contacts by engagement score */
+  async getLeaderboard(limit = 20): Promise<Array<{ contactId: string; score: number }>> {
+    try {
+      const redis = await lazyRedis();
+      const results = await redis.zrevrange('engagement:leaderboard', 0, limit - 1, 'WITHSCORES');
+      const leaderboard: Array<{ contactId: string; score: number }> = [];
+      for (let i = 0; i < results.length; i += 2) {
+        leaderboard.push({ contactId: results[i], score: parseInt(results[i + 1], 10) });
+      }
+      return leaderboard;
+    } catch {
+      return [];
+    }
+  },
+
+  /** Get last activity timestamp for a contact */
+  async getLastActivity(contactId: string): Promise<string | null> {
+    try {
+      const redis = await lazyRedis();
+      return await redis.get(`engagement:last:${contactId}`);
+    } catch {
+      return null;
+    }
+  },
+};
diff --git a/api/src/services/event-listeners/homepage-stats.listener.ts b/api/src/services/event-listeners/homepage-stats.listener.ts
new file mode 100644
index 00000000..b4277d40
--- /dev/null
+++ b/api/src/services/event-listeners/homepage-stats.listener.ts
@@ -0,0 +1,177 @@
+/**
+ * Homepage Stats EventBus Listener
+ *
+ * Maintains real-time counters in Redis for the homepage dashboard and
+ * invalidates the homepage cache when underlying data changes.
+ *
+ * Redis keys:
+ *   homepage:counter:emails        — total campaign emails sent
+ *   homepage:counter:signups       — total shift signups
+ *   homepage:counter:donations     — total donation count
+ *   homepage:counter:donations:amt — total donation amount (cents)
+ *   homepage:counter:responses     — total campaign responses
+ *   homepage:counter:canvass       — total canvass visits
+ *   homepage:counter:videos        — total video views
+ *   homepage:recent:{type}         — recent activity list (capped at 20)
+ *
+ * Cache invalidation:
+ *   Deletes `homepage:public` when shifts, campaigns, or media change
+ *   so the next request rebuilds with fresh data.
+ *
+ * No feature guard — always active (counters are ephemeral in Redis).
+ */
+
+import { eventBus } from '../event-bus.service';
+import { logger } from '../../utils/logger';
+
+let redisPromise: ReturnType<typeof getRedis> | null = null;
+async function getRedis() {
+  const { redis } = await import('../../config/redis');
+  return redis;
+}
+function lazyRedis() {
+  if (!redisPromise) redisPromise = getRedis();
+  return redisPromise;
+}
+
+const HOMEPAGE_CACHE_KEY = 'homepage:public';
+
+/** Increment a counter and optionally invalidate the homepage cache. */
+async function incrCounter(key: string, invalidateCache = false): Promise<void> {
+  try {
+    const redis = await lazyRedis();
+    await redis.incr(`homepage:counter:${key}`);
+    if (invalidateCache) await redis.del(HOMEPAGE_CACHE_KEY);
+  } catch (err) {
+    logger.debug(`Homepage counter increment failed (${key}):`, err);
+  }
+}
+
+/** Push a recent activity entry to a capped list. */
+async function pushRecent(type: string, entry: Record<string, unknown>): Promise<void> {
+  try {
+    const redis = await lazyRedis();
+    const key = `homepage:recent:${type}`;
+    await redis.lpush(key, JSON.stringify({ ...entry, at: new Date().toISOString() }));
+    await redis.ltrim(key, 0, 19); // keep last 20
+    await redis.expire(key, 86400); // expire after 24h
+  } catch {
+    // silent
+  }
+}
+
+/** Invalidate homepage cache without incrementing anything. */
+async function invalidateCache(): Promise<void> {
+  try {
+    const redis = await lazyRedis();
+    await redis.del(HOMEPAGE_CACHE_KEY);
+  } catch {
+    // silent
+  }
+}
+
+export function registerHomepageStatsListener(): void {
+  // --- Counter increments ---
+
+  eventBus.subscribe('campaign.email.sent', 'homepage:email-sent', async () => {
+    await incrCounter('emails');
+  });
+
+  eventBus.subscribe('shift.signup.created', 'homepage:shift-signup', async (payload) => {
+    await incrCounter('signups', true); // invalidate — signup count visible on homepage
+    await pushRecent('signups', { name: payload.userName, shift: payload.shiftTitle });
+  });
+
+  eventBus.subscribe('payment.donation.completed', 'homepage:donation', async (payload) => {
+    await incrCounter('donations');
+    try {
+      const redis = await lazyRedis();
+      await redis.incrby('homepage:counter:donations:amt', payload.amountCents);
+    } catch { /* silent */ }
+    await pushRecent('donations', { name: payload.name, amount: payload.amountCents });
+  });
+
+  eventBus.subscribe('response.submitted', 'homepage:response', async (payload) => {
+    await incrCounter('responses');
+    await pushRecent('responses', { campaign: payload.campaignTitle, rep: payload.representativeName });
+  });
+
+  eventBus.subscribe('canvass.visit.recorded', 'homepage:canvass', async () => {
+    await incrCounter('canvass');
+  });
+
+  eventBus.subscribe('media.video.viewed', 'homepage:video-view', async () => {
+    await incrCounter('videos');
+  });
+
+  // --- Cache invalidation (data visible on homepage changed) ---
+
+  eventBus.subscribe('shift.created', 'homepage:shift-changed', async () => {
+    await invalidateCache();
+  });
+
+  eventBus.subscribe('shift.deleted', 'homepage:shift-deleted', async () => {
+    await invalidateCache();
+  });
+
+  eventBus.subscribe('campaign.published', 'homepage:campaign-published', async () => {
+    await invalidateCache();
+  });
+
+  eventBus.subscribe('campaign.status.changed', 'homepage:campaign-status', async () => {
+    await invalidateCache();
+  });
+
+  eventBus.subscribe('media.video.published', 'homepage:video-published', async () => {
+    await invalidateCache();
+  });
+
+  eventBus.subscribe('ticketed-event.published', 'homepage:event-published', async () => {
+    await invalidateCache();
+  });
+}
+
+/**
+ * Utility functions for reading homepage stats from Redis.
+ * Can be imported by the homepage service for real-time counters.
+ */
+export const homepageStats = {
+  /** Get all counter values */
+  async getCounters(): Promise<Record<string, number>> {
+    try {
+      const redis = await lazyRedis();
+      const keys = [
+        'homepage:counter:emails',
+        'homepage:counter:signups',
+        'homepage:counter:donations',
+        'homepage:counter:donations:amt',
+        'homepage:counter:responses',
+        'homepage:counter:canvass',
+        'homepage:counter:videos',
+      ];
+      const values = await redis.mget(...keys);
+      return {
+        totalEmailsSent: parseInt(values[0] ?? '0', 10),
+        totalShiftSignups: parseInt(values[1] ?? '0', 10),
+        totalDonations: parseInt(values[2] ?? '0', 10),
+        totalDonationAmountCents: parseInt(values[3] ?? '0', 10),
+        totalResponses: parseInt(values[4] ?? '0', 10),
+        totalCanvassVisits: parseInt(values[5] ?? '0', 10),
+        totalVideoViews: parseInt(values[6] ?? '0', 10),
+      };
+    } catch {
+      return {};
+    }
+  },
+
+  /** Get recent activity of a given type */
+  async getRecent(type: string, limit = 10): Promise<Array<Record<string, unknown>>> {
+    try {
+      const redis = await lazyRedis();
+      const items = await redis.lrange(`homepage:recent:${type}`, 0, limit - 1);
+      return items.map(item => JSON.parse(item));
+    } catch {
+      return [];
+    }
+  },
+};
diff --git a/api/src/services/event-listeners/index.ts b/api/src/services/event-listeners/index.ts
index 163a08ab..bd9c061f 100644
--- a/api/src/services/event-listeners/index.ts
+++ b/api/src/services/event-listeners/index.ts
@@ -12,6 +12,8 @@ import { registerCrmActivityListener } from './crm-activity.listener';
 import { registerCalendarSyncListener } from './calendar-sync.listener';
 import { registerN8nWebhookListener } from './n8n-webhook.listener';
 import { registerGancioListener } from './gancio.listener';
+import { registerEngagementScoringListener } from './engagement-scoring.listener';
+import { registerHomepageStatsListener } from './homepage-stats.listener';
 
 export function registerAllEventListeners(): void {
   const listeners = [
@@ -21,6 +23,8 @@ export function registerAllEventListeners(): void {
     { name: 'Calendar Sync', register: registerCalendarSyncListener },
     { name: 'n8n Webhook', register: registerN8nWebhookListener },
     { name: 'Gancio', register: registerGancioListener },
+    { name: 'Engagement Scoring', register: registerEngagementScoringListener },
+    { name: 'Homepage Stats', register: registerHomepageStatsListener },
   ];
 
   let registered = 0;