diff --git a/backend/prisma/migrations/20260630120000_add_stream_event_stream_id_timestamp_index/migration.sql b/backend/prisma/migrations/20260630120000_add_stream_event_stream_id_timestamp_index/migration.sql
new file mode 100644
index 00000000..ec2e12ec
--- /dev/null
+++ b/backend/prisma/migrations/20260630120000_add_stream_event_stream_id_timestamp_index/migration.sql
@@ -0,0 +1,8 @@
+-- Replace the unused (streamId, createdAt) composite with (streamId, timestamp),
+-- which matches streamId-scoped event listings that ORDER BY timestamp.
+
+-- CreateIndex
+CREATE INDEX IF NOT EXISTS "StreamEvent_streamId_timestamp_idx" ON "StreamEvent"("streamId", "timestamp");
+
+-- DropIndex
+DROP INDEX IF EXISTS "StreamEvent_streamId_createdAt_idx";
diff --git a/backend/prisma/schema.prisma b/backend/prisma/schema.prisma
index d0caba15..4ff22965 100644
--- a/backend/prisma/schema.prisma
+++ b/backend/prisma/schema.prisma
@@ -86,5 +86,6 @@ model StreamEvent {
   @@index([timestamp])
   @@index([transactionHash])
   @@index([createdAt])
-  @@index([streamId, createdAt])
+  @@index([streamId, timestamp])
+  @@unique([transactionHash, eventType])
 }
diff --git a/backend/tests/integration/streams.test.ts b/backend/tests/integration/streams.test.ts
index 0a8c82f1..c66e1e8b 100644
--- a/backend/tests/integration/streams.test.ts
+++ b/backend/tests/integration/streams.test.ts
@@ -231,6 +231,17 @@ describe('GET /v1/streams/:id/events — pagination and eventType filter', () =>
     expect(res.body).toHaveProperty('hasMore');
     expect(Array.isArray(res.body.data)).toBe(true);
     expect(res.body.hasMore).toBe(false);
+
+    const callArgs = mockPrisma.streamEvent.findMany.mock.calls[0]![0] as {
+      where: { streamId: number };
+      orderBy: { timestamp: string };
+      take: number;
+      skip: number;
+    };
+    expect(callArgs.where.streamId).toBe(1);
+    expect(callArgs.orderBy).toEqual({ timestamp: 'desc' });
+    expect(callArgs.take).toBe(10);
+    expect(callArgs.skip).toBe(0);
   });
 
   it('enforces default limit of 50', async () => {
diff --git a/backend/tests/stream.controller.test.ts b/backend/tests/stream.controller.test.ts
index 7a208ce1..0310ed67 100644
--- a/backend/tests/stream.controller.test.ts
+++ b/backend/tests/stream.controller.test.ts
@@ -1,24 +1,11 @@
-import { describe, it, expect, vi, beforeEach } from "vitest";
-import {
-  createStream,
-  listStreams,
-  getStream,
-  getStreamClaimableAmount,
-  pauseStream,
-  resumeStream,
-} from "../src/controllers/stream.controller.js";
-import { prisma } from "../src/lib/prisma.js";
-import { claimableAmountService } from "../src/services/claimable.service.js";
-import * as sorobanService from "../src/services/sorobanService.js";
-import type { Request, Response } from "express";
-
-type TestRequest = Partial<Request> & {
-  user?: {
-    publicKey: string;
-  };
-};
-
-vi.mock("../src/lib/prisma.js", () => ({
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import { createStream, listStreams, getStream, getStreamEvents, getStreamClaimableAmount, pauseStream, resumeStream } from '../src/controllers/stream.controller.js';
+import { prisma } from '../src/lib/prisma.js';
+import { claimableAmountService } from '../src/services/claimable.service.js';
+import * as sorobanService from '../src/services/sorobanService.js';
+import type { Request, Response } from 'express';
+
+vi.mock('../src/lib/prisma.js', () => ({
   prisma: {
     stream: {
       upsert: vi.fn(),
@@ -29,6 +16,8 @@ vi.mock("../src/lib/prisma.js", () => ({
     },
     streamEvent: {
       create: vi.fn(),
+      findMany: vi.fn(),
+      count: vi.fn(),
     },
   },
 }));
@@ -235,8 +224,34 @@ describe("Stream Controller", () => {
       await getStream(req as Request, res as Response);
 
       expect(res.status).toHaveBeenCalledWith(200);
-      expect(res.json).toHaveBeenCalledWith(
-        expect.objectContaining({ streamId: 123 }),
+      expect(res.json).toHaveBeenCalledWith(expect.objectContaining({ streamId: 123 }));
+      expect(prisma.stream.findUnique).toHaveBeenCalledWith(
+        expect.objectContaining({
+          include: expect.objectContaining({
+            events: { orderBy: { timestamp: 'desc' } },
+          }),
+        }),
+      );
+    });
+  });
+
+  describe('getStreamEvents', () => {
+    it('should paginate stream events ordered by timestamp desc', async () => {
+      req.params = { streamId: '123' };
+      req.query = { limit: '10', offset: '0' };
+      (prisma.streamEvent.findMany as any).mockResolvedValue([]);
+      (prisma.streamEvent.count as any).mockResolvedValue(0);
+
+      await getStreamEvents(req as Request, res as Response);
+
+      expect(res.status).toHaveBeenCalledWith(200);
+      expect(prisma.streamEvent.findMany).toHaveBeenCalledWith(
+        expect.objectContaining({
+          where: { streamId: 123 },
+          orderBy: { timestamp: 'desc' },
+          take: 10,
+          skip: 0,
+        }),
       );
     });
   });
diff --git a/backend/tests/user.controller.test.ts b/backend/tests/user.controller.test.ts
index 6439d07b..6efeda19 100644
--- a/backend/tests/user.controller.test.ts
+++ b/backend/tests/user.controller.test.ts
@@ -167,6 +167,11 @@ describe('User Controller', () => {
       await getUserEvents(req as Request, res as Response, next);
 
       expect(res.status).toHaveBeenCalledWith(200);
+      expect(prisma.streamEvent.findMany).toHaveBeenCalledWith(
+        expect.objectContaining({
+          orderBy: { timestamp: 'desc' },
+        }),
+      );
       expect(res.json).toHaveBeenCalledWith(expect.objectContaining({
         data: [],
         total: 0,